/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/unroll-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 19:30:45,512 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 19:30:45,514 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 19:30:45,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 19:30:45,561 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-06 19:30:45,562 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-06 19:30:45,563 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-06 19:30:45,567 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-06 19:30:45,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-06 19:30:45,568 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-06 19:30:45,570 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-06 19:30:45,574 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-06 19:30:45,575 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-06 19:30:45,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-06 19:30:45,578 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-06 19:30:45,579 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-06 19:30:45,584 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-06 19:30:45,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 19:30:45,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 19:30:45,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 19:30:45,592 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 [2021-08-06 19:30:45,619 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 19:30:45,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 19:30:45,639 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 19:30:45,639 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 19:30:45,639 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 19:30:45,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 19:30:45,639 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 19:30:45,639 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 19:30:45,640 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 19:30:45,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 19:30:45,640 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 19:30:45,641 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 19:30:45,641 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 19:30:45,641 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 19:30:45,641 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 19:30:45,641 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 19:30:45,641 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 19:30:45,641 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 19:30:45,641 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 19:30:45,641 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 19:30:45,642 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 19:30:45,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 19:30:45,642 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 19:30:45,642 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 19:30:45,642 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 19:30:45,642 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 19:30:45,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 19:30:45,642 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 19:30:45,642 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 19:30:45,643 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 19:30:45,643 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 19:30:45,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 19:30:45,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 19:30:45,964 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 19:30:45,965 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 19:30:45,965 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 19:30:45,966 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-4.wvr.bpl [2021-08-06 19:30:45,966 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-4.wvr.bpl' [2021-08-06 19:30:45,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 19:30:46,000 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 19:30:46,001 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 19:30:46,001 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 19:30:46,001 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 19:30:46,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:30:45" (1/1) ... [2021-08-06 19:30:46,015 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:30:45" (1/1) ... [2021-08-06 19:30:46,020 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 19:30:46,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 19:30:46,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 19:30:46,022 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 19:30:46,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:30:45" (1/1) ... [2021-08-06 19:30:46,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:30:45" (1/1) ... [2021-08-06 19:30:46,028 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:30:45" (1/1) ... [2021-08-06 19:30:46,029 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:30:45" (1/1) ... [2021-08-06 19:30:46,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:30:45" (1/1) ... [2021-08-06 19:30:46,033 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:30:45" (1/1) ... [2021-08-06 19:30:46,034 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:30:45" (1/1) ... [2021-08-06 19:30:46,035 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 19:30:46,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 19:30:46,036 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 19:30:46,036 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 19:30:46,037 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:30:45" (1/1) ... [2021-08-06 19:30:46,042 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 19:30:46,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:46,058 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-06 19:30:46,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-06 19:30:46,092 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 19:30:46,092 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 19:30:46,092 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 19:30:46,092 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 19:30:46,092 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 19:30:46,092 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 19:30:46,092 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 19:30:46,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 19:30:46,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 19:30:46,093 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 19:30:46,264 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 19:30:46,264 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-06 19:30:46,264 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-08-06 19:30:46,265 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-08-06 19:30:46,266 INFO L202 PluginConnector]: Adding new model unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 07:30:46 BoogieIcfgContainer [2021-08-06 19:30:46,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 19:30:46,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 19:30:46,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 19:30:46,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 19:30:46,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:30:45" (1/2) ... [2021-08-06 19:30:46,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42216f4f and model type unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 07:30:46, skipping insertion in model container [2021-08-06 19:30:46,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 07:30:46" (2/2) ... [2021-08-06 19:30:46,271 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.bpl [2021-08-06 19:30:46,273 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 19:30:46,274 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 19:30:46,274 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 19:30:46,274 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 19:30:46,292 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-06 19:30:46,318 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 19:30:46,322 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-06 19:30:46,322 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-06 19:30:46,383 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 12 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) [2021-08-06 19:30:46,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-06 19:30:46,387 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:46,387 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:46,387 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:46,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:46,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1740926187, now seen corresponding path program 1 times [2021-08-06 19:30:46,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:46,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927170056] [2021-08-06 19:30:46,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:46,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:46,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:46,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:46,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:46,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927170056] [2021-08-06 19:30:46,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927170056] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:30:46,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:30:46,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 19:30:46,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075236654] [2021-08-06 19:30:46,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 19:30:46,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:46,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 19:30:46,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:30:46,518 INFO L87 Difference]: Start difference. First operand has 13 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 12 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:46,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:46,543 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2021-08-06 19:30:46,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 19:30:46,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-08-06 19:30:46,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:46,549 INFO L225 Difference]: With dead ends: 22 [2021-08-06 19:30:46,549 INFO L226 Difference]: Without dead ends: 13 [2021-08-06 19:30:46,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:30:46,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-08-06 19:30:46,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-08-06 19:30:46,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:46,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 19 transitions. [2021-08-06 19:30:46,572 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 19 transitions. Word has length 9 [2021-08-06 19:30:46,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:46,572 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 19 transitions. [2021-08-06 19:30:46,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:46,573 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 19 transitions. [2021-08-06 19:30:46,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-06 19:30:46,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:46,574 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:46,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 19:30:46,574 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:46,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:46,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1853682080, now seen corresponding path program 1 times [2021-08-06 19:30:46,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:46,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090948014] [2021-08-06 19:30:46,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:46,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:46,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:46,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:46,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090948014] [2021-08-06 19:30:46,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090948014] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:46,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247736478] [2021-08-06 19:30:46,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:46,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:46,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:46,661 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:46,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 19:30:46,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:46,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-06 19:30:46,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:46,842 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:30:46,844 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:30:46,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:46,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247736478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:46,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:46,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-08-06 19:30:46,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982379239] [2021-08-06 19:30:46,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 19:30:46,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:46,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 19:30:46,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:30:46,876 INFO L87 Difference]: Start difference. First operand 13 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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) [2021-08-06 19:30:46,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:46,905 INFO L93 Difference]: Finished difference Result 15 states and 23 transitions. [2021-08-06 19:30:46,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 19:30:46,905 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 10 [2021-08-06 19:30:46,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:46,905 INFO L225 Difference]: With dead ends: 15 [2021-08-06 19:30:46,906 INFO L226 Difference]: Without dead ends: 15 [2021-08-06 19:30:46,906 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:30:46,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-06 19:30:46,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2021-08-06 19:30:46,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:46,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2021-08-06 19:30:46,912 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 10 [2021-08-06 19:30:46,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:46,912 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2021-08-06 19:30:46,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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) [2021-08-06 19:30:46,913 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2021-08-06 19:30:46,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-06 19:30:46,913 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:46,913 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:46,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:47,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:47,132 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:47,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:47,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1888938480, now seen corresponding path program 1 times [2021-08-06 19:30:47,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:47,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604004747] [2021-08-06 19:30:47,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:47,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:47,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:47,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:47,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:47,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604004747] [2021-08-06 19:30:47,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604004747] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:30:47,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:30:47,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:30:47,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777244017] [2021-08-06 19:30:47,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 19:30:47,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:47,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 19:30:47,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 19:30:47,177 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:47,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:47,193 INFO L93 Difference]: Finished difference Result 15 states and 22 transitions. [2021-08-06 19:30:47,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 19:30:47,193 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-06 19:30:47,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:47,194 INFO L225 Difference]: With dead ends: 15 [2021-08-06 19:30:47,194 INFO L226 Difference]: Without dead ends: 14 [2021-08-06 19:30:47,194 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:30:47,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-08-06 19:30:47,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-08-06 19:30:47,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 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) [2021-08-06 19:30:47,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 21 transitions. [2021-08-06 19:30:47,197 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 21 transitions. Word has length 10 [2021-08-06 19:30:47,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:47,197 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 21 transitions. [2021-08-06 19:30:47,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:47,197 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 21 transitions. [2021-08-06 19:30:47,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-06 19:30:47,198 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:47,198 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:47,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 19:30:47,199 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:47,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:47,200 INFO L82 PathProgramCache]: Analyzing trace with hash 170594774, now seen corresponding path program 2 times [2021-08-06 19:30:47,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:47,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562958244] [2021-08-06 19:30:47,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:47,200 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:47,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:47,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:47,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562958244] [2021-08-06 19:30:47,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562958244] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:30:47,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:30:47,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:30:47,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429378529] [2021-08-06 19:30:47,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 19:30:47,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:47,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 19:30:47,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 19:30:47,242 INFO L87 Difference]: Start difference. First operand 14 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:47,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:47,258 INFO L93 Difference]: Finished difference Result 15 states and 23 transitions. [2021-08-06 19:30:47,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 19:30:47,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-06 19:30:47,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:47,259 INFO L225 Difference]: With dead ends: 15 [2021-08-06 19:30:47,259 INFO L226 Difference]: Without dead ends: 15 [2021-08-06 19:30:47,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 19:30:47,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-06 19:30:47,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-08-06 19:30:47,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:47,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 23 transitions. [2021-08-06 19:30:47,262 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 23 transitions. Word has length 10 [2021-08-06 19:30:47,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:47,262 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 23 transitions. [2021-08-06 19:30:47,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:47,263 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 23 transitions. [2021-08-06 19:30:47,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-06 19:30:47,263 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:47,263 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:47,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 19:30:47,263 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:47,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:47,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1652645061, now seen corresponding path program 1 times [2021-08-06 19:30:47,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:47,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352134444] [2021-08-06 19:30:47,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:47,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:47,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:47,308 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:30:47,312 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:30:47,326 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:30:47,329 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:30:47,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:47,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:47,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352134444] [2021-08-06 19:30:47,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352134444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:47,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26800075] [2021-08-06 19:30:47,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:47,336 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:47,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:47,336 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:47,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 19:30:47,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:47,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:30:47,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:47,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:47,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26800075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:47,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:47,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-06 19:30:47,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972637437] [2021-08-06 19:30:47,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 19:30:47,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:47,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 19:30:47,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 19:30:47,450 INFO L87 Difference]: Start difference. First operand 15 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.75) 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) [2021-08-06 19:30:47,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:47,459 INFO L93 Difference]: Finished difference Result 18 states and 29 transitions. [2021-08-06 19:30:47,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 19:30:47,460 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) 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 [2021-08-06 19:30:47,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:47,460 INFO L225 Difference]: With dead ends: 18 [2021-08-06 19:30:47,460 INFO L226 Difference]: Without dead ends: 18 [2021-08-06 19:30:47,460 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 19:30:47,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-06 19:30:47,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-08-06 19:30:47,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:47,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 29 transitions. [2021-08-06 19:30:47,462 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 29 transitions. Word has length 11 [2021-08-06 19:30:47,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:47,462 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 29 transitions. [2021-08-06 19:30:47,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) 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) [2021-08-06 19:30:47,462 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 29 transitions. [2021-08-06 19:30:47,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-06 19:30:47,463 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:47,463 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:47,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:47,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:47,679 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:47,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:47,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1377483632, now seen corresponding path program 2 times [2021-08-06 19:30:47,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:47,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757337171] [2021-08-06 19:30:47,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:47,680 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:47,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:47,722 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:30:47,724 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:30:47,739 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:30:47,740 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:30:47,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:47,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:47,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757337171] [2021-08-06 19:30:47,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757337171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:47,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047846516] [2021-08-06 19:30:47,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:30:47,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:47,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:47,746 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:47,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 19:30:47,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:30:47,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:47,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 19:30:47,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:47,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:47,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047846516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:47,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:47,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-06 19:30:47,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118309581] [2021-08-06 19:30:47,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 19:30:47,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:47,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 19:30:47,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:30:47,863 INFO L87 Difference]: Start difference. First operand 18 states and 29 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:47,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:47,877 INFO L93 Difference]: Finished difference Result 21 states and 35 transitions. [2021-08-06 19:30:47,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 19:30:47,877 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-06 19:30:47,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:47,878 INFO L225 Difference]: With dead ends: 21 [2021-08-06 19:30:47,878 INFO L226 Difference]: Without dead ends: 21 [2021-08-06 19:30:47,878 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:30:47,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-06 19:30:47,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-08-06 19:30:47,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:47,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 35 transitions. [2021-08-06 19:30:47,880 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 35 transitions. Word has length 12 [2021-08-06 19:30:47,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:47,880 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 35 transitions. [2021-08-06 19:30:47,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:47,880 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 35 transitions. [2021-08-06 19:30:47,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 19:30:47,881 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:47,881 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:47,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:48,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:48,097 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:48,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:48,098 INFO L82 PathProgramCache]: Analyzing trace with hash -822192603, now seen corresponding path program 3 times [2021-08-06 19:30:48,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:48,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279252299] [2021-08-06 19:30:48,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:48,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:48,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:48,150 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:30:48,152 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:30:48,161 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:30:48,161 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:30:48,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:48,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:48,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279252299] [2021-08-06 19:30:48,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279252299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:48,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490978064] [2021-08-06 19:30:48,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:30:48,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:48,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:48,166 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:48,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 19:30:48,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 19:30:48,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:48,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:30:48,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:48,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490978064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:48,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:48,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-06 19:30:48,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619618712] [2021-08-06 19:30:48,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:30:48,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:48,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:30:48,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:30:48,300 INFO L87 Difference]: Start difference. First operand 21 states and 35 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:48,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:48,322 INFO L93 Difference]: Finished difference Result 24 states and 41 transitions. [2021-08-06 19:30:48,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 19:30:48,323 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-06 19:30:48,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:48,323 INFO L225 Difference]: With dead ends: 24 [2021-08-06 19:30:48,323 INFO L226 Difference]: Without dead ends: 24 [2021-08-06 19:30:48,323 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:30:48,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-06 19:30:48,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-06 19:30:48,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 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) [2021-08-06 19:30:48,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 41 transitions. [2021-08-06 19:30:48,325 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 41 transitions. Word has length 13 [2021-08-06 19:30:48,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:48,325 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 41 transitions. [2021-08-06 19:30:48,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:48,325 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 41 transitions. [2021-08-06 19:30:48,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 19:30:48,326 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:48,326 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:48,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:48,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:48,543 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:48,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:48,543 INFO L82 PathProgramCache]: Analyzing trace with hash -788039888, now seen corresponding path program 4 times [2021-08-06 19:30:48,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:48,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030167343] [2021-08-06 19:30:48,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:48,543 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:48,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:48,582 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:48,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:48,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030167343] [2021-08-06 19:30:48,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030167343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:48,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461555446] [2021-08-06 19:30:48,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:30:48,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:48,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:48,583 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:48,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 19:30:48,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:30:48,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:48,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 19:30:48,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:48,767 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:30:48,767 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-06 19:30:48,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:48,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461555446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:48,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:48,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-08-06 19:30:48,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040778469] [2021-08-06 19:30:48,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:30:48,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:48,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:30:48,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:30:48,831 INFO L87 Difference]: Start difference. First operand 24 states and 41 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:48,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:48,875 INFO L93 Difference]: Finished difference Result 60 states and 90 transitions. [2021-08-06 19:30:48,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:30:48,876 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-06 19:30:48,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:48,876 INFO L225 Difference]: With dead ends: 60 [2021-08-06 19:30:48,876 INFO L226 Difference]: Without dead ends: 57 [2021-08-06 19:30:48,877 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:30:48,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-06 19:30:48,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 33. [2021-08-06 19:30:48,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 32 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) [2021-08-06 19:30:48,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 64 transitions. [2021-08-06 19:30:48,879 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 64 transitions. Word has length 14 [2021-08-06 19:30:48,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:48,880 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 64 transitions. [2021-08-06 19:30:48,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:48,880 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 64 transitions. [2021-08-06 19:30:48,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 19:30:48,880 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:48,880 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:48,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:49,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:49,097 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:49,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:49,097 INFO L82 PathProgramCache]: Analyzing trace with hash -622522594, now seen corresponding path program 5 times [2021-08-06 19:30:49,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:49,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185050652] [2021-08-06 19:30:49,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:49,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:49,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:49,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:49,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185050652] [2021-08-06 19:30:49,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185050652] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:49,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978224628] [2021-08-06 19:30:49,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:30:49,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:49,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:49,136 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:49,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 19:30:49,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 19:30:49,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:49,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 19:30:49,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:49,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:30:49,299 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-06 19:30:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:49,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978224628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:49,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:49,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-08-06 19:30:49,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187495306] [2021-08-06 19:30:49,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:30:49,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:49,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:30:49,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:30:49,371 INFO L87 Difference]: Start difference. First operand 33 states and 64 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:49,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:49,425 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2021-08-06 19:30:49,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:30:49,425 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-06 19:30:49,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:49,426 INFO L225 Difference]: With dead ends: 67 [2021-08-06 19:30:49,426 INFO L226 Difference]: Without dead ends: 64 [2021-08-06 19:30:49,426 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:30:49,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-06 19:30:49,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 39. [2021-08-06 19:30:49,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:49,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 81 transitions. [2021-08-06 19:30:49,429 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 81 transitions. Word has length 14 [2021-08-06 19:30:49,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:49,429 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 81 transitions. [2021-08-06 19:30:49,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:49,429 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 81 transitions. [2021-08-06 19:30:49,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 19:30:49,429 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:49,429 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:49,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:49,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:49,646 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:49,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:49,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1942593558, now seen corresponding path program 6 times [2021-08-06 19:30:49,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:49,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898926621] [2021-08-06 19:30:49,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:49,647 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:49,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:49,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:49,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:49,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898926621] [2021-08-06 19:30:49,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898926621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:49,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421910735] [2021-08-06 19:30:49,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:30:49,698 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:49,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:49,699 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:49,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 19:30:49,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 19:30:49,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:49,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 19:30:49,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:49,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:30:49,893 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-06 19:30:49,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:49,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421910735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:49,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:49,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-08-06 19:30:49,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636782297] [2021-08-06 19:30:49,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:30:49,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:49,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:30:49,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:30:49,990 INFO L87 Difference]: Start difference. First operand 39 states and 81 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:50,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:50,038 INFO L93 Difference]: Finished difference Result 74 states and 128 transitions. [2021-08-06 19:30:50,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:30:50,039 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-06 19:30:50,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:50,039 INFO L225 Difference]: With dead ends: 74 [2021-08-06 19:30:50,039 INFO L226 Difference]: Without dead ends: 71 [2021-08-06 19:30:50,040 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:30:50,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-08-06 19:30:50,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2021-08-06 19:30:50,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.2222222222222223) internal successors, (100), 45 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:50,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 100 transitions. [2021-08-06 19:30:50,043 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 100 transitions. Word has length 14 [2021-08-06 19:30:50,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:50,043 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 100 transitions. [2021-08-06 19:30:50,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:50,043 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 100 transitions. [2021-08-06 19:30:50,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 19:30:50,044 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:50,044 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:50,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:50,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:50,260 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:50,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:50,261 INFO L82 PathProgramCache]: Analyzing trace with hash -143184354, now seen corresponding path program 7 times [2021-08-06 19:30:50,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:50,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797228540] [2021-08-06 19:30:50,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:50,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:50,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:50,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:50,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797228540] [2021-08-06 19:30:50,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797228540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:50,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453556968] [2021-08-06 19:30:50,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:30:50,296 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:50,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:50,310 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:50,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 19:30:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:50,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 19:30:50,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:50,493 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:30:50,493 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-06 19:30:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:50,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453556968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:50,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:50,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-08-06 19:30:50,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776145898] [2021-08-06 19:30:50,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:30:50,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:50,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:30:50,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:30:50,579 INFO L87 Difference]: Start difference. First operand 46 states and 100 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:50,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:50,632 INFO L93 Difference]: Finished difference Result 82 states and 149 transitions. [2021-08-06 19:30:50,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:30:50,632 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-06 19:30:50,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:50,633 INFO L225 Difference]: With dead ends: 82 [2021-08-06 19:30:50,633 INFO L226 Difference]: Without dead ends: 79 [2021-08-06 19:30:50,633 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:30:50,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-06 19:30:50,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 54. [2021-08-06 19:30:50,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:50,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 121 transitions. [2021-08-06 19:30:50,636 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 121 transitions. Word has length 14 [2021-08-06 19:30:50,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:50,636 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 121 transitions. [2021-08-06 19:30:50,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:50,637 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 121 transitions. [2021-08-06 19:30:50,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 19:30:50,637 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:50,637 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:50,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-08-06 19:30:50,853 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,SelfDestructingSolverStorable10 [2021-08-06 19:30:50,853 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:50,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:50,854 INFO L82 PathProgramCache]: Analyzing trace with hash -377790186, now seen corresponding path program 8 times [2021-08-06 19:30:50,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:50,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180075685] [2021-08-06 19:30:50,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:50,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:50,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:50,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:50,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:50,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180075685] [2021-08-06 19:30:50,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180075685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:50,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759618624] [2021-08-06 19:30:50,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:30:50,889 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:50,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:50,889 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:50,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 19:30:50,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:30:50,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:50,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 19:30:50,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:51,069 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:30:51,069 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-06 19:30:51,170 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:51,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759618624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:51,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:51,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-08-06 19:30:51,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806765522] [2021-08-06 19:30:51,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:30:51,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:51,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:30:51,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:30:51,171 INFO L87 Difference]: Start difference. First operand 54 states and 121 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:51,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:51,235 INFO L93 Difference]: Finished difference Result 91 states and 172 transitions. [2021-08-06 19:30:51,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:30:51,235 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-06 19:30:51,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:51,236 INFO L225 Difference]: With dead ends: 91 [2021-08-06 19:30:51,236 INFO L226 Difference]: Without dead ends: 88 [2021-08-06 19:30:51,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:30:51,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-06 19:30:51,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2021-08-06 19:30:51,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.3225806451612905) internal successors, (144), 62 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:51,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 144 transitions. [2021-08-06 19:30:51,250 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 144 transitions. Word has length 14 [2021-08-06 19:30:51,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:51,251 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 144 transitions. [2021-08-06 19:30:51,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:51,251 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 144 transitions. [2021-08-06 19:30:51,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:30:51,252 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:51,252 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:51,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-08-06 19:30:51,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:51,465 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:51,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:51,465 INFO L82 PathProgramCache]: Analyzing trace with hash 270694277, now seen corresponding path program 9 times [2021-08-06 19:30:51,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:51,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644294553] [2021-08-06 19:30:51,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:51,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:51,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:51,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644294553] [2021-08-06 19:30:51,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644294553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:51,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829918805] [2021-08-06 19:30:51,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:30:51,517 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:51,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:51,537 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:51,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 19:30:51,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:30:51,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:51,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:30:51,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:51,714 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:30:51,715 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:30:51,727 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:51,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829918805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:51,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:51,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-06 19:30:51,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147504305] [2021-08-06 19:30:51,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:30:51,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:51,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:30:51,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:30:51,729 INFO L87 Difference]: Start difference. First operand 63 states and 144 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:51,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:51,812 INFO L93 Difference]: Finished difference Result 84 states and 178 transitions. [2021-08-06 19:30:51,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:30:51,813 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:30:51,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:51,813 INFO L225 Difference]: With dead ends: 84 [2021-08-06 19:30:51,813 INFO L226 Difference]: Without dead ends: 84 [2021-08-06 19:30:51,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:30:51,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-06 19:30:51,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 67. [2021-08-06 19:30:51,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.378787878787879) internal successors, (157), 66 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:51,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 157 transitions. [2021-08-06 19:30:51,817 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 157 transitions. Word has length 15 [2021-08-06 19:30:51,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:51,818 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 157 transitions. [2021-08-06 19:30:51,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:51,818 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 157 transitions. [2021-08-06 19:30:51,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:30:51,818 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:51,818 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:51,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:52,034 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,SelfDestructingSolverStorable12 [2021-08-06 19:30:52,034 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:52,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:52,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1363642677, now seen corresponding path program 10 times [2021-08-06 19:30:52,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:52,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813997781] [2021-08-06 19:30:52,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:52,035 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:52,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:52,091 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:52,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:52,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813997781] [2021-08-06 19:30:52,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813997781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:52,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550744581] [2021-08-06 19:30:52,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:30:52,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:52,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:52,109 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:52,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 19:30:52,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:30:52,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:52,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:30:52,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:52,284 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:30:52,284 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:30:52,299 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:52,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550744581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:52,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:52,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-06 19:30:52,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122256497] [2021-08-06 19:30:52,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:30:52,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:52,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:30:52,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:30:52,301 INFO L87 Difference]: Start difference. First operand 67 states and 157 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:52,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:52,398 INFO L93 Difference]: Finished difference Result 114 states and 218 transitions. [2021-08-06 19:30:52,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:30:52,398 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:30:52,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:52,399 INFO L225 Difference]: With dead ends: 114 [2021-08-06 19:30:52,399 INFO L226 Difference]: Without dead ends: 112 [2021-08-06 19:30:52,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:30:52,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-08-06 19:30:52,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2021-08-06 19:30:52,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.325) internal successors, (186), 80 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:52,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 186 transitions. [2021-08-06 19:30:52,403 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 186 transitions. Word has length 15 [2021-08-06 19:30:52,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:52,403 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 186 transitions. [2021-08-06 19:30:52,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:52,403 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 186 transitions. [2021-08-06 19:30:52,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:30:52,404 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:52,404 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:52,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:52,620 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,SelfDestructingSolverStorable13 [2021-08-06 19:30:52,621 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:52,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:52,621 INFO L82 PathProgramCache]: Analyzing trace with hash -2083748363, now seen corresponding path program 11 times [2021-08-06 19:30:52,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:52,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50971288] [2021-08-06 19:30:52,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:52,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:52,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:52,686 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:52,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:52,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50971288] [2021-08-06 19:30:52,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50971288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:52,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266956332] [2021-08-06 19:30:52,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:30:52,686 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:52,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:52,692 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:52,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 19:30:52,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 19:30:52,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:52,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:30:52,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:52,887 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:30:52,887 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:30:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:52,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266956332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:52,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:52,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:30:52,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538763892] [2021-08-06 19:30:52,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:30:52,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:52,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:30:52,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:30:52,903 INFO L87 Difference]: Start difference. First operand 81 states and 186 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:52,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:52,952 INFO L93 Difference]: Finished difference Result 116 states and 223 transitions. [2021-08-06 19:30:52,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:30:52,952 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:30:52,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:52,952 INFO L225 Difference]: With dead ends: 116 [2021-08-06 19:30:52,953 INFO L226 Difference]: Without dead ends: 116 [2021-08-06 19:30:52,953 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:30:52,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-08-06 19:30:52,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 81. [2021-08-06 19:30:52,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.325) internal successors, (186), 80 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:52,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 186 transitions. [2021-08-06 19:30:52,955 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 186 transitions. Word has length 15 [2021-08-06 19:30:52,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:52,955 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 186 transitions. [2021-08-06 19:30:52,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:52,955 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 186 transitions. [2021-08-06 19:30:52,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:30:52,956 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:52,956 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:52,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:53,185 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,SelfDestructingSolverStorable14 [2021-08-06 19:30:53,185 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:53,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:53,186 INFO L82 PathProgramCache]: Analyzing trace with hash -2095255801, now seen corresponding path program 12 times [2021-08-06 19:30:53,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:53,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498959371] [2021-08-06 19:30:53,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:53,186 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:53,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:53,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:53,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498959371] [2021-08-06 19:30:53,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498959371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:53,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507120550] [2021-08-06 19:30:53,242 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:30:53,243 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:53,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:53,249 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:53,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 19:30:53,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 19:30:53,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:53,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:30:53,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:53,421 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:30:53,422 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:30:53,442 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:53,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507120550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:53,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:53,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:30:53,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705605595] [2021-08-06 19:30:53,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:30:53,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:53,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:30:53,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:30:53,444 INFO L87 Difference]: Start difference. First operand 81 states and 186 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:53,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:53,514 INFO L93 Difference]: Finished difference Result 122 states and 235 transitions. [2021-08-06 19:30:53,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:30:53,514 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:30:53,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:53,515 INFO L225 Difference]: With dead ends: 122 [2021-08-06 19:30:53,515 INFO L226 Difference]: Without dead ends: 121 [2021-08-06 19:30:53,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:30:53,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-08-06 19:30:53,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 87. [2021-08-06 19:30:53,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.3488372093023258) internal successors, (202), 86 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:53,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 202 transitions. [2021-08-06 19:30:53,518 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 202 transitions. Word has length 15 [2021-08-06 19:30:53,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:53,518 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 202 transitions. [2021-08-06 19:30:53,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:53,518 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 202 transitions. [2021-08-06 19:30:53,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:30:53,519 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:53,519 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:53,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:53,736 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,SelfDestructingSolverStorable15 [2021-08-06 19:30:53,736 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:53,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:53,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1293639573, now seen corresponding path program 13 times [2021-08-06 19:30:53,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:53,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12566907] [2021-08-06 19:30:53,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:53,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:53,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:53,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:53,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12566907] [2021-08-06 19:30:53,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12566907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:53,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152553692] [2021-08-06 19:30:53,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:30:53,790 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:53,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:53,791 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:53,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 19:30:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:53,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:30:53,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:53,990 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:30:53,991 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:30:54,002 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:54,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152553692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:54,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:54,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:30:54,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244260260] [2021-08-06 19:30:54,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:30:54,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:54,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:30:54,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:30:54,003 INFO L87 Difference]: Start difference. First operand 87 states and 202 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:54,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:54,054 INFO L93 Difference]: Finished difference Result 118 states and 243 transitions. [2021-08-06 19:30:54,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:30:54,055 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:30:54,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:54,056 INFO L225 Difference]: With dead ends: 118 [2021-08-06 19:30:54,056 INFO L226 Difference]: Without dead ends: 118 [2021-08-06 19:30:54,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:30:54,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-08-06 19:30:54,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 92. [2021-08-06 19:30:54,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.3846153846153846) internal successors, (217), 91 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:54,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 217 transitions. [2021-08-06 19:30:54,058 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 217 transitions. Word has length 15 [2021-08-06 19:30:54,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:54,059 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 217 transitions. [2021-08-06 19:30:54,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:54,059 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 217 transitions. [2021-08-06 19:30:54,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:30:54,059 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:54,059 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:54,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:54,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:54,276 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:54,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:54,277 INFO L82 PathProgramCache]: Analyzing trace with hash 481367789, now seen corresponding path program 14 times [2021-08-06 19:30:54,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:54,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951689902] [2021-08-06 19:30:54,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:54,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:54,326 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:54,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:54,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951689902] [2021-08-06 19:30:54,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951689902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:54,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685169281] [2021-08-06 19:30:54,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:30:54,327 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:54,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:54,327 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:54,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 19:30:54,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:30:54,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:54,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:30:54,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:54,516 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:30:54,516 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:30:54,555 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:54,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685169281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:54,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:54,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:30:54,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913358933] [2021-08-06 19:30:54,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:30:54,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:54,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:30:54,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:30:54,556 INFO L87 Difference]: Start difference. First operand 92 states and 217 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:54,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:54,597 INFO L93 Difference]: Finished difference Result 128 states and 254 transitions. [2021-08-06 19:30:54,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:30:54,598 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:30:54,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:54,599 INFO L225 Difference]: With dead ends: 128 [2021-08-06 19:30:54,599 INFO L226 Difference]: Without dead ends: 128 [2021-08-06 19:30:54,599 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:30:54,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-08-06 19:30:54,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 92. [2021-08-06 19:30:54,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.3846153846153846) internal successors, (217), 91 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:54,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 217 transitions. [2021-08-06 19:30:54,601 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 217 transitions. Word has length 15 [2021-08-06 19:30:54,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:54,601 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 217 transitions. [2021-08-06 19:30:54,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:54,601 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 217 transitions. [2021-08-06 19:30:54,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:30:54,602 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:54,602 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:54,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-06 19:30:54,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-06 19:30:54,822 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:54,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:54,822 INFO L82 PathProgramCache]: Analyzing trace with hash -2102986199, now seen corresponding path program 15 times [2021-08-06 19:30:54,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:54,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564012438] [2021-08-06 19:30:54,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:54,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:54,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:54,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564012438] [2021-08-06 19:30:54,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564012438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:54,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235442762] [2021-08-06 19:30:54,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:30:54,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:54,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:54,881 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:54,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 19:30:54,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:30:54,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:54,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:30:54,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:55,027 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:30:55,028 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:30:55,042 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:55,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235442762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:55,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:55,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-06 19:30:55,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841393946] [2021-08-06 19:30:55,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:30:55,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:55,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:30:55,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:30:55,044 INFO L87 Difference]: Start difference. First operand 92 states and 217 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:55,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:55,097 INFO L93 Difference]: Finished difference Result 133 states and 264 transitions. [2021-08-06 19:30:55,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:30:55,098 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:30:55,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:55,098 INFO L225 Difference]: With dead ends: 133 [2021-08-06 19:30:55,098 INFO L226 Difference]: Without dead ends: 133 [2021-08-06 19:30:55,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:30:55,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-08-06 19:30:55,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 92. [2021-08-06 19:30:55,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.3846153846153846) internal successors, (217), 91 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:55,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 217 transitions. [2021-08-06 19:30:55,101 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 217 transitions. Word has length 15 [2021-08-06 19:30:55,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:55,102 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 217 transitions. [2021-08-06 19:30:55,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:55,102 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 217 transitions. [2021-08-06 19:30:55,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:30:55,102 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:55,102 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:55,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:55,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:55,303 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:55,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:55,303 INFO L82 PathProgramCache]: Analyzing trace with hash 113933583, now seen corresponding path program 16 times [2021-08-06 19:30:55,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:55,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728645179] [2021-08-06 19:30:55,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:55,304 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:55,347 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:55,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:55,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728645179] [2021-08-06 19:30:55,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728645179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:55,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487917108] [2021-08-06 19:30:55,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:30:55,348 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:55,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:55,348 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:55,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 19:30:55,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:30:55,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:55,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:30:55,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:55,498 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:30:55,498 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:30:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:55,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487917108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:55,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:55,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:30:55,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030504185] [2021-08-06 19:30:55,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:30:55,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:55,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:30:55,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:30:55,514 INFO L87 Difference]: Start difference. First operand 92 states and 217 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:55,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:55,563 INFO L93 Difference]: Finished difference Result 134 states and 268 transitions. [2021-08-06 19:30:55,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:30:55,578 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:30:55,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:55,579 INFO L225 Difference]: With dead ends: 134 [2021-08-06 19:30:55,579 INFO L226 Difference]: Without dead ends: 133 [2021-08-06 19:30:55,579 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:30:55,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-08-06 19:30:55,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 100. [2021-08-06 19:30:55,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.393939393939394) internal successors, (237), 99 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:55,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 237 transitions. [2021-08-06 19:30:55,582 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 237 transitions. Word has length 15 [2021-08-06 19:30:55,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:55,582 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 237 transitions. [2021-08-06 19:30:55,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:55,582 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 237 transitions. [2021-08-06 19:30:55,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:30:55,582 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:55,582 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:55,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:55,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:55,799 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:55,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:55,799 INFO L82 PathProgramCache]: Analyzing trace with hash 915549811, now seen corresponding path program 17 times [2021-08-06 19:30:55,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:55,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400870640] [2021-08-06 19:30:55,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:55,799 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:55,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:55,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:55,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400870640] [2021-08-06 19:30:55,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400870640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:55,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250054545] [2021-08-06 19:30:55,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:30:55,839 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:55,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:55,840 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:55,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 19:30:55,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:30:55,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:55,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:30:55,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:56,023 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:30:56,023 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:30:56,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:56,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250054545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:56,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:56,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:30:56,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308793188] [2021-08-06 19:30:56,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:30:56,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:56,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:30:56,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:30:56,037 INFO L87 Difference]: Start difference. First operand 100 states and 237 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:56,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:56,074 INFO L93 Difference]: Finished difference Result 137 states and 284 transitions. [2021-08-06 19:30:56,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:30:56,074 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:30:56,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:56,075 INFO L225 Difference]: With dead ends: 137 [2021-08-06 19:30:56,075 INFO L226 Difference]: Without dead ends: 137 [2021-08-06 19:30:56,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:30:56,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-08-06 19:30:56,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 105. [2021-08-06 19:30:56,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.423076923076923) internal successors, (252), 104 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:56,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 252 transitions. [2021-08-06 19:30:56,078 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 252 transitions. Word has length 15 [2021-08-06 19:30:56,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:56,078 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 252 transitions. [2021-08-06 19:30:56,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:56,078 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 252 transitions. [2021-08-06 19:30:56,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:30:56,078 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:56,078 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:56,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:56,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:56,283 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:56,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:56,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1604410123, now seen corresponding path program 18 times [2021-08-06 19:30:56,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:56,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828584790] [2021-08-06 19:30:56,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:56,283 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:56,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:56,325 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:56,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:56,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828584790] [2021-08-06 19:30:56,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828584790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:56,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095735079] [2021-08-06 19:30:56,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:30:56,326 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:56,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:56,327 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:56,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 19:30:56,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 19:30:56,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:56,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:30:56,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:56,492 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:30:56,493 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:30:56,507 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:56,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095735079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:56,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:56,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:30:56,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455716599] [2021-08-06 19:30:56,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:30:56,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:56,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:30:56,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:30:56,508 INFO L87 Difference]: Start difference. First operand 105 states and 252 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:56,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:56,539 INFO L93 Difference]: Finished difference Result 139 states and 285 transitions. [2021-08-06 19:30:56,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:30:56,539 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:30:56,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:56,540 INFO L225 Difference]: With dead ends: 139 [2021-08-06 19:30:56,540 INFO L226 Difference]: Without dead ends: 139 [2021-08-06 19:30:56,540 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:30:56,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-08-06 19:30:56,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 105. [2021-08-06 19:30:56,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.423076923076923) internal successors, (252), 104 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:56,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 252 transitions. [2021-08-06 19:30:56,542 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 252 transitions. Word has length 15 [2021-08-06 19:30:56,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:56,543 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 252 transitions. [2021-08-06 19:30:56,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:56,543 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 252 transitions. [2021-08-06 19:30:56,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:30:56,543 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:56,543 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:56,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:56,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:56,751 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:56,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:56,752 INFO L82 PathProgramCache]: Analyzing trace with hash 106203185, now seen corresponding path program 19 times [2021-08-06 19:30:56,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:56,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034530033] [2021-08-06 19:30:56,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:56,752 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:56,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:56,811 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:56,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:56,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034530033] [2021-08-06 19:30:56,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034530033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:56,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49027457] [2021-08-06 19:30:56,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:30:56,812 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:56,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:56,812 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:56,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 19:30:56,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:56,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:30:56,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:56,994 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:30:56,994 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:30:57,008 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:57,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49027457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:57,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:57,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-06 19:30:57,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118573546] [2021-08-06 19:30:57,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:30:57,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:57,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:30:57,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:30:57,009 INFO L87 Difference]: Start difference. First operand 105 states and 252 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:57,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:57,060 INFO L93 Difference]: Finished difference Result 142 states and 291 transitions. [2021-08-06 19:30:57,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:30:57,060 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:30:57,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:57,061 INFO L225 Difference]: With dead ends: 142 [2021-08-06 19:30:57,061 INFO L226 Difference]: Without dead ends: 142 [2021-08-06 19:30:57,061 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:30:57,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-08-06 19:30:57,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 105. [2021-08-06 19:30:57,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.423076923076923) internal successors, (252), 104 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:57,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 252 transitions. [2021-08-06 19:30:57,063 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 252 transitions. Word has length 15 [2021-08-06 19:30:57,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:57,063 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 252 transitions. [2021-08-06 19:30:57,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:57,064 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 252 transitions. [2021-08-06 19:30:57,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:30:57,064 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:57,064 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:57,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:57,280 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,SelfDestructingSolverStorable22 [2021-08-06 19:30:57,281 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:57,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:57,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1595608181, now seen corresponding path program 20 times [2021-08-06 19:30:57,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:57,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013589808] [2021-08-06 19:30:57,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:57,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:57,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:57,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:57,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013589808] [2021-08-06 19:30:57,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013589808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:57,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348866802] [2021-08-06 19:30:57,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:30:57,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:57,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:57,325 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:57,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 19:30:57,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:30:57,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:57,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:30:57,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:57,502 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:30:57,503 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:30:57,517 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:57,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348866802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:57,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:57,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-06 19:30:57,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512443689] [2021-08-06 19:30:57,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:30:57,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:57,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:30:57,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:30:57,518 INFO L87 Difference]: Start difference. First operand 105 states and 252 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:57,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:57,591 INFO L93 Difference]: Finished difference Result 152 states and 324 transitions. [2021-08-06 19:30:57,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:30:57,591 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:30:57,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:57,592 INFO L225 Difference]: With dead ends: 152 [2021-08-06 19:30:57,592 INFO L226 Difference]: Without dead ends: 152 [2021-08-06 19:30:57,592 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:30:57,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-08-06 19:30:57,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 115. [2021-08-06 19:30:57,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.43859649122807) internal successors, (278), 114 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:57,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 278 transitions. [2021-08-06 19:30:57,594 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 278 transitions. Word has length 15 [2021-08-06 19:30:57,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:57,594 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 278 transitions. [2021-08-06 19:30:57,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:57,595 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 278 transitions. [2021-08-06 19:30:57,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:30:57,595 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:57,595 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:57,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:57,811 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,SelfDestructingSolverStorable23 [2021-08-06 19:30:57,811 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:57,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:57,812 INFO L82 PathProgramCache]: Analyzing trace with hash -120672249, now seen corresponding path program 21 times [2021-08-06 19:30:57,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:57,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579459979] [2021-08-06 19:30:57,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:57,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:57,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:57,870 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:57,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:57,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579459979] [2021-08-06 19:30:57,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579459979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:57,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720503794] [2021-08-06 19:30:57,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:30:57,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:57,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:57,872 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:57,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 19:30:57,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 19:30:57,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:57,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:30:57,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:58,022 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:30:58,022 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:30:58,037 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:58,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720503794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:58,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:58,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:30:58,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387183188] [2021-08-06 19:30:58,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:30:58,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:58,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:30:58,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:30:58,038 INFO L87 Difference]: Start difference. First operand 115 states and 278 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:58,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:58,090 INFO L93 Difference]: Finished difference Result 166 states and 351 transitions. [2021-08-06 19:30:58,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:30:58,090 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:30:58,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:58,091 INFO L225 Difference]: With dead ends: 166 [2021-08-06 19:30:58,091 INFO L226 Difference]: Without dead ends: 165 [2021-08-06 19:30:58,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:30:58,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-08-06 19:30:58,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 133. [2021-08-06 19:30:58,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.4318181818181817) internal successors, (321), 132 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:58,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 321 transitions. [2021-08-06 19:30:58,095 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 321 transitions. Word has length 15 [2021-08-06 19:30:58,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:58,095 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 321 transitions. [2021-08-06 19:30:58,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:58,095 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 321 transitions. [2021-08-06 19:30:58,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:30:58,096 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:58,096 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:58,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-06 19:30:58,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:58,312 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:58,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:58,313 INFO L82 PathProgramCache]: Analyzing trace with hash 680943979, now seen corresponding path program 22 times [2021-08-06 19:30:58,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:58,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748821194] [2021-08-06 19:30:58,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:58,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:58,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:58,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:58,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:58,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748821194] [2021-08-06 19:30:58,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748821194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:58,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61033590] [2021-08-06 19:30:58,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:30:58,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:58,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:58,365 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:58,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 19:30:58,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:30:58,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:58,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:30:58,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:58,558 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:30:58,559 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:30:58,570 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:58,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61033590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:58,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:58,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:30:58,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837074688] [2021-08-06 19:30:58,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:30:58,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:58,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:30:58,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:30:58,571 INFO L87 Difference]: Start difference. First operand 133 states and 321 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:58,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:58,602 INFO L93 Difference]: Finished difference Result 175 states and 373 transitions. [2021-08-06 19:30:58,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:30:58,602 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:30:58,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:58,603 INFO L225 Difference]: With dead ends: 175 [2021-08-06 19:30:58,603 INFO L226 Difference]: Without dead ends: 175 [2021-08-06 19:30:58,603 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:30:58,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-08-06 19:30:58,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 138. [2021-08-06 19:30:58,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.4525547445255476) internal successors, (336), 137 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:58,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 336 transitions. [2021-08-06 19:30:58,606 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 336 transitions. Word has length 15 [2021-08-06 19:30:58,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:58,606 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 336 transitions. [2021-08-06 19:30:58,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:58,607 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 336 transitions. [2021-08-06 19:30:58,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:30:58,607 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:58,607 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:58,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:58,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:58,824 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:58,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:58,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1839015955, now seen corresponding path program 23 times [2021-08-06 19:30:58,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:58,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508150148] [2021-08-06 19:30:58,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:58,824 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:58,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:58,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:58,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508150148] [2021-08-06 19:30:58,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508150148] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:58,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659881740] [2021-08-06 19:30:58,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:30:58,882 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:58,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:58,883 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:58,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 19:30:59,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:30:59,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:59,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:30:59,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:59,057 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:30:59,058 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:30:59,073 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:59,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659881740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:59,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:59,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:30:59,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789929574] [2021-08-06 19:30:59,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:30:59,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:59,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:30:59,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:30:59,074 INFO L87 Difference]: Start difference. First operand 138 states and 336 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:59,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:59,101 INFO L93 Difference]: Finished difference Result 170 states and 364 transitions. [2021-08-06 19:30:59,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:30:59,102 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:30:59,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:59,102 INFO L225 Difference]: With dead ends: 170 [2021-08-06 19:30:59,102 INFO L226 Difference]: Without dead ends: 170 [2021-08-06 19:30:59,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:30:59,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-08-06 19:30:59,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 137. [2021-08-06 19:30:59,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.448529411764706) internal successors, (333), 136 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) [2021-08-06 19:30:59,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 333 transitions. [2021-08-06 19:30:59,105 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 333 transitions. Word has length 15 [2021-08-06 19:30:59,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:59,105 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 333 transitions. [2021-08-06 19:30:59,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:59,105 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 333 transitions. [2021-08-06 19:30:59,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:30:59,106 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:59,106 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:59,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:59,312 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,SelfDestructingSolverStorable26 [2021-08-06 19:30:59,312 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:59,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:59,312 INFO L82 PathProgramCache]: Analyzing trace with hash -128402647, now seen corresponding path program 24 times [2021-08-06 19:30:59,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:59,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392804624] [2021-08-06 19:30:59,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:59,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:59,366 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:59,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:59,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392804624] [2021-08-06 19:30:59,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392804624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:59,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832090368] [2021-08-06 19:30:59,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:30:59,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:59,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:59,367 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:59,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 19:30:59,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:30:59,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:59,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:30:59,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:59,561 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:30:59,562 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:30:59,576 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:59,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832090368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:59,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:59,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-06 19:30:59,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558210151] [2021-08-06 19:30:59,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:30:59,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:59,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:30:59,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:30:59,577 INFO L87 Difference]: Start difference. First operand 137 states and 333 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:59,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:59,631 INFO L93 Difference]: Finished difference Result 172 states and 368 transitions. [2021-08-06 19:30:59,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:30:59,631 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:30:59,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:59,632 INFO L225 Difference]: With dead ends: 172 [2021-08-06 19:30:59,632 INFO L226 Difference]: Without dead ends: 172 [2021-08-06 19:30:59,632 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:30:59,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-08-06 19:30:59,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 137. [2021-08-06 19:30:59,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.448529411764706) internal successors, (333), 136 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) [2021-08-06 19:30:59,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 333 transitions. [2021-08-06 19:30:59,634 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 333 transitions. Word has length 15 [2021-08-06 19:30:59,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:59,635 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 333 transitions. [2021-08-06 19:30:59,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:59,635 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 333 transitions. [2021-08-06 19:30:59,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:30:59,635 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:59,635 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:59,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:59,852 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,SelfDestructingSolverStorable27 [2021-08-06 19:30:59,852 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:59,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:59,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1361002349, now seen corresponding path program 25 times [2021-08-06 19:30:59,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:59,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065768875] [2021-08-06 19:30:59,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:59,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:59,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:59,897 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:59,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:59,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065768875] [2021-08-06 19:30:59,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065768875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:59,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854920211] [2021-08-06 19:30:59,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:30:59,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:59,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:59,898 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:59,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 19:31:00,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:00,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:31:00,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:00,104 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:00,105 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:00,119 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:00,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854920211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:00,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:00,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-06 19:31:00,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142317215] [2021-08-06 19:31:00,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:31:00,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:00,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:31:00,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:31:00,120 INFO L87 Difference]: Start difference. First operand 137 states and 333 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:00,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:00,175 INFO L93 Difference]: Finished difference Result 158 states and 354 transitions. [2021-08-06 19:31:00,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:31:00,176 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:31:00,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:00,176 INFO L225 Difference]: With dead ends: 158 [2021-08-06 19:31:00,176 INFO L226 Difference]: Without dead ends: 158 [2021-08-06 19:31:00,177 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:31:00,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-08-06 19:31:00,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 137. [2021-08-06 19:31:00,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.448529411764706) internal successors, (333), 136 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) [2021-08-06 19:31:00,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 333 transitions. [2021-08-06 19:31:00,179 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 333 transitions. Word has length 15 [2021-08-06 19:31:00,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:00,179 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 333 transitions. [2021-08-06 19:31:00,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:00,179 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 333 transitions. [2021-08-06 19:31:00,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:31:00,180 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:00,180 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:00,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:00,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-06 19:31:00,396 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:00,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:00,396 INFO L82 PathProgramCache]: Analyzing trace with hash 287916969, now seen corresponding path program 26 times [2021-08-06 19:31:00,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:00,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473356591] [2021-08-06 19:31:00,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:00,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:00,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:00,460 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:00,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:00,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473356591] [2021-08-06 19:31:00,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473356591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:00,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361128083] [2021-08-06 19:31:00,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:31:00,461 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:00,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:00,472 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:00,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 19:31:00,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:31:00,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:00,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:31:00,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:00,713 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:00,714 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:00,728 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:00,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361128083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:00,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:00,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-06 19:31:00,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70872521] [2021-08-06 19:31:00,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:31:00,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:00,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:31:00,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:31:00,729 INFO L87 Difference]: Start difference. First operand 137 states and 333 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:00,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:00,822 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2021-08-06 19:31:00,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:31:00,823 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:31:00,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:00,823 INFO L225 Difference]: With dead ends: 163 [2021-08-06 19:31:00,823 INFO L226 Difference]: Without dead ends: 163 [2021-08-06 19:31:00,824 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 103.8ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:31:00,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-08-06 19:31:00,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 143. [2021-08-06 19:31:00,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.436619718309859) internal successors, (346), 142 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:00,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 346 transitions. [2021-08-06 19:31:00,826 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 346 transitions. Word has length 15 [2021-08-06 19:31:00,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:00,827 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 346 transitions. [2021-08-06 19:31:00,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:00,827 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 346 transitions. [2021-08-06 19:31:00,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:31:00,827 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:00,827 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:00,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:01,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:01,041 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:01,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:01,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1196481551, now seen corresponding path program 27 times [2021-08-06 19:31:01,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:01,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600589393] [2021-08-06 19:31:01,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:01,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:01,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:01,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:01,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600589393] [2021-08-06 19:31:01,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600589393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:01,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671208755] [2021-08-06 19:31:01,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:31:01,087 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:01,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:01,088 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:01,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 19:31:01,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:31:01,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:01,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:31:01,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:01,334 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:31:01,334 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:31:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:01,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671208755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:01,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:01,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:31:01,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679402818] [2021-08-06 19:31:01,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:31:01,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:01,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:31:01,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:31:01,355 INFO L87 Difference]: Start difference. First operand 143 states and 346 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:01,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:01,421 INFO L93 Difference]: Finished difference Result 201 states and 434 transitions. [2021-08-06 19:31:01,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:31:01,421 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:31:01,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:01,422 INFO L225 Difference]: With dead ends: 201 [2021-08-06 19:31:01,422 INFO L226 Difference]: Without dead ends: 200 [2021-08-06 19:31:01,422 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:31:01,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-08-06 19:31:01,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 170. [2021-08-06 19:31:01,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.4142011834319526) internal successors, (408), 169 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:01,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 408 transitions. [2021-08-06 19:31:01,425 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 408 transitions. Word has length 15 [2021-08-06 19:31:01,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:01,425 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 408 transitions. [2021-08-06 19:31:01,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:01,426 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 408 transitions. [2021-08-06 19:31:01,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:31:01,426 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:01,426 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:01,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:01,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:01,641 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:01,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:01,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1998097779, now seen corresponding path program 28 times [2021-08-06 19:31:01,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:01,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860707277] [2021-08-06 19:31:01,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:01,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:01,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:01,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:01,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:01,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860707277] [2021-08-06 19:31:01,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860707277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:01,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344977224] [2021-08-06 19:31:01,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:31:01,684 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:01,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:01,685 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:01,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 19:31:01,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:31:01,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:01,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:31:01,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:01,892 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:01,892 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:01,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344977224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:01,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:01,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:31:01,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415805922] [2021-08-06 19:31:01,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:31:01,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:01,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:31:01,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:31:01,904 INFO L87 Difference]: Start difference. First operand 170 states and 408 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:01,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:01,938 INFO L93 Difference]: Finished difference Result 223 states and 480 transitions. [2021-08-06 19:31:01,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:31:01,939 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:31:01,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:01,940 INFO L225 Difference]: With dead ends: 223 [2021-08-06 19:31:01,940 INFO L226 Difference]: Without dead ends: 223 [2021-08-06 19:31:01,940 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:31:01,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-08-06 19:31:01,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 176. [2021-08-06 19:31:01,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.434285714285714) internal successors, (426), 175 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:01,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 426 transitions. [2021-08-06 19:31:01,943 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 426 transitions. Word has length 15 [2021-08-06 19:31:01,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:01,943 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 426 transitions. [2021-08-06 19:31:01,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:01,943 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 426 transitions. [2021-08-06 19:31:01,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:31:01,943 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:01,944 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:01,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:02,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:02,160 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:02,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:02,161 INFO L82 PathProgramCache]: Analyzing trace with hash -521862155, now seen corresponding path program 29 times [2021-08-06 19:31:02,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:02,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693874893] [2021-08-06 19:31:02,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:02,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:02,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:02,207 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:02,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:02,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693874893] [2021-08-06 19:31:02,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693874893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:02,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269527616] [2021-08-06 19:31:02,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:31:02,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:02,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:02,208 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:02,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 19:31:02,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:31:02,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:02,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:31:02,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:02,427 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:02,427 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:02,441 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:02,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269527616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:02,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:02,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:31:02,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395462025] [2021-08-06 19:31:02,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:31:02,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:02,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:31:02,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:31:02,442 INFO L87 Difference]: Start difference. First operand 176 states and 426 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:02,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:02,472 INFO L93 Difference]: Finished difference Result 200 states and 444 transitions. [2021-08-06 19:31:02,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:31:02,473 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:31:02,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:02,473 INFO L225 Difference]: With dead ends: 200 [2021-08-06 19:31:02,473 INFO L226 Difference]: Without dead ends: 200 [2021-08-06 19:31:02,474 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:31:02,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-08-06 19:31:02,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 175. [2021-08-06 19:31:02,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.425287356321839) internal successors, (422), 174 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:02,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 422 transitions. [2021-08-06 19:31:02,477 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 422 transitions. Word has length 15 [2021-08-06 19:31:02,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:02,477 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 422 transitions. [2021-08-06 19:31:02,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:02,477 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 422 transitions. [2021-08-06 19:31:02,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:31:02,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:02,477 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:02,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:02,694 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,SelfDestructingSolverStorable32 [2021-08-06 19:31:02,694 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:02,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:02,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1188751153, now seen corresponding path program 30 times [2021-08-06 19:31:02,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:02,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768557051] [2021-08-06 19:31:02,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:02,695 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:02,740 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:02,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:02,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768557051] [2021-08-06 19:31:02,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768557051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:02,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938865556] [2021-08-06 19:31:02,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:31:02,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:02,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:02,742 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:02,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 19:31:02,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:31:02,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:02,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:31:02,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:02,962 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:02,963 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:02,976 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:02,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938865556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:02,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:02,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-06 19:31:02,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720622213] [2021-08-06 19:31:02,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:31:02,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:02,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:31:02,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:31:02,977 INFO L87 Difference]: Start difference. First operand 175 states and 422 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:03,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:03,030 INFO L93 Difference]: Finished difference Result 201 states and 445 transitions. [2021-08-06 19:31:03,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:31:03,030 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:31:03,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:03,031 INFO L225 Difference]: With dead ends: 201 [2021-08-06 19:31:03,031 INFO L226 Difference]: Without dead ends: 201 [2021-08-06 19:31:03,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:31:03,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-08-06 19:31:03,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 173. [2021-08-06 19:31:03,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.4244186046511627) internal successors, (417), 172 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:03,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 417 transitions. [2021-08-06 19:31:03,034 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 417 transitions. Word has length 15 [2021-08-06 19:31:03,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:03,034 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 417 transitions. [2021-08-06 19:31:03,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:03,034 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 417 transitions. [2021-08-06 19:31:03,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:31:03,035 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:03,035 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:03,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:03,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:03,252 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:03,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:03,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811147, now seen corresponding path program 31 times [2021-08-06 19:31:03,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:03,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788092669] [2021-08-06 19:31:03,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:03,252 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:03,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:03,297 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:03,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:03,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788092669] [2021-08-06 19:31:03,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788092669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:03,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686703626] [2021-08-06 19:31:03,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:31:03,297 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:03,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:03,298 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:03,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 19:31:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:03,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:31:03,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:03,485 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:03,486 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:03,499 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:03,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686703626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:03,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:03,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-06 19:31:03,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634997789] [2021-08-06 19:31:03,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:31:03,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:03,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:31:03,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:31:03,500 INFO L87 Difference]: Start difference. First operand 173 states and 417 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:03,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:03,554 INFO L93 Difference]: Finished difference Result 188 states and 432 transitions. [2021-08-06 19:31:03,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:31:03,555 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:31:03,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:03,555 INFO L225 Difference]: With dead ends: 188 [2021-08-06 19:31:03,555 INFO L226 Difference]: Without dead ends: 188 [2021-08-06 19:31:03,555 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:31:03,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-08-06 19:31:03,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 170. [2021-08-06 19:31:03,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.42603550295858) internal successors, (410), 169 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:03,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 410 transitions. [2021-08-06 19:31:03,558 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 410 transitions. Word has length 15 [2021-08-06 19:31:03,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:03,558 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 410 transitions. [2021-08-06 19:31:03,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:03,559 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 410 transitions. [2021-08-06 19:31:03,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:31:03,559 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:03,559 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:03,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:03,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:03,774 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:03,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:03,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1605070769, now seen corresponding path program 32 times [2021-08-06 19:31:03,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:03,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902809477] [2021-08-06 19:31:03,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:03,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:03,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:03,821 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:03,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:03,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902809477] [2021-08-06 19:31:03,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902809477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:03,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980704256] [2021-08-06 19:31:03,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:31:03,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:03,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:03,822 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:03,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 19:31:04,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:31:04,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:04,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:31:04,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:04,052 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:04,052 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:04,066 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:04,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980704256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:04,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:04,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-06 19:31:04,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296650396] [2021-08-06 19:31:04,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:31:04,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:04,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:31:04,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:31:04,067 INFO L87 Difference]: Start difference. First operand 170 states and 410 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:04,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:04,126 INFO L93 Difference]: Finished difference Result 178 states and 426 transitions. [2021-08-06 19:31:04,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:31:04,127 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:31:04,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:04,127 INFO L225 Difference]: With dead ends: 178 [2021-08-06 19:31:04,127 INFO L226 Difference]: Without dead ends: 178 [2021-08-06 19:31:04,128 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 66.0ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:31:04,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-08-06 19:31:04,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 170. [2021-08-06 19:31:04,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.42603550295858) internal successors, (410), 169 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:04,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 410 transitions. [2021-08-06 19:31:04,130 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 410 transitions. Word has length 15 [2021-08-06 19:31:04,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:04,130 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 410 transitions. [2021-08-06 19:31:04,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:04,131 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 410 transitions. [2021-08-06 19:31:04,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:31:04,131 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:04,131 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:04,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:04,345 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,SelfDestructingSolverStorable35 [2021-08-06 19:31:04,345 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:04,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:04,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1595804939, now seen corresponding path program 33 times [2021-08-06 19:31:04,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:04,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709421003] [2021-08-06 19:31:04,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:04,346 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:04,404 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:04,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:04,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709421003] [2021-08-06 19:31:04,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709421003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:04,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37345842] [2021-08-06 19:31:04,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:31:04,405 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:04,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:04,405 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:04,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 19:31:04,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:31:04,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:04,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:31:04,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:04,651 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:04,652 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:04,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37345842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:04,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:04,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-06 19:31:04,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338234768] [2021-08-06 19:31:04,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:31:04,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:04,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:31:04,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:31:04,667 INFO L87 Difference]: Start difference. First operand 170 states and 410 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:04,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:04,757 INFO L93 Difference]: Finished difference Result 205 states and 480 transitions. [2021-08-06 19:31:04,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:31:04,757 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:31:04,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:04,758 INFO L225 Difference]: With dead ends: 205 [2021-08-06 19:31:04,758 INFO L226 Difference]: Without dead ends: 205 [2021-08-06 19:31:04,758 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:31:04,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-08-06 19:31:04,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 177. [2021-08-06 19:31:04,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.409090909090909) internal successors, (424), 176 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:04,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 424 transitions. [2021-08-06 19:31:04,761 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 424 transitions. Word has length 15 [2021-08-06 19:31:04,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:04,761 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 424 transitions. [2021-08-06 19:31:04,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:04,761 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 424 transitions. [2021-08-06 19:31:04,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 19:31:04,761 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:04,761 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:04,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:04,978 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,SelfDestructingSolverStorable36 [2021-08-06 19:31:04,978 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:04,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:04,978 INFO L82 PathProgramCache]: Analyzing trace with hash -175336576, now seen corresponding path program 34 times [2021-08-06 19:31:04,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:04,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912230187] [2021-08-06 19:31:04,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:04,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:04,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:05,047 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:31:05,048 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:31:05,059 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:31:05,060 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:31:05,063 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:31:05,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:05,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912230187] [2021-08-06 19:31:05,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912230187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:05,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538183242] [2021-08-06 19:31:05,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:31:05,063 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:05,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:05,064 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:05,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 19:31:05,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:31:05,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:05,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:31:05,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:05,370 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:31:05,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538183242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:05,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:05,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 19:31:05,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135565501] [2021-08-06 19:31:05,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:31:05,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:05,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:31:05,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:31:05,371 INFO L87 Difference]: Start difference. First operand 177 states and 424 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:05,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:05,413 INFO L93 Difference]: Finished difference Result 336 states and 741 transitions. [2021-08-06 19:31:05,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:31:05,413 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 19:31:05,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:05,414 INFO L225 Difference]: With dead ends: 336 [2021-08-06 19:31:05,414 INFO L226 Difference]: Without dead ends: 336 [2021-08-06 19:31:05,415 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:31:05,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-08-06 19:31:05,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 212. [2021-08-06 19:31:05,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.3364928909952605) internal successors, (493), 211 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:05,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 493 transitions. [2021-08-06 19:31:05,418 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 493 transitions. Word has length 16 [2021-08-06 19:31:05,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:05,418 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 493 transitions. [2021-08-06 19:31:05,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:05,419 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 493 transitions. [2021-08-06 19:31:05,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:31:05,419 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:05,419 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:05,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:05,632 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,SelfDestructingSolverStorable37 [2021-08-06 19:31:05,633 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:05,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:05,633 INFO L82 PathProgramCache]: Analyzing trace with hash -639053163, now seen corresponding path program 35 times [2021-08-06 19:31:05,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:05,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753575623] [2021-08-06 19:31:05,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:05,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:05,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:05,737 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:31:05,738 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:31:05,748 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:31:05,749 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:31:05,751 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:31:05,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:05,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753575623] [2021-08-06 19:31:05,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753575623] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:05,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53613618] [2021-08-06 19:31:05,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:31:05,752 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:05,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:05,753 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:05,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 19:31:05,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:31:05,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:05,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:31:05,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:06,029 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:31:06,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53613618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:06,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:06,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-06 19:31:06,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784020567] [2021-08-06 19:31:06,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:31:06,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:06,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:31:06,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:31:06,030 INFO L87 Difference]: Start difference. First operand 212 states and 493 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:06,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:06,100 INFO L93 Difference]: Finished difference Result 395 states and 859 transitions. [2021-08-06 19:31:06,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:31:06,100 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 17 [2021-08-06 19:31:06,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:06,102 INFO L225 Difference]: With dead ends: 395 [2021-08-06 19:31:06,102 INFO L226 Difference]: Without dead ends: 395 [2021-08-06 19:31:06,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:31:06,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-08-06 19:31:06,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 258. [2021-08-06 19:31:06,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.2762645914396886) internal successors, (585), 257 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:06,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 585 transitions. [2021-08-06 19:31:06,106 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 585 transitions. Word has length 17 [2021-08-06 19:31:06,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:06,106 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 585 transitions. [2021-08-06 19:31:06,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:06,106 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 585 transitions. [2021-08-06 19:31:06,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:31:06,107 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:06,107 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:06,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:06,323 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,SelfDestructingSolverStorable38 [2021-08-06 19:31:06,324 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:06,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:06,324 INFO L82 PathProgramCache]: Analyzing trace with hash -2129365472, now seen corresponding path program 36 times [2021-08-06 19:31:06,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:06,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095052246] [2021-08-06 19:31:06,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:06,324 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:06,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:06,425 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:31:06,426 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:31:06,439 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:31:06,439 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:31:06,442 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:31:06,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:06,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095052246] [2021-08-06 19:31:06,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095052246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:06,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266642635] [2021-08-06 19:31:06,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:31:06,442 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:06,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:06,443 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:06,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 19:31:06,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:31:06,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:06,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 19:31:06,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:31:06,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266642635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:06,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:06,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 19:31:06,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413315003] [2021-08-06 19:31:06,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:31:06,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:06,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:31:06,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:31:06,794 INFO L87 Difference]: Start difference. First operand 258 states and 585 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:06,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:06,888 INFO L93 Difference]: Finished difference Result 461 states and 991 transitions. [2021-08-06 19:31:06,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:31:06,888 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 19:31:06,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:06,889 INFO L225 Difference]: With dead ends: 461 [2021-08-06 19:31:06,889 INFO L226 Difference]: Without dead ends: 461 [2021-08-06 19:31:06,890 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 136.4ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:31:06,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-08-06 19:31:06,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 318. [2021-08-06 19:31:06,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.22397476340694) internal successors, (705), 317 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:06,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 705 transitions. [2021-08-06 19:31:06,894 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 705 transitions. Word has length 18 [2021-08-06 19:31:06,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:06,894 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 705 transitions. [2021-08-06 19:31:06,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:06,895 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 705 transitions. [2021-08-06 19:31:06,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 19:31:06,895 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:06,895 INFO L512 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:06,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:07,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-06 19:31:07,112 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:07,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:07,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1084406795, now seen corresponding path program 37 times [2021-08-06 19:31:07,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:07,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341905252] [2021-08-06 19:31:07,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:07,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:07,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:07,185 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:07,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:07,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341905252] [2021-08-06 19:31:07,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341905252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:07,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355220162] [2021-08-06 19:31:07,185 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:31:07,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:07,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:07,186 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:07,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 19:31:07,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:07,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 19:31:07,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:07,674 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:31:07,674 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 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-08-06 19:31:10,065 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:10,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355220162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:10,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:10,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-08-06 19:31:10,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318673947] [2021-08-06 19:31:10,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:31:10,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:10,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:31:10,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:31:10,066 INFO L87 Difference]: Start difference. First operand 318 states and 705 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:10,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:10,249 INFO L93 Difference]: Finished difference Result 427 states and 893 transitions. [2021-08-06 19:31:10,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:31:10,249 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 19:31:10,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:10,250 INFO L225 Difference]: With dead ends: 427 [2021-08-06 19:31:10,250 INFO L226 Difference]: Without dead ends: 424 [2021-08-06 19:31:10,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 159.4ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:31:10,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-08-06 19:31:10,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 360. [2021-08-06 19:31:10,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.2952646239554317) internal successors, (824), 359 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:10,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 824 transitions. [2021-08-06 19:31:10,255 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 824 transitions. Word has length 19 [2021-08-06 19:31:10,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:10,255 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 824 transitions. [2021-08-06 19:31:10,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:10,256 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 824 transitions. [2021-08-06 19:31:10,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 19:31:10,256 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:10,256 INFO L512 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:10,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:10,473 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,SelfDestructingSolverStorable40 [2021-08-06 19:31:10,473 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:10,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:10,473 INFO L82 PathProgramCache]: Analyzing trace with hash -256068375, now seen corresponding path program 38 times [2021-08-06 19:31:10,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:10,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831879491] [2021-08-06 19:31:10,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:10,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:10,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:10,537 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:10,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:10,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831879491] [2021-08-06 19:31:10,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831879491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:10,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416182031] [2021-08-06 19:31:10,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:31:10,538 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:10,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:10,538 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:10,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 19:31:10,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:31:10,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:10,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 19:31:10,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:11,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:31:11,122 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 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-08-06 19:31:13,849 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:13,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416182031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:13,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:13,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-08-06 19:31:13,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367776429] [2021-08-06 19:31:13,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:31:13,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:13,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:31:13,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:31:13,851 INFO L87 Difference]: Start difference. First operand 360 states and 824 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:14,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:14,070 INFO L93 Difference]: Finished difference Result 478 states and 1034 transitions. [2021-08-06 19:31:14,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:31:14,070 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 19:31:14,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:14,072 INFO L225 Difference]: With dead ends: 478 [2021-08-06 19:31:14,072 INFO L226 Difference]: Without dead ends: 475 [2021-08-06 19:31:14,072 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 153.8ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:31:14,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-08-06 19:31:14,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 404. [2021-08-06 19:31:14,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.367245657568238) internal successors, (954), 403 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:14,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 954 transitions. [2021-08-06 19:31:14,078 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 954 transitions. Word has length 19 [2021-08-06 19:31:14,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:14,078 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 954 transitions. [2021-08-06 19:31:14,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:14,078 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 954 transitions. [2021-08-06 19:31:14,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 19:31:14,078 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:14,079 INFO L512 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:14,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:14,295 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,SelfDestructingSolverStorable41 [2021-08-06 19:31:14,295 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:14,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:14,295 INFO L82 PathProgramCache]: Analyzing trace with hash -852441291, now seen corresponding path program 39 times [2021-08-06 19:31:14,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:14,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896491175] [2021-08-06 19:31:14,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:14,295 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:14,367 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:14,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:14,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896491175] [2021-08-06 19:31:14,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896491175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:14,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501785170] [2021-08-06 19:31:14,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:31:14,367 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:14,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:14,368 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:14,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 19:31:14,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:31:14,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:14,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 19:31:14,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:14,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:31:14,941 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 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-08-06 19:31:17,022 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:17,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501785170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:17,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:17,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-08-06 19:31:17,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773873262] [2021-08-06 19:31:17,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:31:17,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:17,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:31:17,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:31:17,023 INFO L87 Difference]: Start difference. First operand 404 states and 954 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:17,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:17,221 INFO L93 Difference]: Finished difference Result 541 states and 1214 transitions. [2021-08-06 19:31:17,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:31:17,221 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 19:31:17,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:17,223 INFO L225 Difference]: With dead ends: 541 [2021-08-06 19:31:17,223 INFO L226 Difference]: Without dead ends: 538 [2021-08-06 19:31:17,223 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 162.5ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:31:17,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-08-06 19:31:17,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 465. [2021-08-06 19:31:17,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.435344827586207) internal successors, (1130), 464 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:17,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1130 transitions. [2021-08-06 19:31:17,230 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1130 transitions. Word has length 19 [2021-08-06 19:31:17,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:17,230 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 1130 transitions. [2021-08-06 19:31:17,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:17,230 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1130 transitions. [2021-08-06 19:31:17,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 19:31:17,230 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:17,231 INFO L512 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:17,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:17,447 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,SelfDestructingSolverStorable42 [2021-08-06 19:31:17,447 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:17,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:17,447 INFO L82 PathProgramCache]: Analyzing trace with hash 2134834793, now seen corresponding path program 40 times [2021-08-06 19:31:17,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:17,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778402822] [2021-08-06 19:31:17,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:17,447 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:17,513 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:17,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:17,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778402822] [2021-08-06 19:31:17,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778402822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:17,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342207385] [2021-08-06 19:31:17,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:31:17,514 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:17,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:17,514 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:17,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 19:31:17,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:31:17,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:17,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 19:31:17,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:18,090 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:31:18,090 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 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-08-06 19:31:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:20,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342207385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:20,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:20,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-08-06 19:31:20,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573324687] [2021-08-06 19:31:20,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:31:20,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:20,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:31:20,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:31:20,222 INFO L87 Difference]: Start difference. First operand 465 states and 1130 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:20,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:20,451 INFO L93 Difference]: Finished difference Result 619 states and 1438 transitions. [2021-08-06 19:31:20,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:31:20,452 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 19:31:20,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:20,454 INFO L225 Difference]: With dead ends: 619 [2021-08-06 19:31:20,454 INFO L226 Difference]: Without dead ends: 616 [2021-08-06 19:31:20,454 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 157.3ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:31:20,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-08-06 19:31:20,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 546. [2021-08-06 19:31:20,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 2.491743119266055) internal successors, (1358), 545 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:20,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1358 transitions. [2021-08-06 19:31:20,465 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1358 transitions. Word has length 19 [2021-08-06 19:31:20,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:20,465 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 1358 transitions. [2021-08-06 19:31:20,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:20,465 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1358 transitions. [2021-08-06 19:31:20,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 19:31:20,466 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:20,466 INFO L512 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:20,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:20,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:20,685 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:20,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:20,685 INFO L82 PathProgramCache]: Analyzing trace with hash 251112885, now seen corresponding path program 41 times [2021-08-06 19:31:20,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:20,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572978270] [2021-08-06 19:31:20,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:20,686 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:20,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:20,756 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:31:20,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:20,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572978270] [2021-08-06 19:31:20,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572978270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:20,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857143718] [2021-08-06 19:31:20,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:31:20,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:20,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:20,758 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:20,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 19:31:21,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:31:21,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:21,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 19:31:21,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:21,366 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:31:21,366 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 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-08-06 19:31:23,462 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:23,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857143718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:23,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:23,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-08-06 19:31:23,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530320235] [2021-08-06 19:31:23,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:31:23,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:23,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:31:23,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:31:23,464 INFO L87 Difference]: Start difference. First operand 546 states and 1358 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:23,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:23,699 INFO L93 Difference]: Finished difference Result 717 states and 1713 transitions. [2021-08-06 19:31:23,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:31:23,699 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 19:31:23,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:23,701 INFO L225 Difference]: With dead ends: 717 [2021-08-06 19:31:23,701 INFO L226 Difference]: Without dead ends: 714 [2021-08-06 19:31:23,702 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 161.8ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:31:23,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-08-06 19:31:23,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 644. [2021-08-06 19:31:23,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 2.5381026438569205) internal successors, (1632), 643 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:23,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1632 transitions. [2021-08-06 19:31:23,713 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1632 transitions. Word has length 19 [2021-08-06 19:31:23,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:23,713 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 1632 transitions. [2021-08-06 19:31:23,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:23,713 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1632 transitions. [2021-08-06 19:31:23,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 19:31:23,714 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:23,714 INFO L512 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:23,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:23,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:23,933 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:23,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:23,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1985275881, now seen corresponding path program 42 times [2021-08-06 19:31:23,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:23,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189212615] [2021-08-06 19:31:23,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:23,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:23,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:24,006 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:24,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:24,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189212615] [2021-08-06 19:31:24,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189212615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:24,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003600170] [2021-08-06 19:31:24,007 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:31:24,007 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:24,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:24,008 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:24,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 19:31:24,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:31:24,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:24,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 19:31:24,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:24,637 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:31:24,637 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 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-08-06 19:31:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:26,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003600170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:26,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:26,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-08-06 19:31:26,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125937461] [2021-08-06 19:31:26,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:31:26,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:26,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:31:26,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:31:26,010 INFO L87 Difference]: Start difference. First operand 644 states and 1632 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:26,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:26,209 INFO L93 Difference]: Finished difference Result 805 states and 1945 transitions. [2021-08-06 19:31:26,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:31:26,209 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 19:31:26,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:26,211 INFO L225 Difference]: With dead ends: 805 [2021-08-06 19:31:26,212 INFO L226 Difference]: Without dead ends: 802 [2021-08-06 19:31:26,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 173.2ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:31:26,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-08-06 19:31:26,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 735. [2021-08-06 19:31:26,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 2.5476839237057223) internal successors, (1870), 734 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:26,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1870 transitions. [2021-08-06 19:31:26,222 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1870 transitions. Word has length 19 [2021-08-06 19:31:26,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:26,222 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 1870 transitions. [2021-08-06 19:31:26,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:26,222 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1870 transitions. [2021-08-06 19:31:26,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 19:31:26,223 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:26,223 INFO L512 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:26,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:26,432 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,SelfDestructingSolverStorable45 [2021-08-06 19:31:26,433 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:26,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:26,433 INFO L82 PathProgramCache]: Analyzing trace with hash -90246091, now seen corresponding path program 43 times [2021-08-06 19:31:26,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:26,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065676096] [2021-08-06 19:31:26,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:26,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:26,504 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:26,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:26,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065676096] [2021-08-06 19:31:26,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065676096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:26,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776995221] [2021-08-06 19:31:26,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:31:26,505 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:26,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:26,505 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:26,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 19:31:26,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:26,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 19:31:26,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:27,125 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:31:27,126 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 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-08-06 19:31:28,907 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:28,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776995221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:28,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:28,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-08-06 19:31:28,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251997827] [2021-08-06 19:31:28,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:31:28,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:28,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:31:28,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:31:28,908 INFO L87 Difference]: Start difference. First operand 735 states and 1870 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:29,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:29,158 INFO L93 Difference]: Finished difference Result 893 states and 2175 transitions. [2021-08-06 19:31:29,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:31:29,158 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 19:31:29,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:29,161 INFO L225 Difference]: With dead ends: 893 [2021-08-06 19:31:29,161 INFO L226 Difference]: Without dead ends: 890 [2021-08-06 19:31:29,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 161.6ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:31:29,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-08-06 19:31:29,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 824. [2021-08-06 19:31:29,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 2.5528554070473874) internal successors, (2101), 823 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:29,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2101 transitions. [2021-08-06 19:31:29,173 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2101 transitions. Word has length 19 [2021-08-06 19:31:29,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:29,173 INFO L470 AbstractCegarLoop]: Abstraction has 824 states and 2101 transitions. [2021-08-06 19:31:29,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:29,173 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2101 transitions. [2021-08-06 19:31:29,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 19:31:29,174 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:29,174 INFO L512 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:29,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:29,391 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,SelfDestructingSolverStorable46 [2021-08-06 19:31:29,391 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:29,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:29,391 INFO L82 PathProgramCache]: Analyzing trace with hash -6917783, now seen corresponding path program 44 times [2021-08-06 19:31:29,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:29,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980786499] [2021-08-06 19:31:29,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:29,391 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:29,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:29,465 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:29,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:29,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980786499] [2021-08-06 19:31:29,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980786499] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:29,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336909548] [2021-08-06 19:31:29,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:31:29,466 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:29,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:29,466 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:29,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 19:31:29,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:31:29,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:29,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 19:31:29,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:30,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:31:30,107 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 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-08-06 19:31:32,048 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:32,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336909548] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:32,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:32,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-08-06 19:31:32,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735380810] [2021-08-06 19:31:32,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:31:32,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:32,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:31:32,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:31:32,049 INFO L87 Difference]: Start difference. First operand 824 states and 2101 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:32,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:32,250 INFO L93 Difference]: Finished difference Result 981 states and 2396 transitions. [2021-08-06 19:31:32,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:31:32,250 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 19:31:32,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:32,253 INFO L225 Difference]: With dead ends: 981 [2021-08-06 19:31:32,253 INFO L226 Difference]: Without dead ends: 978 [2021-08-06 19:31:32,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 180.3ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:31:32,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-08-06 19:31:32,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 913. [2021-08-06 19:31:32,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 912 states have (on average 2.5471491228070176) internal successors, (2323), 912 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:32,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 2323 transitions. [2021-08-06 19:31:32,266 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 2323 transitions. Word has length 19 [2021-08-06 19:31:32,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:32,266 INFO L470 AbstractCegarLoop]: Abstraction has 913 states and 2323 transitions. [2021-08-06 19:31:32,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:32,266 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 2323 transitions. [2021-08-06 19:31:32,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 19:31:32,268 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:32,268 INFO L512 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:32,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:32,484 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,SelfDestructingSolverStorable47 [2021-08-06 19:31:32,485 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:32,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:32,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1718707531, now seen corresponding path program 45 times [2021-08-06 19:31:32,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:32,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011976745] [2021-08-06 19:31:32,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:32,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:32,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:32,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:32,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011976745] [2021-08-06 19:31:32,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011976745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:32,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738261275] [2021-08-06 19:31:32,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:31:32,554 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:32,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:32,554 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:32,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 19:31:32,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:31:32,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:32,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 19:31:32,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:33,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:31:33,109 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 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-08-06 19:31:34,552 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:34,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738261275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:34,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:34,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-08-06 19:31:34,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463622542] [2021-08-06 19:31:34,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:31:34,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:34,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:31:34,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:31:34,553 INFO L87 Difference]: Start difference. First operand 913 states and 2323 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:34,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:34,796 INFO L93 Difference]: Finished difference Result 1045 states and 2563 transitions. [2021-08-06 19:31:34,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:31:34,796 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 19:31:34,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:34,799 INFO L225 Difference]: With dead ends: 1045 [2021-08-06 19:31:34,799 INFO L226 Difference]: Without dead ends: 1042 [2021-08-06 19:31:34,800 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 163.1ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:31:34,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-08-06 19:31:34,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 985. [2021-08-06 19:31:34,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 2.5436991869918697) internal successors, (2503), 984 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:34,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 2503 transitions. [2021-08-06 19:31:34,812 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 2503 transitions. Word has length 19 [2021-08-06 19:31:34,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:34,812 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 2503 transitions. [2021-08-06 19:31:34,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:34,812 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 2503 transitions. [2021-08-06 19:31:34,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:31:34,813 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:34,813 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:34,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:35,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:35,030 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:35,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:35,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1244541120, now seen corresponding path program 46 times [2021-08-06 19:31:35,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:35,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231277628] [2021-08-06 19:31:35,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:35,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:35,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:35,124 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:35,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:35,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231277628] [2021-08-06 19:31:35,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231277628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:35,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961393874] [2021-08-06 19:31:35,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:31:35,124 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:35,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:35,125 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:35,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 19:31:35,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:31:35,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:35,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:31:35,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:35,521 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:35,521 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:35,533 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:35,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961393874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:35,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:35,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:31:35,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518818934] [2021-08-06 19:31:35,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:31:35,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:35,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:31:35,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:31:35,534 INFO L87 Difference]: Start difference. First operand 985 states and 2503 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:35,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:35,682 INFO L93 Difference]: Finished difference Result 1032 states and 2573 transitions. [2021-08-06 19:31:35,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:31:35,682 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:31:35,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:35,685 INFO L225 Difference]: With dead ends: 1032 [2021-08-06 19:31:35,685 INFO L226 Difference]: Without dead ends: 1032 [2021-08-06 19:31:35,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 139.5ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:31:35,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2021-08-06 19:31:35,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 960. [2021-08-06 19:31:35,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 2.534932221063608) internal successors, (2431), 959 states have internal predecessors, (2431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:35,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 2431 transitions. [2021-08-06 19:31:35,698 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 2431 transitions. Word has length 20 [2021-08-06 19:31:35,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:35,698 INFO L470 AbstractCegarLoop]: Abstraction has 960 states and 2431 transitions. [2021-08-06 19:31:35,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:35,698 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 2431 transitions. [2021-08-06 19:31:35,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:31:35,699 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:35,699 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:35,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:35,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-06 19:31:35,916 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:35,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:35,916 INFO L82 PathProgramCache]: Analyzing trace with hash 766203152, now seen corresponding path program 47 times [2021-08-06 19:31:35,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:35,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952818164] [2021-08-06 19:31:35,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:35,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:35,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:36,010 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:36,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:36,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952818164] [2021-08-06 19:31:36,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952818164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:36,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065437639] [2021-08-06 19:31:36,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:31:36,011 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:36,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:36,011 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:36,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 19:31:36,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:31:36,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:36,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:31:36,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:36,434 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:31:36,434 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:31:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:36,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065437639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:36,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:36,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:31:36,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551124800] [2021-08-06 19:31:36,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:31:36,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:36,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:31:36,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:31:36,448 INFO L87 Difference]: Start difference. First operand 960 states and 2431 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:36,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:36,631 INFO L93 Difference]: Finished difference Result 1063 states and 2568 transitions. [2021-08-06 19:31:36,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:31:36,632 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:31:36,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:36,634 INFO L225 Difference]: With dead ends: 1063 [2021-08-06 19:31:36,635 INFO L226 Difference]: Without dead ends: 1060 [2021-08-06 19:31:36,635 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 186.3ms TimeCoverageRelationStatistics Valid=337, Invalid=655, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:31:36,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2021-08-06 19:31:36,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 984. [2021-08-06 19:31:36,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 2.5198372329603256) internal successors, (2477), 983 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:36,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 2477 transitions. [2021-08-06 19:31:36,648 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 2477 transitions. Word has length 20 [2021-08-06 19:31:36,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:36,648 INFO L470 AbstractCegarLoop]: Abstraction has 984 states and 2477 transitions. [2021-08-06 19:31:36,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:36,648 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 2477 transitions. [2021-08-06 19:31:36,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:31:36,650 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:36,650 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:36,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:36,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:36,866 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:36,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:36,866 INFO L82 PathProgramCache]: Analyzing trace with hash -447080394, now seen corresponding path program 48 times [2021-08-06 19:31:36,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:36,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019013452] [2021-08-06 19:31:36,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:36,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:36,942 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:36,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:36,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019013452] [2021-08-06 19:31:36,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019013452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:36,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651167162] [2021-08-06 19:31:36,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:31:36,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:36,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:36,944 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:36,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 19:31:37,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:31:37,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:37,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:31:37,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:37,331 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:37,332 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:37,341 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:37,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651167162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:37,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:37,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:31:37,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341292086] [2021-08-06 19:31:37,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:31:37,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:37,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:31:37,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:31:37,342 INFO L87 Difference]: Start difference. First operand 984 states and 2477 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:37,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:37,377 INFO L93 Difference]: Finished difference Result 1089 states and 2620 transitions. [2021-08-06 19:31:37,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:31:37,377 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:31:37,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:37,380 INFO L225 Difference]: With dead ends: 1089 [2021-08-06 19:31:37,380 INFO L226 Difference]: Without dead ends: 1089 [2021-08-06 19:31:37,380 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:31:37,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-08-06 19:31:37,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 950. [2021-08-06 19:31:37,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 949 states have (on average 2.512118018967334) internal successors, (2384), 949 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:37,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 2384 transitions. [2021-08-06 19:31:37,391 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 2384 transitions. Word has length 20 [2021-08-06 19:31:37,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:37,391 INFO L470 AbstractCegarLoop]: Abstraction has 950 states and 2384 transitions. [2021-08-06 19:31:37,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:37,391 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 2384 transitions. [2021-08-06 19:31:37,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:31:37,392 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:37,392 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:37,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:37,609 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,SelfDestructingSolverStorable51 [2021-08-06 19:31:37,609 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:37,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:37,609 INFO L82 PathProgramCache]: Analyzing trace with hash 674890396, now seen corresponding path program 49 times [2021-08-06 19:31:37,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:37,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946192917] [2021-08-06 19:31:37,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:37,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:37,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:37,671 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:37,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:37,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946192917] [2021-08-06 19:31:37,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946192917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:37,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156544382] [2021-08-06 19:31:37,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:31:37,671 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:37,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:37,672 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:37,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 19:31:38,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:38,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:31:38,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:38,083 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:31:38,084 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:31:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:38,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156544382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:38,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:38,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:31:38,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880238828] [2021-08-06 19:31:38,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:31:38,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:38,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:31:38,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:31:38,102 INFO L87 Difference]: Start difference. First operand 950 states and 2384 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:38,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:38,232 INFO L93 Difference]: Finished difference Result 1035 states and 2489 transitions. [2021-08-06 19:31:38,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:31:38,233 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:31:38,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:38,235 INFO L225 Difference]: With dead ends: 1035 [2021-08-06 19:31:38,235 INFO L226 Difference]: Without dead ends: 1034 [2021-08-06 19:31:38,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=175, Invalid=287, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:31:38,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-08-06 19:31:38,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 960. [2021-08-06 19:31:38,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 2.510948905109489) internal successors, (2408), 959 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:38,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 2408 transitions. [2021-08-06 19:31:38,247 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 2408 transitions. Word has length 20 [2021-08-06 19:31:38,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:38,247 INFO L470 AbstractCegarLoop]: Abstraction has 960 states and 2408 transitions. [2021-08-06 19:31:38,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:38,248 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 2408 transitions. [2021-08-06 19:31:38,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:31:38,250 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:38,250 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:38,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:38,464 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,SelfDestructingSolverStorable52 [2021-08-06 19:31:38,465 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:38,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:38,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1476506624, now seen corresponding path program 50 times [2021-08-06 19:31:38,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:38,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541351842] [2021-08-06 19:31:38,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:38,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:38,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:38,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541351842] [2021-08-06 19:31:38,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541351842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:38,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15212211] [2021-08-06 19:31:38,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:31:38,541 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:38,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:38,541 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:38,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 19:31:38,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:31:38,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:38,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:31:38,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:38,955 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:38,956 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:38,967 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:38,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15212211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:38,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:38,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:31:38,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789610459] [2021-08-06 19:31:38,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:31:38,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:38,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:31:38,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:31:38,968 INFO L87 Difference]: Start difference. First operand 960 states and 2408 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:39,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:39,069 INFO L93 Difference]: Finished difference Result 1067 states and 2577 transitions. [2021-08-06 19:31:39,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:31:39,069 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:31:39,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:39,072 INFO L225 Difference]: With dead ends: 1067 [2021-08-06 19:31:39,072 INFO L226 Difference]: Without dead ends: 1067 [2021-08-06 19:31:39,072 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:31:39,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-08-06 19:31:39,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 953. [2021-08-06 19:31:39,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 2.508403361344538) internal successors, (2388), 952 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:39,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 2388 transitions. [2021-08-06 19:31:39,085 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 2388 transitions. Word has length 20 [2021-08-06 19:31:39,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:39,085 INFO L470 AbstractCegarLoop]: Abstraction has 953 states and 2388 transitions. [2021-08-06 19:31:39,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:39,085 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 2388 transitions. [2021-08-06 19:31:39,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:31:39,086 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:39,086 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:39,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:39,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:39,303 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:39,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:39,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1043453310, now seen corresponding path program 51 times [2021-08-06 19:31:39,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:39,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589785457] [2021-08-06 19:31:39,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:39,304 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:39,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:39,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:39,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589785457] [2021-08-06 19:31:39,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589785457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:39,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573418303] [2021-08-06 19:31:39,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:31:39,397 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:39,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:39,413 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:39,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 19:31:39,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:31:39,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:39,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:31:39,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:39,853 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:39,854 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:39,868 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:39,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573418303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:39,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:39,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:31:39,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342227098] [2021-08-06 19:31:39,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:31:39,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:39,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:31:39,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:31:39,869 INFO L87 Difference]: Start difference. First operand 953 states and 2388 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:39,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:39,916 INFO L93 Difference]: Finished difference Result 1075 states and 2555 transitions. [2021-08-06 19:31:39,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:31:39,916 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:31:39,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:39,919 INFO L225 Difference]: With dead ends: 1075 [2021-08-06 19:31:39,919 INFO L226 Difference]: Without dead ends: 1075 [2021-08-06 19:31:39,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:31:39,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-08-06 19:31:39,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 956. [2021-08-06 19:31:39,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 2.506806282722513) internal successors, (2394), 955 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:39,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 2394 transitions. [2021-08-06 19:31:39,931 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 2394 transitions. Word has length 20 [2021-08-06 19:31:39,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:39,932 INFO L470 AbstractCegarLoop]: Abstraction has 956 states and 2394 transitions. [2021-08-06 19:31:39,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:39,932 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 2394 transitions. [2021-08-06 19:31:39,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:31:39,933 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:39,933 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:39,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:40,150 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,SelfDestructingSolverStorable54 [2021-08-06 19:31:40,151 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:40,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:40,151 INFO L82 PathProgramCache]: Analyzing trace with hash 667159998, now seen corresponding path program 52 times [2021-08-06 19:31:40,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:40,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663218780] [2021-08-06 19:31:40,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:40,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:40,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:40,227 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:40,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:40,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663218780] [2021-08-06 19:31:40,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663218780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:40,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485079723] [2021-08-06 19:31:40,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:31:40,228 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:40,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:40,229 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:40,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 19:31:40,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:31:40,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:40,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:31:40,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:40,688 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:40,688 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:40,702 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:40,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485079723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:40,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:40,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 19:31:40,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030445375] [2021-08-06 19:31:40,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:31:40,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:40,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:31:40,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:31:40,703 INFO L87 Difference]: Start difference. First operand 956 states and 2394 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:40,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:40,777 INFO L93 Difference]: Finished difference Result 1134 states and 2673 transitions. [2021-08-06 19:31:40,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:31:40,777 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:31:40,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:40,780 INFO L225 Difference]: With dead ends: 1134 [2021-08-06 19:31:40,780 INFO L226 Difference]: Without dead ends: 1134 [2021-08-06 19:31:40,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:31:40,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2021-08-06 19:31:40,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 920. [2021-08-06 19:31:40,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 2.499455930359086) internal successors, (2297), 919 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) [2021-08-06 19:31:40,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 2297 transitions. [2021-08-06 19:31:40,792 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 2297 transitions. Word has length 20 [2021-08-06 19:31:40,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:40,792 INFO L470 AbstractCegarLoop]: Abstraction has 920 states and 2297 transitions. [2021-08-06 19:31:40,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:40,792 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2297 transitions. [2021-08-06 19:31:40,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:31:40,793 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:40,793 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:40,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:41,010 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,SelfDestructingSolverStorable55 [2021-08-06 19:31:41,010 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:41,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:41,010 INFO L82 PathProgramCache]: Analyzing trace with hash -632800816, now seen corresponding path program 53 times [2021-08-06 19:31:41,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:41,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843302056] [2021-08-06 19:31:41,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:41,011 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:41,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:41,085 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:41,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:41,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843302056] [2021-08-06 19:31:41,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843302056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:41,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604155224] [2021-08-06 19:31:41,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:31:41,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:41,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:41,087 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:41,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 19:31:41,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:31:41,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:41,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:31:41,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:41,529 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:31:41,529 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:31:41,543 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:41,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604155224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:41,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:41,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:31:41,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945696061] [2021-08-06 19:31:41,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:31:41,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:41,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:31:41,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:31:41,544 INFO L87 Difference]: Start difference. First operand 920 states and 2297 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:41,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:41,651 INFO L93 Difference]: Finished difference Result 1007 states and 2405 transitions. [2021-08-06 19:31:41,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:31:41,651 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:31:41,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:41,653 INFO L225 Difference]: With dead ends: 1007 [2021-08-06 19:31:41,654 INFO L226 Difference]: Without dead ends: 1006 [2021-08-06 19:31:41,654 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 104.5ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:31:41,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-08-06 19:31:41,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 932. [2021-08-06 19:31:41,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 931 states have (on average 2.4962406015037595) internal successors, (2324), 931 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:41,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 2324 transitions. [2021-08-06 19:31:41,668 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 2324 transitions. Word has length 20 [2021-08-06 19:31:41,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:41,668 INFO L470 AbstractCegarLoop]: Abstraction has 932 states and 2324 transitions. [2021-08-06 19:31:41,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:41,669 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 2324 transitions. [2021-08-06 19:31:41,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:31:41,670 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:41,670 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:41,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-08-06 19:31:41,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:41,881 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:41,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:41,881 INFO L82 PathProgramCache]: Analyzing trace with hash 168815412, now seen corresponding path program 54 times [2021-08-06 19:31:41,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:41,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411892256] [2021-08-06 19:31:41,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:41,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:41,959 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:41,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:41,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411892256] [2021-08-06 19:31:41,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411892256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:41,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949326474] [2021-08-06 19:31:41,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:31:41,960 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:41,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:41,960 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:41,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 19:31:42,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:31:42,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:42,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:31:42,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:42,409 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:42,409 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:42,421 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:42,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949326474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:42,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:42,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:31:42,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034509228] [2021-08-06 19:31:42,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:31:42,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:42,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:31:42,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:31:42,422 INFO L87 Difference]: Start difference. First operand 932 states and 2324 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:42,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:42,511 INFO L93 Difference]: Finished difference Result 1033 states and 2474 transitions. [2021-08-06 19:31:42,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:31:42,511 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:31:42,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:42,514 INFO L225 Difference]: With dead ends: 1033 [2021-08-06 19:31:42,514 INFO L226 Difference]: Without dead ends: 1033 [2021-08-06 19:31:42,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:31:42,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2021-08-06 19:31:42,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 920. [2021-08-06 19:31:42,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 2.4929270946681177) internal successors, (2291), 919 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:42,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 2291 transitions. [2021-08-06 19:31:42,527 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 2291 transitions. Word has length 20 [2021-08-06 19:31:42,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:42,527 INFO L470 AbstractCegarLoop]: Abstraction has 920 states and 2291 transitions. [2021-08-06 19:31:42,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:42,528 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2291 transitions. [2021-08-06 19:31:42,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:31:42,529 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:42,529 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:42,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:42,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:42,746 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:42,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:42,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1943822774, now seen corresponding path program 55 times [2021-08-06 19:31:42,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:42,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063229749] [2021-08-06 19:31:42,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:42,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:42,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:42,821 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:42,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:42,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063229749] [2021-08-06 19:31:42,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063229749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:42,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088561881] [2021-08-06 19:31:42,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:31:42,822 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:42,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:42,823 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:42,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 19:31:43,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:43,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:31:43,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:43,288 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:43,289 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:43,303 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:43,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088561881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:43,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:43,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:31:43,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064381857] [2021-08-06 19:31:43,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:31:43,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:43,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:31:43,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:31:43,304 INFO L87 Difference]: Start difference. First operand 920 states and 2291 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:43,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:43,352 INFO L93 Difference]: Finished difference Result 1041 states and 2456 transitions. [2021-08-06 19:31:43,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:31:43,353 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:31:43,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:43,354 INFO L225 Difference]: With dead ends: 1041 [2021-08-06 19:31:43,354 INFO L226 Difference]: Without dead ends: 1041 [2021-08-06 19:31:43,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:31:43,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2021-08-06 19:31:43,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 922. [2021-08-06 19:31:43,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 2.49185667752443) internal successors, (2295), 921 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:43,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 2295 transitions. [2021-08-06 19:31:43,367 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 2295 transitions. Word has length 20 [2021-08-06 19:31:43,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:43,368 INFO L470 AbstractCegarLoop]: Abstraction has 922 states and 2295 transitions. [2021-08-06 19:31:43,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:43,368 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 2295 transitions. [2021-08-06 19:31:43,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:31:43,369 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:43,369 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:43,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-06 19:31:43,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:43,589 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:43,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:43,589 INFO L82 PathProgramCache]: Analyzing trace with hash -640531214, now seen corresponding path program 56 times [2021-08-06 19:31:43,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:43,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607605972] [2021-08-06 19:31:43,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:43,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:43,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:43,665 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:43,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:43,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607605972] [2021-08-06 19:31:43,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607605972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:43,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034032419] [2021-08-06 19:31:43,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:31:43,665 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:43,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:43,666 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:43,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 19:31:44,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:31:44,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:44,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:31:44,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:44,136 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:44,137 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:44,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034032419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:44,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:44,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 19:31:44,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197020633] [2021-08-06 19:31:44,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:31:44,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:44,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:31:44,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:31:44,154 INFO L87 Difference]: Start difference. First operand 922 states and 2295 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:44,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:44,241 INFO L93 Difference]: Finished difference Result 1105 states and 2577 transitions. [2021-08-06 19:31:44,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:31:44,241 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:31:44,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:44,243 INFO L225 Difference]: With dead ends: 1105 [2021-08-06 19:31:44,243 INFO L226 Difference]: Without dead ends: 1105 [2021-08-06 19:31:44,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:31:44,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-08-06 19:31:44,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 893. [2021-08-06 19:31:44,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 2.4798206278026904) internal successors, (2212), 892 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:44,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 2212 transitions. [2021-08-06 19:31:44,256 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 2212 transitions. Word has length 20 [2021-08-06 19:31:44,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:44,256 INFO L470 AbstractCegarLoop]: Abstraction has 893 states and 2212 transitions. [2021-08-06 19:31:44,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:44,256 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 2212 transitions. [2021-08-06 19:31:44,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:31:44,257 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:44,257 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:44,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:44,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-06 19:31:44,474 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:44,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:44,474 INFO L82 PathProgramCache]: Analyzing trace with hash 848873782, now seen corresponding path program 57 times [2021-08-06 19:31:44,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:44,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010830839] [2021-08-06 19:31:44,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:44,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:44,558 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:44,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:44,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010830839] [2021-08-06 19:31:44,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010830839] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:44,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18137754] [2021-08-06 19:31:44,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:31:44,558 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:44,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:44,573 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:44,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 19:31:45,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:31:45,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:45,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:31:45,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:45,099 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:45,099 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:45,113 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:45,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18137754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:45,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:45,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 19:31:45,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267538229] [2021-08-06 19:31:45,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:31:45,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:45,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:31:45,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:31:45,114 INFO L87 Difference]: Start difference. First operand 893 states and 2212 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:45,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:45,212 INFO L93 Difference]: Finished difference Result 1486 states and 3656 transitions. [2021-08-06 19:31:45,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:31:45,213 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:31:45,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:45,215 INFO L225 Difference]: With dead ends: 1486 [2021-08-06 19:31:45,215 INFO L226 Difference]: Without dead ends: 1486 [2021-08-06 19:31:45,215 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:31:45,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2021-08-06 19:31:45,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1239. [2021-08-06 19:31:45,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 2.596930533117932) internal successors, (3215), 1238 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:45,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 3215 transitions. [2021-08-06 19:31:45,230 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 3215 transitions. Word has length 20 [2021-08-06 19:31:45,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:45,230 INFO L470 AbstractCegarLoop]: Abstraction has 1239 states and 3215 transitions. [2021-08-06 19:31:45,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:45,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 3215 transitions. [2021-08-06 19:31:45,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:31:45,231 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:45,231 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:45,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:45,448 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,SelfDestructingSolverStorable60 [2021-08-06 19:31:45,448 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:45,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:45,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1778444572, now seen corresponding path program 58 times [2021-08-06 19:31:45,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:45,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712373347] [2021-08-06 19:31:45,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:45,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:45,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:45,523 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:45,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:45,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712373347] [2021-08-06 19:31:45,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712373347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:45,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667817030] [2021-08-06 19:31:45,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:31:45,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:45,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:45,524 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:45,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 19:31:45,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:31:45,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:45,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:31:45,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:45,865 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:31:45,866 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:31:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:45,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667817030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:45,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:45,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:31:45,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407566884] [2021-08-06 19:31:45,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:31:45,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:45,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:31:45,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:31:45,881 INFO L87 Difference]: Start difference. First operand 1239 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:45,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:45,985 INFO L93 Difference]: Finished difference Result 1346 states and 3378 transitions. [2021-08-06 19:31:45,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:31:45,985 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:31:45,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:45,987 INFO L225 Difference]: With dead ends: 1346 [2021-08-06 19:31:45,987 INFO L226 Difference]: Without dead ends: 1345 [2021-08-06 19:31:45,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 97.6ms TimeCoverageRelationStatistics Valid=173, Invalid=289, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:31:45,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2021-08-06 19:31:45,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1272. [2021-08-06 19:31:46,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1271 states have (on average 2.5877261998426437) internal successors, (3289), 1271 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:46,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 3289 transitions. [2021-08-06 19:31:46,002 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 3289 transitions. Word has length 20 [2021-08-06 19:31:46,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:46,002 INFO L470 AbstractCegarLoop]: Abstraction has 1272 states and 3289 transitions. [2021-08-06 19:31:46,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:46,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 3289 transitions. [2021-08-06 19:31:46,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:31:46,003 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:46,003 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:46,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:46,216 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,SelfDestructingSolverStorable61 [2021-08-06 19:31:46,217 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:46,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:46,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1714906496, now seen corresponding path program 59 times [2021-08-06 19:31:46,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:46,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105333616] [2021-08-06 19:31:46,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:46,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:46,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:46,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:46,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105333616] [2021-08-06 19:31:46,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105333616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:46,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250735101] [2021-08-06 19:31:46,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:31:46,293 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:46,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:46,293 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:46,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 19:31:46,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 19:31:46,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:46,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:31:46,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:46,773 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:46,773 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:46,785 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:46,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250735101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:46,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:46,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:31:46,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887121254] [2021-08-06 19:31:46,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:31:46,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:46,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:31:46,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:31:46,786 INFO L87 Difference]: Start difference. First operand 1272 states and 3289 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:46,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:46,858 INFO L93 Difference]: Finished difference Result 1364 states and 3416 transitions. [2021-08-06 19:31:46,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:31:46,859 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:31:46,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:46,860 INFO L225 Difference]: With dead ends: 1364 [2021-08-06 19:31:46,861 INFO L226 Difference]: Without dead ends: 1364 [2021-08-06 19:31:46,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:31:46,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2021-08-06 19:31:46,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 1240. [2021-08-06 19:31:46,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 2.5843422114608554) internal successors, (3202), 1239 states have internal predecessors, (3202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:46,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 3202 transitions. [2021-08-06 19:31:46,875 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 3202 transitions. Word has length 20 [2021-08-06 19:31:46,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:46,875 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 3202 transitions. [2021-08-06 19:31:46,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:46,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 3202 transitions. [2021-08-06 19:31:46,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:31:46,876 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:46,876 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:46,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:47,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:47,093 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:47,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:47,093 INFO L82 PathProgramCache]: Analyzing trace with hash 60100866, now seen corresponding path program 60 times [2021-08-06 19:31:47,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:47,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894054151] [2021-08-06 19:31:47,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:47,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:47,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:47,169 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:47,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:47,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894054151] [2021-08-06 19:31:47,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894054151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:47,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491195740] [2021-08-06 19:31:47,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:31:47,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:47,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:47,170 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:47,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 19:31:47,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:31:47,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:47,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:31:47,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:47,674 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:47,675 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:47,689 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:47,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491195740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:47,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:47,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:31:47,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083976369] [2021-08-06 19:31:47,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:31:47,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:47,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:31:47,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:31:47,690 INFO L87 Difference]: Start difference. First operand 1240 states and 3202 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:47,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:47,736 INFO L93 Difference]: Finished difference Result 1337 states and 3307 transitions. [2021-08-06 19:31:47,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:31:47,736 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:31:47,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:47,738 INFO L225 Difference]: With dead ends: 1337 [2021-08-06 19:31:47,738 INFO L226 Difference]: Without dead ends: 1337 [2021-08-06 19:31:47,738 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:31:47,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2021-08-06 19:31:47,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 1243. [2021-08-06 19:31:47,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 1242 states have (on average 2.572463768115942) internal successors, (3195), 1242 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:47,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 3195 transitions. [2021-08-06 19:31:47,753 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 3195 transitions. Word has length 20 [2021-08-06 19:31:47,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:47,753 INFO L470 AbstractCegarLoop]: Abstraction has 1243 states and 3195 transitions. [2021-08-06 19:31:47,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:47,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 3195 transitions. [2021-08-06 19:31:47,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:31:47,754 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:47,754 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:47,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:47,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:47,971 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:47,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:47,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1770714174, now seen corresponding path program 61 times [2021-08-06 19:31:47,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:47,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085007049] [2021-08-06 19:31:47,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:47,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:47,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:48,045 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:48,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:48,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085007049] [2021-08-06 19:31:48,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085007049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:48,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226559429] [2021-08-06 19:31:48,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:31:48,046 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:48,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:48,046 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:48,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 19:31:48,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:48,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:31:48,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:48,540 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:48,540 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:48,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226559429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:48,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:48,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 19:31:48,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030811115] [2021-08-06 19:31:48,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:31:48,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:48,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:31:48,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:31:48,555 INFO L87 Difference]: Start difference. First operand 1243 states and 3195 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:48,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:48,630 INFO L93 Difference]: Finished difference Result 1383 states and 3392 transitions. [2021-08-06 19:31:48,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:31:48,630 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:31:48,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:48,632 INFO L225 Difference]: With dead ends: 1383 [2021-08-06 19:31:48,632 INFO L226 Difference]: Without dead ends: 1383 [2021-08-06 19:31:48,632 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:31:48,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2021-08-06 19:31:48,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1181. [2021-08-06 19:31:48,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 1180 states have (on average 2.5677966101694913) internal successors, (3030), 1180 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) [2021-08-06 19:31:48,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 3030 transitions. [2021-08-06 19:31:48,646 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 3030 transitions. Word has length 20 [2021-08-06 19:31:48,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:48,646 INFO L470 AbstractCegarLoop]: Abstraction has 1181 states and 3030 transitions. [2021-08-06 19:31:48,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:48,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 3030 transitions. [2021-08-06 19:31:48,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:31:48,648 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:48,648 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:48,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:48,864 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,SelfDestructingSolverStorable64 [2021-08-06 19:31:48,865 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:48,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:48,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1034848126, now seen corresponding path program 62 times [2021-08-06 19:31:48,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:48,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341444947] [2021-08-06 19:31:48,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:48,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:48,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:48,944 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:48,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:48,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341444947] [2021-08-06 19:31:48,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341444947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:48,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187114255] [2021-08-06 19:31:48,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:31:48,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:48,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:48,945 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:48,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 19:31:49,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:31:49,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:49,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:31:49,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:49,466 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:49,467 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:49,481 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:49,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187114255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:49,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:49,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 19:31:49,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836967902] [2021-08-06 19:31:49,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:31:49,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:49,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:31:49,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:31:49,482 INFO L87 Difference]: Start difference. First operand 1181 states and 3030 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:49,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:49,571 INFO L93 Difference]: Finished difference Result 1915 states and 4898 transitions. [2021-08-06 19:31:49,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:31:49,571 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:31:49,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:49,574 INFO L225 Difference]: With dead ends: 1915 [2021-08-06 19:31:49,574 INFO L226 Difference]: Without dead ends: 1915 [2021-08-06 19:31:49,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:31:49,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2021-08-06 19:31:49,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1742. [2021-08-06 19:31:49,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1742 states, 1741 states have (on average 2.648477886272257) internal successors, (4611), 1741 states have internal predecessors, (4611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:49,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1742 states to 1742 states and 4611 transitions. [2021-08-06 19:31:49,594 INFO L78 Accepts]: Start accepts. Automaton has 1742 states and 4611 transitions. Word has length 20 [2021-08-06 19:31:49,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:49,594 INFO L470 AbstractCegarLoop]: Abstraction has 1742 states and 4611 transitions. [2021-08-06 19:31:49,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:49,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1742 states and 4611 transitions. [2021-08-06 19:31:49,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:31:49,595 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:49,595 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:49,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:49,809 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,SelfDestructingSolverStorable65 [2021-08-06 19:31:49,809 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:49,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:49,809 INFO L82 PathProgramCache]: Analyzing trace with hash -2107933506, now seen corresponding path program 63 times [2021-08-06 19:31:49,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:49,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733607089] [2021-08-06 19:31:49,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:49,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:49,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:49,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:49,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733607089] [2021-08-06 19:31:49,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733607089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:49,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280717333] [2021-08-06 19:31:49,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:31:49,882 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:49,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:49,883 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:49,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 19:31:50,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:31:50,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:50,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:31:50,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:50,395 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:50,395 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:50,410 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:50,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280717333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:50,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:50,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 19:31:50,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45433490] [2021-08-06 19:31:50,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:31:50,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:50,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:31:50,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:31:50,411 INFO L87 Difference]: Start difference. First operand 1742 states and 4611 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:50,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:50,541 INFO L93 Difference]: Finished difference Result 2614 states and 6809 transitions. [2021-08-06 19:31:50,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:31:50,542 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:31:50,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:50,546 INFO L225 Difference]: With dead ends: 2614 [2021-08-06 19:31:50,546 INFO L226 Difference]: Without dead ends: 2614 [2021-08-06 19:31:50,546 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:31:50,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2614 states. [2021-08-06 19:31:50,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2614 to 2377. [2021-08-06 19:31:50,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 2376 states have (on average 2.691919191919192) internal successors, (6396), 2376 states have internal predecessors, (6396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:50,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 6396 transitions. [2021-08-06 19:31:50,579 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 6396 transitions. Word has length 20 [2021-08-06 19:31:50,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:50,579 INFO L470 AbstractCegarLoop]: Abstraction has 2377 states and 6396 transitions. [2021-08-06 19:31:50,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:50,579 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 6396 transitions. [2021-08-06 19:31:50,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:31:50,581 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:50,581 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:50,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:50,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:50,804 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:50,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:50,804 INFO L82 PathProgramCache]: Analyzing trace with hash -782359728, now seen corresponding path program 64 times [2021-08-06 19:31:50,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:50,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599302376] [2021-08-06 19:31:50,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:50,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:50,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:50,876 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:50,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:50,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599302376] [2021-08-06 19:31:50,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599302376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:50,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733517608] [2021-08-06 19:31:50,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:31:50,876 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:50,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:50,877 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:50,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 19:31:51,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:31:51,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:51,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:31:51,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:51,428 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:31:51,428 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:31:51,442 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:51,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733517608] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:51,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:51,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:31:51,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617014947] [2021-08-06 19:31:51,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:31:51,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:51,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:31:51,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:31:51,443 INFO L87 Difference]: Start difference. First operand 2377 states and 6396 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:51,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:51,541 INFO L93 Difference]: Finished difference Result 2570 states and 6789 transitions. [2021-08-06 19:31:51,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:31:51,541 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:31:51,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:51,543 INFO L225 Difference]: With dead ends: 2570 [2021-08-06 19:31:51,543 INFO L226 Difference]: Without dead ends: 2569 [2021-08-06 19:31:51,543 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:31:51,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2021-08-06 19:31:51,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 2497. [2021-08-06 19:31:51,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2497 states, 2496 states have (on average 2.671073717948718) internal successors, (6667), 2496 states have internal predecessors, (6667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:51,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2497 states to 2497 states and 6667 transitions. [2021-08-06 19:31:51,573 INFO L78 Accepts]: Start accepts. Automaton has 2497 states and 6667 transitions. Word has length 20 [2021-08-06 19:31:51,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:51,573 INFO L470 AbstractCegarLoop]: Abstraction has 2497 states and 6667 transitions. [2021-08-06 19:31:51,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:51,573 INFO L276 IsEmpty]: Start isEmpty. Operand 2497 states and 6667 transitions. [2021-08-06 19:31:51,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:31:51,575 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:51,575 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:51,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:51,792 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,SelfDestructingSolverStorable67 [2021-08-06 19:31:51,792 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:51,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:51,793 INFO L82 PathProgramCache]: Analyzing trace with hash 19256500, now seen corresponding path program 65 times [2021-08-06 19:31:51,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:51,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240305239] [2021-08-06 19:31:51,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:51,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:51,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:51,877 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:51,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:51,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240305239] [2021-08-06 19:31:51,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240305239] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:51,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779290001] [2021-08-06 19:31:51,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:31:51,877 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:51,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:51,878 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:51,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 19:31:52,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:31:52,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:52,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:31:52,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:52,411 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:52,412 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:52,423 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:52,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779290001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:52,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:52,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:31:52,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150228698] [2021-08-06 19:31:52,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:31:52,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:52,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:31:52,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:31:52,424 INFO L87 Difference]: Start difference. First operand 2497 states and 6667 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:52,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:52,496 INFO L93 Difference]: Finished difference Result 2576 states and 6767 transitions. [2021-08-06 19:31:52,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:31:52,497 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:31:52,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:52,499 INFO L225 Difference]: With dead ends: 2576 [2021-08-06 19:31:52,499 INFO L226 Difference]: Without dead ends: 2576 [2021-08-06 19:31:52,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 70.4ms TimeCoverageRelationStatistics Valid=112, Invalid=160, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:31:52,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2021-08-06 19:31:52,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 2445. [2021-08-06 19:31:52,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2445 states, 2444 states have (on average 2.6681669394435352) internal successors, (6521), 2444 states have internal predecessors, (6521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:52,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2445 states to 2445 states and 6521 transitions. [2021-08-06 19:31:52,529 INFO L78 Accepts]: Start accepts. Automaton has 2445 states and 6521 transitions. Word has length 20 [2021-08-06 19:31:52,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:52,529 INFO L470 AbstractCegarLoop]: Abstraction has 2445 states and 6521 transitions. [2021-08-06 19:31:52,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:52,529 INFO L276 IsEmpty]: Start isEmpty. Operand 2445 states and 6521 transitions. [2021-08-06 19:31:52,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:31:52,531 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:52,531 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:52,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:52,747 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,SelfDestructingSolverStorable68 [2021-08-06 19:31:52,748 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:52,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:52,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1794263862, now seen corresponding path program 66 times [2021-08-06 19:31:52,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:52,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553097164] [2021-08-06 19:31:52,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:52,748 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:52,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:52,818 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:52,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:52,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553097164] [2021-08-06 19:31:52,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553097164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:52,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481465082] [2021-08-06 19:31:52,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:31:52,818 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:52,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:52,819 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:52,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 19:31:53,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:31:53,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:53,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:31:53,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:53,339 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:53,340 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:53,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481465082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:53,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:53,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:31:53,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58492645] [2021-08-06 19:31:53,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:31:53,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:53,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:31:53,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:31:53,355 INFO L87 Difference]: Start difference. First operand 2445 states and 6521 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:53,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:53,415 INFO L93 Difference]: Finished difference Result 2512 states and 6509 transitions. [2021-08-06 19:31:53,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:31:53,415 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:31:53,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:53,418 INFO L225 Difference]: With dead ends: 2512 [2021-08-06 19:31:53,418 INFO L226 Difference]: Without dead ends: 2512 [2021-08-06 19:31:53,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:31:53,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2021-08-06 19:31:53,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 2381. [2021-08-06 19:31:53,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 2.653361344537815) internal successors, (6315), 2380 states have internal predecessors, (6315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:53,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 6315 transitions. [2021-08-06 19:31:53,465 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 6315 transitions. Word has length 20 [2021-08-06 19:31:53,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:53,465 INFO L470 AbstractCegarLoop]: Abstraction has 2381 states and 6315 transitions. [2021-08-06 19:31:53,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:53,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 6315 transitions. [2021-08-06 19:31:53,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:31:53,467 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:53,467 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:53,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:53,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-06 19:31:53,684 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:53,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:53,685 INFO L82 PathProgramCache]: Analyzing trace with hash -790090126, now seen corresponding path program 67 times [2021-08-06 19:31:53,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:53,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077080630] [2021-08-06 19:31:53,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:53,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:53,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:53,770 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:53,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:53,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077080630] [2021-08-06 19:31:53,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077080630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:53,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866932327] [2021-08-06 19:31:53,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:31:53,770 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:53,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:53,785 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:53,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 19:31:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:54,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:31:54,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:54,382 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:54,382 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:54,401 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:54,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866932327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:54,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:54,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 19:31:54,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043781246] [2021-08-06 19:31:54,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:31:54,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:54,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:31:54,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:31:54,402 INFO L87 Difference]: Start difference. First operand 2381 states and 6315 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:54,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:54,488 INFO L93 Difference]: Finished difference Result 2579 states and 6619 transitions. [2021-08-06 19:31:54,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:31:54,489 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:31:54,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:54,491 INFO L225 Difference]: With dead ends: 2579 [2021-08-06 19:31:54,491 INFO L226 Difference]: Without dead ends: 2579 [2021-08-06 19:31:54,492 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:31:54,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2579 states. [2021-08-06 19:31:54,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2579 to 2299. [2021-08-06 19:31:54,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2298 states have (on average 2.63881636205396) internal successors, (6064), 2298 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:54,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 6064 transitions. [2021-08-06 19:31:54,516 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 6064 transitions. Word has length 20 [2021-08-06 19:31:54,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:54,516 INFO L470 AbstractCegarLoop]: Abstraction has 2299 states and 6064 transitions. [2021-08-06 19:31:54,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:54,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 6064 transitions. [2021-08-06 19:31:54,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:31:54,518 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:54,518 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:54,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:54,733 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,SelfDestructingSolverStorable70 [2021-08-06 19:31:54,733 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:54,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:54,733 INFO L82 PathProgramCache]: Analyzing trace with hash 699314870, now seen corresponding path program 68 times [2021-08-06 19:31:54,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:54,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644955253] [2021-08-06 19:31:54,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:54,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:54,806 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:54,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:54,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644955253] [2021-08-06 19:31:54,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644955253] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:54,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759244527] [2021-08-06 19:31:54,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:31:54,807 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:54,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:54,808 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:54,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 19:31:55,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:31:55,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:55,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:31:55,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:55,205 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:55,205 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:55,221 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:55,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759244527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:55,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:55,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 19:31:55,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722486786] [2021-08-06 19:31:55,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:31:55,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:55,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:31:55,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:31:55,222 INFO L87 Difference]: Start difference. First operand 2299 states and 6064 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:55,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:55,309 INFO L93 Difference]: Finished difference Result 3852 states and 10160 transitions. [2021-08-06 19:31:55,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:31:55,310 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:31:55,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:55,314 INFO L225 Difference]: With dead ends: 3852 [2021-08-06 19:31:55,314 INFO L226 Difference]: Without dead ends: 3852 [2021-08-06 19:31:55,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:31:55,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3852 states. [2021-08-06 19:31:55,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3852 to 3727. [2021-08-06 19:31:55,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3727 states, 3726 states have (on average 2.6760601180891035) internal successors, (9971), 3726 states have internal predecessors, (9971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:55,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3727 states to 3727 states and 9971 transitions. [2021-08-06 19:31:55,367 INFO L78 Accepts]: Start accepts. Automaton has 3727 states and 9971 transitions. Word has length 20 [2021-08-06 19:31:55,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:55,367 INFO L470 AbstractCegarLoop]: Abstraction has 3727 states and 9971 transitions. [2021-08-06 19:31:55,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:55,367 INFO L276 IsEmpty]: Start isEmpty. Operand 3727 states and 9971 transitions. [2021-08-06 19:31:55,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:31:55,369 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:55,369 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:55,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:55,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:55,585 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:55,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:55,585 INFO L82 PathProgramCache]: Analyzing trace with hash -373770510, now seen corresponding path program 69 times [2021-08-06 19:31:55,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:55,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376006018] [2021-08-06 19:31:55,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:55,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:55,665 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:55,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:55,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376006018] [2021-08-06 19:31:55,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376006018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:55,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467481154] [2021-08-06 19:31:55,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:31:55,666 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:55,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:55,667 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:55,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 19:31:56,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:31:56,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:56,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:31:56,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:56,217 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:56,217 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:56,231 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:56,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467481154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:56,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:56,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 19:31:56,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660964199] [2021-08-06 19:31:56,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:31:56,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:56,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:31:56,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:31:56,232 INFO L87 Difference]: Start difference. First operand 3727 states and 9971 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:56,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:56,353 INFO L93 Difference]: Finished difference Result 4676 states and 12432 transitions. [2021-08-06 19:31:56,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:31:56,354 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:31:56,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:56,359 INFO L225 Difference]: With dead ends: 4676 [2021-08-06 19:31:56,359 INFO L226 Difference]: Without dead ends: 4676 [2021-08-06 19:31:56,359 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:31:56,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4676 states. [2021-08-06 19:31:56,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4676 to 4577. [2021-08-06 19:31:56,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4577 states, 4576 states have (on average 2.6855332167832167) internal successors, (12289), 4576 states have internal predecessors, (12289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:56,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4577 states to 4577 states and 12289 transitions. [2021-08-06 19:31:56,419 INFO L78 Accepts]: Start accepts. Automaton has 4577 states and 12289 transitions. Word has length 20 [2021-08-06 19:31:56,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:56,419 INFO L470 AbstractCegarLoop]: Abstraction has 4577 states and 12289 transitions. [2021-08-06 19:31:56,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:56,419 INFO L276 IsEmpty]: Start isEmpty. Operand 4577 states and 12289 transitions. [2021-08-06 19:31:56,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:31:56,422 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:56,422 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:56,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:56,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:56,639 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:56,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:56,639 INFO L82 PathProgramCache]: Analyzing trace with hash 720321078, now seen corresponding path program 70 times [2021-08-06 19:31:56,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:56,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848598846] [2021-08-06 19:31:56,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:56,639 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:56,722 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:56,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:56,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848598846] [2021-08-06 19:31:56,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848598846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:56,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736048162] [2021-08-06 19:31:56,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:31:56,722 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:56,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:56,723 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:56,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 19:31:57,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:31:57,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:57,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:31:57,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:57,287 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:57,287 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:57,301 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:57,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736048162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:57,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:57,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 19:31:57,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316168075] [2021-08-06 19:31:57,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:31:57,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:57,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:31:57,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:31:57,302 INFO L87 Difference]: Start difference. First operand 4577 states and 12289 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:57,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:57,488 INFO L93 Difference]: Finished difference Result 5243 states and 13900 transitions. [2021-08-06 19:31:57,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:31:57,489 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:31:57,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:57,494 INFO L225 Difference]: With dead ends: 5243 [2021-08-06 19:31:57,494 INFO L226 Difference]: Without dead ends: 5243 [2021-08-06 19:31:57,494 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 162.0ms TimeCoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:31:57,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5243 states. [2021-08-06 19:31:57,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5243 to 5098. [2021-08-06 19:31:57,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5098 states, 5097 states have (on average 2.67941926623504) internal successors, (13657), 5097 states have internal predecessors, (13657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:57,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5098 states to 5098 states and 13657 transitions. [2021-08-06 19:31:57,568 INFO L78 Accepts]: Start accepts. Automaton has 5098 states and 13657 transitions. Word has length 20 [2021-08-06 19:31:57,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:57,568 INFO L470 AbstractCegarLoop]: Abstraction has 5098 states and 13657 transitions. [2021-08-06 19:31:57,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:57,568 INFO L276 IsEmpty]: Start isEmpty. Operand 5098 states and 13657 transitions. [2021-08-06 19:31:57,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:31:57,571 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:57,571 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:57,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:57,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:57,788 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:57,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:57,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1351374978, now seen corresponding path program 71 times [2021-08-06 19:31:57,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:57,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737687964] [2021-08-06 19:31:57,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:57,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:57,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:57,849 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:31:57,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:57,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737687964] [2021-08-06 19:31:57,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737687964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:57,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476952141] [2021-08-06 19:31:57,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:31:57,850 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:57,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:57,850 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:57,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-06 19:31:58,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:31:58,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:58,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:31:58,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:58,417 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:31:58,417 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:31:58,434 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:31:58,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476952141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:58,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:58,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:31:58,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265077497] [2021-08-06 19:31:58,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:31:58,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:58,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:31:58,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:31:58,435 INFO L87 Difference]: Start difference. First operand 5098 states and 13657 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:58,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:58,561 INFO L93 Difference]: Finished difference Result 6354 states and 16973 transitions. [2021-08-06 19:31:58,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:31:58,561 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:31:58,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:58,568 INFO L225 Difference]: With dead ends: 6354 [2021-08-06 19:31:58,568 INFO L226 Difference]: Without dead ends: 6352 [2021-08-06 19:31:58,569 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:31:58,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6352 states. [2021-08-06 19:31:58,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6352 to 6311. [2021-08-06 19:31:58,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6311 states, 6310 states have (on average 2.6838351822503963) internal successors, (16935), 6310 states have internal predecessors, (16935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:58,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6311 states to 6311 states and 16935 transitions. [2021-08-06 19:31:58,655 INFO L78 Accepts]: Start accepts. Automaton has 6311 states and 16935 transitions. Word has length 20 [2021-08-06 19:31:58,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:58,655 INFO L470 AbstractCegarLoop]: Abstraction has 6311 states and 16935 transitions. [2021-08-06 19:31:58,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:58,655 INFO L276 IsEmpty]: Start isEmpty. Operand 6311 states and 16935 transitions. [2021-08-06 19:31:58,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:31:58,658 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:58,658 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:58,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:58,875 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,SelfDestructingSolverStorable74 [2021-08-06 19:31:58,875 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:58,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:58,875 INFO L82 PathProgramCache]: Analyzing trace with hash 2023891610, now seen corresponding path program 72 times [2021-08-06 19:31:58,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:58,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57052470] [2021-08-06 19:31:58,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:58,875 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:58,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:58,937 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:31:58,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:58,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57052470] [2021-08-06 19:31:58,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57052470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:58,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638737829] [2021-08-06 19:31:58,938 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:31:58,938 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:58,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:58,938 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:58,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-06 19:31:59,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:31:59,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:59,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:31:59,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:59,529 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:59,529 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:31:59,541 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:31:59,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638737829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:59,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:59,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:31:59,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411541259] [2021-08-06 19:31:59,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:31:59,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:59,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:31:59,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:31:59,542 INFO L87 Difference]: Start difference. First operand 6311 states and 16935 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:59,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:59,638 INFO L93 Difference]: Finished difference Result 6428 states and 17187 transitions. [2021-08-06 19:31:59,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:31:59,638 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:31:59,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:59,645 INFO L225 Difference]: With dead ends: 6428 [2021-08-06 19:31:59,646 INFO L226 Difference]: Without dead ends: 6428 [2021-08-06 19:31:59,646 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:31:59,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6428 states. [2021-08-06 19:31:59,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6428 to 6343. [2021-08-06 19:31:59,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6343 states, 6342 states have (on average 2.685272784610533) internal successors, (17030), 6342 states have internal predecessors, (17030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:59,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6343 states to 6343 states and 17030 transitions. [2021-08-06 19:31:59,725 INFO L78 Accepts]: Start accepts. Automaton has 6343 states and 17030 transitions. Word has length 20 [2021-08-06 19:31:59,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:59,725 INFO L470 AbstractCegarLoop]: Abstraction has 6343 states and 17030 transitions. [2021-08-06 19:31:59,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:59,725 INFO L276 IsEmpty]: Start isEmpty. Operand 6343 states and 17030 transitions. [2021-08-06 19:31:59,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:31:59,728 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:59,728 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:59,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:59,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:59,941 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:59,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:59,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1182428098, now seen corresponding path program 73 times [2021-08-06 19:31:59,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:59,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945946306] [2021-08-06 19:31:59,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:59,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:00,008 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:00,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:00,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945946306] [2021-08-06 19:32:00,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945946306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:00,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495201010] [2021-08-06 19:32:00,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:32:00,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:00,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:00,010 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:00,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-06 19:32:00,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:00,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:00,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:00,574 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:00,575 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:00,589 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:32:00,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495201010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:00,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:00,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:32:00,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668143618] [2021-08-06 19:32:00,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:32:00,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:00,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:32:00,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:32:00,590 INFO L87 Difference]: Start difference. First operand 6343 states and 17030 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:00,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:00,742 INFO L93 Difference]: Finished difference Result 6900 states and 18302 transitions. [2021-08-06 19:32:00,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:32:00,743 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:00,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:00,749 INFO L225 Difference]: With dead ends: 6900 [2021-08-06 19:32:00,749 INFO L226 Difference]: Without dead ends: 6900 [2021-08-06 19:32:00,750 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:32:00,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6900 states. [2021-08-06 19:32:00,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6900 to 6699. [2021-08-06 19:32:00,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6699 states, 6698 states have (on average 2.679008659301284) internal successors, (17944), 6698 states have internal predecessors, (17944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:00,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6699 states to 6699 states and 17944 transitions. [2021-08-06 19:32:00,837 INFO L78 Accepts]: Start accepts. Automaton has 6699 states and 17944 transitions. Word has length 20 [2021-08-06 19:32:00,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:00,837 INFO L470 AbstractCegarLoop]: Abstraction has 6699 states and 17944 transitions. [2021-08-06 19:32:00,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:00,837 INFO L276 IsEmpty]: Start isEmpty. Operand 6699 states and 17944 transitions. [2021-08-06 19:32:00,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:00,840 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:00,841 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:00,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-08-06 19:32:01,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:01,058 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:01,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:01,058 INFO L82 PathProgramCache]: Analyzing trace with hash -88336510, now seen corresponding path program 74 times [2021-08-06 19:32:01,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:01,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24298677] [2021-08-06 19:32:01,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:01,059 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:01,123 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:01,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:01,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24298677] [2021-08-06 19:32:01,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24298677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:01,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201936157] [2021-08-06 19:32:01,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:32:01,123 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:01,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:01,124 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:01,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-06 19:32:01,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:32:01,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:01,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:01,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:01,701 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:01,702 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:01,716 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:01,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201936157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:01,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:01,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:32:01,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947828773] [2021-08-06 19:32:01,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:32:01,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:01,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:32:01,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:32:01,717 INFO L87 Difference]: Start difference. First operand 6699 states and 17944 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:01,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:01,830 INFO L93 Difference]: Finished difference Result 8159 states and 21507 transitions. [2021-08-06 19:32:01,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:32:01,830 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:01,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:01,841 INFO L225 Difference]: With dead ends: 8159 [2021-08-06 19:32:01,841 INFO L226 Difference]: Without dead ends: 8159 [2021-08-06 19:32:01,841 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:32:01,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8159 states. [2021-08-06 19:32:01,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8159 to 7742. [2021-08-06 19:32:01,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7742 states, 7741 states have (on average 2.679111225939801) internal successors, (20739), 7741 states have internal predecessors, (20739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:01,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7742 states to 7742 states and 20739 transitions. [2021-08-06 19:32:01,954 INFO L78 Accepts]: Start accepts. Automaton has 7742 states and 20739 transitions. Word has length 20 [2021-08-06 19:32:01,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:01,954 INFO L470 AbstractCegarLoop]: Abstraction has 7742 states and 20739 transitions. [2021-08-06 19:32:01,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:01,954 INFO L276 IsEmpty]: Start isEmpty. Operand 7742 states and 20739 transitions. [2021-08-06 19:32:01,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:01,957 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:01,957 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:01,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:02,174 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,SelfDestructingSolverStorable77 [2021-08-06 19:32:02,174 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:02,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:02,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1161421890, now seen corresponding path program 75 times [2021-08-06 19:32:02,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:02,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016277088] [2021-08-06 19:32:02,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:02,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:02,249 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:02,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:02,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016277088] [2021-08-06 19:32:02,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016277088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:02,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740252883] [2021-08-06 19:32:02,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:32:02,250 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:02,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:02,251 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:02,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-06 19:32:02,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:32:02,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:02,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:02,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:02,867 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:02,868 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:02,882 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:02,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740252883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:02,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:02,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:32:02,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470831926] [2021-08-06 19:32:02,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:32:02,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:02,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:32:02,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:32:02,883 INFO L87 Difference]: Start difference. First operand 7742 states and 20739 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:03,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:03,027 INFO L93 Difference]: Finished difference Result 8272 states and 22019 transitions. [2021-08-06 19:32:03,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:32:03,027 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:03,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:03,038 INFO L225 Difference]: With dead ends: 8272 [2021-08-06 19:32:03,038 INFO L226 Difference]: Without dead ends: 8272 [2021-08-06 19:32:03,039 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 111.8ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:32:03,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8272 states. [2021-08-06 19:32:03,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8272 to 8144. [2021-08-06 19:32:03,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8144 states, 8143 states have (on average 2.678128453886774) internal successors, (21808), 8143 states have internal predecessors, (21808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:03,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8144 states to 8144 states and 21808 transitions. [2021-08-06 19:32:03,156 INFO L78 Accepts]: Start accepts. Automaton has 8144 states and 21808 transitions. Word has length 20 [2021-08-06 19:32:03,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:03,156 INFO L470 AbstractCegarLoop]: Abstraction has 8144 states and 21808 transitions. [2021-08-06 19:32:03,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:03,156 INFO L276 IsEmpty]: Start isEmpty. Operand 8144 states and 21808 transitions. [2021-08-06 19:32:03,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:03,160 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:03,160 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:03,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:03,377 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,SelfDestructingSolverStorable78 [2021-08-06 19:32:03,377 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:03,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:03,378 INFO L82 PathProgramCache]: Analyzing trace with hash -531235650, now seen corresponding path program 76 times [2021-08-06 19:32:03,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:03,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895852610] [2021-08-06 19:32:03,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:03,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:03,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:03,455 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:03,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:03,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895852610] [2021-08-06 19:32:03,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895852610] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:03,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831291186] [2021-08-06 19:32:03,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:32:03,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:03,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:03,456 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:03,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-06 19:32:04,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:32:04,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:04,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:04,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:04,078 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:04,079 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:04,093 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:04,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831291186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:04,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:04,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 19:32:04,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479507339] [2021-08-06 19:32:04,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:32:04,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:04,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:32:04,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:32:04,094 INFO L87 Difference]: Start difference. First operand 8144 states and 21808 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:04,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:04,216 INFO L93 Difference]: Finished difference Result 8764 states and 23053 transitions. [2021-08-06 19:32:04,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:32:04,216 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:04,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:04,229 INFO L225 Difference]: With dead ends: 8764 [2021-08-06 19:32:04,229 INFO L226 Difference]: Without dead ends: 8764 [2021-08-06 19:32:04,229 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:32:04,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8764 states. [2021-08-06 19:32:04,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8764 to 3704. [2021-08-06 19:32:04,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3704 states, 3703 states have (on average 2.614366729678639) internal successors, (9681), 3703 states have internal predecessors, (9681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:04,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3704 states to 3704 states and 9681 transitions. [2021-08-06 19:32:04,326 INFO L78 Accepts]: Start accepts. Automaton has 3704 states and 9681 transitions. Word has length 20 [2021-08-06 19:32:04,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:04,326 INFO L470 AbstractCegarLoop]: Abstraction has 3704 states and 9681 transitions. [2021-08-06 19:32:04,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:04,326 INFO L276 IsEmpty]: Start isEmpty. Operand 3704 states and 9681 transitions. [2021-08-06 19:32:04,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:04,329 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:04,329 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:04,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:04,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:04,546 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:04,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:04,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1604321030, now seen corresponding path program 77 times [2021-08-06 19:32:04,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:04,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340716635] [2021-08-06 19:32:04,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:04,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:04,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:04,629 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:04,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:04,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340716635] [2021-08-06 19:32:04,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340716635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:04,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597293325] [2021-08-06 19:32:04,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:32:04,629 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:04,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:04,630 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:04,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-06 19:32:05,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:32:05,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:05,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:05,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:05,237 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:05,237 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:05,251 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:05,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597293325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:05,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:05,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 19:32:05,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576383685] [2021-08-06 19:32:05,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:32:05,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:05,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:32:05,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:32:05,252 INFO L87 Difference]: Start difference. First operand 3704 states and 9681 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:05,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:05,361 INFO L93 Difference]: Finished difference Result 5103 states and 13210 transitions. [2021-08-06 19:32:05,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:32:05,362 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:05,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:05,367 INFO L225 Difference]: With dead ends: 5103 [2021-08-06 19:32:05,367 INFO L226 Difference]: Without dead ends: 5103 [2021-08-06 19:32:05,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:32:05,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5103 states. [2021-08-06 19:32:05,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5103 to 4011. [2021-08-06 19:32:05,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4011 states, 4010 states have (on average 2.617456359102244) internal successors, (10496), 4010 states have internal predecessors, (10496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:05,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4011 states to 4011 states and 10496 transitions. [2021-08-06 19:32:05,420 INFO L78 Accepts]: Start accepts. Automaton has 4011 states and 10496 transitions. Word has length 20 [2021-08-06 19:32:05,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:05,420 INFO L470 AbstractCegarLoop]: Abstraction has 4011 states and 10496 transitions. [2021-08-06 19:32:05,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:05,420 INFO L276 IsEmpty]: Start isEmpty. Operand 4011 states and 10496 transitions. [2021-08-06 19:32:05,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:05,423 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:05,423 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:05,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-06 19:32:05,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:05,641 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:05,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:05,641 INFO L82 PathProgramCache]: Analyzing trace with hash -510229442, now seen corresponding path program 78 times [2021-08-06 19:32:05,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:05,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626095292] [2021-08-06 19:32:05,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:05,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:05,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:05,740 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:05,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:05,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626095292] [2021-08-06 19:32:05,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626095292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:05,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976845187] [2021-08-06 19:32:05,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:32:05,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:05,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:05,741 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:05,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-06 19:32:06,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:32:06,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:06,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:06,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:06,355 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:06,356 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:06,370 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:06,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976845187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:06,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:06,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 19:32:06,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588074942] [2021-08-06 19:32:06,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:32:06,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:06,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:32:06,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:32:06,371 INFO L87 Difference]: Start difference. First operand 4011 states and 10496 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:06,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:06,549 INFO L93 Difference]: Finished difference Result 4300 states and 11136 transitions. [2021-08-06 19:32:06,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:32:06,549 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:06,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:06,553 INFO L225 Difference]: With dead ends: 4300 [2021-08-06 19:32:06,553 INFO L226 Difference]: Without dead ends: 4300 [2021-08-06 19:32:06,553 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 179.6ms TimeCoverageRelationStatistics Valid=279, Invalid=533, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:32:06,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4300 states. [2021-08-06 19:32:06,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4300 to 3971. [2021-08-06 19:32:06,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3971 states, 3970 states have (on average 2.6206549118387907) internal successors, (10404), 3970 states have internal predecessors, (10404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:06,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3971 states to 3971 states and 10404 transitions. [2021-08-06 19:32:06,600 INFO L78 Accepts]: Start accepts. Automaton has 3971 states and 10404 transitions. Word has length 20 [2021-08-06 19:32:06,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:06,600 INFO L470 AbstractCegarLoop]: Abstraction has 3971 states and 10404 transitions. [2021-08-06 19:32:06,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:06,600 INFO L276 IsEmpty]: Start isEmpty. Operand 3971 states and 10404 transitions. [2021-08-06 19:32:06,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:06,602 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:06,602 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:06,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:06,816 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,SelfDestructingSolverStorable81 [2021-08-06 19:32:06,817 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:06,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:06,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1437085596, now seen corresponding path program 79 times [2021-08-06 19:32:06,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:06,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63463794] [2021-08-06 19:32:06,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:06,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:06,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:06,890 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:06,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:06,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63463794] [2021-08-06 19:32:06,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63463794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:06,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960664573] [2021-08-06 19:32:06,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:32:06,890 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:06,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:06,891 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:06,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-06 19:32:07,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:07,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:07,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:07,616 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:32:07,617 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:32:07,634 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:07,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960664573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:07,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:07,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:32:07,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361121954] [2021-08-06 19:32:07,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:32:07,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:07,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:32:07,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:32:07,635 INFO L87 Difference]: Start difference. First operand 3971 states and 10404 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:07,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:07,767 INFO L93 Difference]: Finished difference Result 4051 states and 10498 transitions. [2021-08-06 19:32:07,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:32:07,767 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:07,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:07,773 INFO L225 Difference]: With dead ends: 4051 [2021-08-06 19:32:07,773 INFO L226 Difference]: Without dead ends: 4049 [2021-08-06 19:32:07,773 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:32:07,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4049 states. [2021-08-06 19:32:07,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4049 to 3588. [2021-08-06 19:32:07,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3588 states, 3587 states have (on average 2.613325899080011) internal successors, (9374), 3587 states have internal predecessors, (9374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:07,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3588 states to 3588 states and 9374 transitions. [2021-08-06 19:32:07,833 INFO L78 Accepts]: Start accepts. Automaton has 3588 states and 9374 transitions. Word has length 20 [2021-08-06 19:32:07,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:07,833 INFO L470 AbstractCegarLoop]: Abstraction has 3588 states and 9374 transitions. [2021-08-06 19:32:07,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:07,833 INFO L276 IsEmpty]: Start isEmpty. Operand 3588 states and 9374 transitions. [2021-08-06 19:32:07,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:07,836 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:07,836 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:07,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-06 19:32:08,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:08,039 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:08,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:08,039 INFO L82 PathProgramCache]: Analyzing trace with hash -2056265472, now seen corresponding path program 80 times [2021-08-06 19:32:08,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:08,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724994437] [2021-08-06 19:32:08,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:08,039 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:08,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:08,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:08,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724994437] [2021-08-06 19:32:08,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724994437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:08,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907144626] [2021-08-06 19:32:08,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:32:08,128 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:08,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:08,128 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:08,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-06 19:32:08,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:32:08,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:08,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:08,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:08,586 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:08,587 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:08,598 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:08,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907144626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:08,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:08,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:32:08,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961536908] [2021-08-06 19:32:08,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:32:08,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:08,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:32:08,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:32:08,599 INFO L87 Difference]: Start difference. First operand 3588 states and 9374 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:08,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:08,673 INFO L93 Difference]: Finished difference Result 3674 states and 9482 transitions. [2021-08-06 19:32:08,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:32:08,673 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:08,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:08,677 INFO L225 Difference]: With dead ends: 3674 [2021-08-06 19:32:08,677 INFO L226 Difference]: Without dead ends: 3674 [2021-08-06 19:32:08,677 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=101, Invalid=139, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:32:08,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3674 states. [2021-08-06 19:32:08,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3674 to 3597. [2021-08-06 19:32:08,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3597 states, 3596 states have (on average 2.614293659621802) internal successors, (9401), 3596 states have internal predecessors, (9401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:08,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3597 states to 3597 states and 9401 transitions. [2021-08-06 19:32:08,717 INFO L78 Accepts]: Start accepts. Automaton has 3597 states and 9401 transitions. Word has length 20 [2021-08-06 19:32:08,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:08,717 INFO L470 AbstractCegarLoop]: Abstraction has 3597 states and 9401 transitions. [2021-08-06 19:32:08,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:08,717 INFO L276 IsEmpty]: Start isEmpty. Operand 3597 states and 9401 transitions. [2021-08-06 19:32:08,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:08,719 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:08,719 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:08,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:08,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:08,933 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:08,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:08,933 INFO L82 PathProgramCache]: Analyzing trace with hash -281258110, now seen corresponding path program 81 times [2021-08-06 19:32:08,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:08,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273510098] [2021-08-06 19:32:08,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:08,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:08,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:09,004 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:09,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:09,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273510098] [2021-08-06 19:32:09,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273510098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:09,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508881770] [2021-08-06 19:32:09,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:32:09,004 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:09,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:09,005 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:09,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-06 19:32:09,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:32:09,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:09,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:09,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:09,663 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:09,664 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:09,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508881770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:09,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:09,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:32:09,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48810126] [2021-08-06 19:32:09,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:32:09,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:09,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:32:09,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:32:09,679 INFO L87 Difference]: Start difference. First operand 3597 states and 9401 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:09,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:09,743 INFO L93 Difference]: Finished difference Result 3706 states and 9523 transitions. [2021-08-06 19:32:09,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:32:09,743 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:09,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:09,747 INFO L225 Difference]: With dead ends: 3706 [2021-08-06 19:32:09,747 INFO L226 Difference]: Without dead ends: 3706 [2021-08-06 19:32:09,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:32:09,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3706 states. [2021-08-06 19:32:09,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3706 to 3603. [2021-08-06 19:32:09,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3603 states, 3602 states have (on average 2.60494169905608) internal successors, (9383), 3602 states have internal predecessors, (9383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:09,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3603 states to 3603 states and 9383 transitions. [2021-08-06 19:32:09,792 INFO L78 Accepts]: Start accepts. Automaton has 3603 states and 9383 transitions. Word has length 20 [2021-08-06 19:32:09,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:09,792 INFO L470 AbstractCegarLoop]: Abstraction has 3603 states and 9383 transitions. [2021-08-06 19:32:09,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:09,792 INFO L276 IsEmpty]: Start isEmpty. Operand 3603 states and 9383 transitions. [2021-08-06 19:32:09,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:09,794 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:09,794 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:09,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:10,011 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,SelfDestructingSolverStorable84 [2021-08-06 19:32:10,011 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:10,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:10,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1429355198, now seen corresponding path program 82 times [2021-08-06 19:32:10,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:10,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323751364] [2021-08-06 19:32:10,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:10,012 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:10,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:10,086 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:10,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:10,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323751364] [2021-08-06 19:32:10,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323751364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:10,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785535867] [2021-08-06 19:32:10,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:32:10,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:10,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:10,087 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:10,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-06 19:32:10,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:32:10,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:10,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:10,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:10,731 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:10,731 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:10,745 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:10,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785535867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:10,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:10,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 19:32:10,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402240206] [2021-08-06 19:32:10,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:32:10,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:10,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:32:10,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:32:10,747 INFO L87 Difference]: Start difference. First operand 3603 states and 9383 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:10,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:10,813 INFO L93 Difference]: Finished difference Result 3660 states and 9349 transitions. [2021-08-06 19:32:10,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:32:10,813 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:10,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:10,816 INFO L225 Difference]: With dead ends: 3660 [2021-08-06 19:32:10,817 INFO L226 Difference]: Without dead ends: 3660 [2021-08-06 19:32:10,817 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:32:10,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3660 states. [2021-08-06 19:32:10,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3660 to 3446. [2021-08-06 19:32:10,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3446 states, 3445 states have (on average 2.606676342525399) internal successors, (8980), 3445 states have internal predecessors, (8980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:10,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3446 states to 3446 states and 8980 transitions. [2021-08-06 19:32:10,856 INFO L78 Accepts]: Start accepts. Automaton has 3446 states and 8980 transitions. Word has length 20 [2021-08-06 19:32:10,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:10,856 INFO L470 AbstractCegarLoop]: Abstraction has 3446 states and 8980 transitions. [2021-08-06 19:32:10,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:10,857 INFO L276 IsEmpty]: Start isEmpty. Operand 3446 states and 8980 transitions. [2021-08-06 19:32:10,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:10,858 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:10,859 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:10,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:11,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:11,076 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:11,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:11,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1376207102, now seen corresponding path program 83 times [2021-08-06 19:32:11,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:11,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614784005] [2021-08-06 19:32:11,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:11,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:11,158 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:11,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:11,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614784005] [2021-08-06 19:32:11,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614784005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:11,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85780078] [2021-08-06 19:32:11,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:32:11,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:11,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:11,159 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:11,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-06 19:32:11,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:32:11,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:11,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:11,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:11,831 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:11,832 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:11,846 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:11,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85780078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:11,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:11,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:32:11,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770481812] [2021-08-06 19:32:11,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:32:11,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:11,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:32:11,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:32:11,846 INFO L87 Difference]: Start difference. First operand 3446 states and 8980 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:11,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:11,942 INFO L93 Difference]: Finished difference Result 3689 states and 9387 transitions. [2021-08-06 19:32:11,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:32:11,942 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:11,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:11,946 INFO L225 Difference]: With dead ends: 3689 [2021-08-06 19:32:11,946 INFO L226 Difference]: Without dead ends: 3689 [2021-08-06 19:32:11,946 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:32:11,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3689 states. [2021-08-06 19:32:11,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3689 to 3445. [2021-08-06 19:32:11,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3445 states, 3444 states have (on average 2.59465737514518) internal successors, (8936), 3444 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:11,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3445 states to 3445 states and 8936 transitions. [2021-08-06 19:32:11,985 INFO L78 Accepts]: Start accepts. Automaton has 3445 states and 8936 transitions. Word has length 20 [2021-08-06 19:32:11,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:11,985 INFO L470 AbstractCegarLoop]: Abstraction has 3445 states and 8936 transitions. [2021-08-06 19:32:11,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:11,985 INFO L276 IsEmpty]: Start isEmpty. Operand 3445 states and 8936 transitions. [2021-08-06 19:32:11,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:11,987 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:11,987 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:12,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:12,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:12,204 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:12,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:12,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1845674814, now seen corresponding path program 84 times [2021-08-06 19:32:12,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:12,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867101452] [2021-08-06 19:32:12,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:12,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:12,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:12,285 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:12,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:12,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867101452] [2021-08-06 19:32:12,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867101452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:12,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577659402] [2021-08-06 19:32:12,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:32:12,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:12,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:12,287 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:12,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-06 19:32:12,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:32:12,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:12,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:12,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:12,941 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:12,942 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:12,956 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:12,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577659402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:12,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:12,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:32:12,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484119026] [2021-08-06 19:32:12,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:32:12,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:12,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:32:12,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:32:12,957 INFO L87 Difference]: Start difference. First operand 3445 states and 8936 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:13,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:13,092 INFO L93 Difference]: Finished difference Result 4396 states and 11279 transitions. [2021-08-06 19:32:13,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:32:13,092 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:13,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:13,097 INFO L225 Difference]: With dead ends: 4396 [2021-08-06 19:32:13,097 INFO L226 Difference]: Without dead ends: 4396 [2021-08-06 19:32:13,097 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:32:13,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4396 states. [2021-08-06 19:32:13,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4396 to 3655. [2021-08-06 19:32:13,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3655 states, 3654 states have (on average 2.5897646414887796) internal successors, (9463), 3654 states have internal predecessors, (9463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:13,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3655 states to 3655 states and 9463 transitions. [2021-08-06 19:32:13,141 INFO L78 Accepts]: Start accepts. Automaton has 3655 states and 9463 transitions. Word has length 20 [2021-08-06 19:32:13,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:13,141 INFO L470 AbstractCegarLoop]: Abstraction has 3655 states and 9463 transitions. [2021-08-06 19:32:13,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:13,141 INFO L276 IsEmpty]: Start isEmpty. Operand 3655 states and 9463 transitions. [2021-08-06 19:32:13,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:13,143 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:13,143 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:13,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:13,360 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,SelfDestructingSolverStorable87 [2021-08-06 19:32:13,360 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:13,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:13,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1355200894, now seen corresponding path program 85 times [2021-08-06 19:32:13,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:13,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167591491] [2021-08-06 19:32:13,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:13,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:13,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:13,448 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:13,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:13,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167591491] [2021-08-06 19:32:13,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167591491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:13,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085837137] [2021-08-06 19:32:13,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:32:13,448 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:13,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:13,449 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:13,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-06 19:32:14,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:14,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:14,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:14,132 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:14,133 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:14,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085837137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:14,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:14,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:32:14,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246876467] [2021-08-06 19:32:14,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:32:14,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:14,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:32:14,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:32:14,147 INFO L87 Difference]: Start difference. First operand 3655 states and 9463 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:14,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:14,299 INFO L93 Difference]: Finished difference Result 3991 states and 10228 transitions. [2021-08-06 19:32:14,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:32:14,299 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:14,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:14,304 INFO L225 Difference]: With dead ends: 3991 [2021-08-06 19:32:14,304 INFO L226 Difference]: Without dead ends: 3991 [2021-08-06 19:32:14,304 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 140.1ms TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:32:14,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3991 states. [2021-08-06 19:32:14,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3991 to 3755. [2021-08-06 19:32:14,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3755 states, 3754 states have (on average 2.5908364411294618) internal successors, (9726), 3754 states have internal predecessors, (9726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:14,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3755 states to 3755 states and 9726 transitions. [2021-08-06 19:32:14,348 INFO L78 Accepts]: Start accepts. Automaton has 3755 states and 9726 transitions. Word has length 20 [2021-08-06 19:32:14,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:14,348 INFO L470 AbstractCegarLoop]: Abstraction has 3755 states and 9726 transitions. [2021-08-06 19:32:14,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:14,348 INFO L276 IsEmpty]: Start isEmpty. Operand 3755 states and 9726 transitions. [2021-08-06 19:32:14,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:14,350 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:14,350 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:14,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:14,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:14,567 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:14,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:14,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1798100034, now seen corresponding path program 86 times [2021-08-06 19:32:14,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:14,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140674876] [2021-08-06 19:32:14,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:14,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:14,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:14,653 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:14,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:14,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140674876] [2021-08-06 19:32:14,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140674876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:14,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062749332] [2021-08-06 19:32:14,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:32:14,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:14,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:14,655 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:14,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-06 19:32:15,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:32:15,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:15,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:15,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:15,331 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:15,332 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:15,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062749332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:15,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:15,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:32:15,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158841304] [2021-08-06 19:32:15,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:32:15,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:15,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:32:15,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:32:15,347 INFO L87 Difference]: Start difference. First operand 3755 states and 9726 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:15,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:15,568 INFO L93 Difference]: Finished difference Result 4197 states and 10708 transitions. [2021-08-06 19:32:15,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 19:32:15,569 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:15,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:15,573 INFO L225 Difference]: With dead ends: 4197 [2021-08-06 19:32:15,573 INFO L226 Difference]: Without dead ends: 4197 [2021-08-06 19:32:15,573 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 214.2ms TimeCoverageRelationStatistics Valid=406, Invalid=784, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 19:32:15,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4197 states. [2021-08-06 19:32:15,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4197 to 4070. [2021-08-06 19:32:15,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4070 states, 4069 states have (on average 2.5785205210125337) internal successors, (10492), 4069 states have internal predecessors, (10492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:15,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4070 states to 4070 states and 10492 transitions. [2021-08-06 19:32:15,619 INFO L78 Accepts]: Start accepts. Automaton has 4070 states and 10492 transitions. Word has length 20 [2021-08-06 19:32:15,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:15,619 INFO L470 AbstractCegarLoop]: Abstraction has 4070 states and 10492 transitions. [2021-08-06 19:32:15,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:15,619 INFO L276 IsEmpty]: Start isEmpty. Operand 4070 states and 10492 transitions. [2021-08-06 19:32:15,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:15,621 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:15,621 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:15,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:15,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:15,839 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:15,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:15,839 INFO L82 PathProgramCache]: Analyzing trace with hash -843735434, now seen corresponding path program 87 times [2021-08-06 19:32:15,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:15,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012677266] [2021-08-06 19:32:15,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:15,840 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:15,905 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:15,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:15,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012677266] [2021-08-06 19:32:15,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012677266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:15,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126694286] [2021-08-06 19:32:15,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:32:15,906 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:15,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:15,906 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:15,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-06 19:32:16,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:32:16,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:16,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:16,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:16,566 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:32:16,567 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:32:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:32:16,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126694286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:16,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:16,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:32:16,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030653855] [2021-08-06 19:32:16,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:32:16,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:16,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:32:16,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:32:16,581 INFO L87 Difference]: Start difference. First operand 4070 states and 10492 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:16,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:16,703 INFO L93 Difference]: Finished difference Result 4586 states and 11752 transitions. [2021-08-06 19:32:16,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:32:16,704 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:16,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:16,709 INFO L225 Difference]: With dead ends: 4586 [2021-08-06 19:32:16,709 INFO L226 Difference]: Without dead ends: 4584 [2021-08-06 19:32:16,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:32:16,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4584 states. [2021-08-06 19:32:16,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4584 to 4162. [2021-08-06 19:32:16,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4162 states, 4161 states have (on average 2.577265080509493) internal successors, (10724), 4161 states have internal predecessors, (10724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:16,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4162 states to 4162 states and 10724 transitions. [2021-08-06 19:32:16,790 INFO L78 Accepts]: Start accepts. Automaton has 4162 states and 10724 transitions. Word has length 20 [2021-08-06 19:32:16,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:16,790 INFO L470 AbstractCegarLoop]: Abstraction has 4162 states and 10724 transitions. [2021-08-06 19:32:16,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:16,790 INFO L276 IsEmpty]: Start isEmpty. Operand 4162 states and 10724 transitions. [2021-08-06 19:32:16,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:16,792 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:16,793 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:16,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:16,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:16,994 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:16,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:16,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1763436142, now seen corresponding path program 88 times [2021-08-06 19:32:16,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:16,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527180277] [2021-08-06 19:32:16,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:16,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:17,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:17,070 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:17,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:17,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527180277] [2021-08-06 19:32:17,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527180277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:17,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206756458] [2021-08-06 19:32:17,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:32:17,071 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:17,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:17,072 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:17,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-06 19:32:17,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:32:17,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:17,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:17,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:17,749 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:17,749 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:17,761 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 29 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:32:17,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206756458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:17,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:17,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:32:17,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934038135] [2021-08-06 19:32:17,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:32:17,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:17,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:32:17,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:32:17,761 INFO L87 Difference]: Start difference. First operand 4162 states and 10724 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:17,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:17,854 INFO L93 Difference]: Finished difference Result 4332 states and 11108 transitions. [2021-08-06 19:32:17,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:32:17,854 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:17,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:17,858 INFO L225 Difference]: With dead ends: 4332 [2021-08-06 19:32:17,858 INFO L226 Difference]: Without dead ends: 4332 [2021-08-06 19:32:17,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:32:17,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4332 states. [2021-08-06 19:32:17,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4332 to 4199. [2021-08-06 19:32:17,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4199 states, 4198 states have (on average 2.580276322058123) internal successors, (10832), 4198 states have internal predecessors, (10832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:17,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 10832 transitions. [2021-08-06 19:32:17,904 INFO L78 Accepts]: Start accepts. Automaton has 4199 states and 10832 transitions. Word has length 20 [2021-08-06 19:32:17,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:17,904 INFO L470 AbstractCegarLoop]: Abstraction has 4199 states and 10832 transitions. [2021-08-06 19:32:17,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:17,904 INFO L276 IsEmpty]: Start isEmpty. Operand 4199 states and 10832 transitions. [2021-08-06 19:32:17,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:17,906 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:17,906 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:17,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:18,124 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,SelfDestructingSolverStorable91 [2021-08-06 19:32:18,124 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:18,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:18,124 INFO L82 PathProgramCache]: Analyzing trace with hash -653782346, now seen corresponding path program 89 times [2021-08-06 19:32:18,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:18,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093478367] [2021-08-06 19:32:18,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:18,124 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:18,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:18,198 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:18,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:18,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093478367] [2021-08-06 19:32:18,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093478367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:18,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816658295] [2021-08-06 19:32:18,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:32:18,199 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:18,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:18,201 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:18,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-06 19:32:18,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:32:18,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:18,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:18,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:18,757 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:18,758 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:18,773 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:18,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816658295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:18,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:18,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:32:18,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589189449] [2021-08-06 19:32:18,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:32:18,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:18,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:32:18,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:32:18,774 INFO L87 Difference]: Start difference. First operand 4199 states and 10832 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:18,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:18,906 INFO L93 Difference]: Finished difference Result 5118 states and 12935 transitions. [2021-08-06 19:32:18,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:32:18,906 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:18,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:18,911 INFO L225 Difference]: With dead ends: 5118 [2021-08-06 19:32:18,911 INFO L226 Difference]: Without dead ends: 5118 [2021-08-06 19:32:18,911 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 114.7ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:32:18,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5118 states. [2021-08-06 19:32:18,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5118 to 4869. [2021-08-06 19:32:18,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4869 states, 4868 states have (on average 2.563886606409203) internal successors, (12481), 4868 states have internal predecessors, (12481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:18,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4869 states to 4869 states and 12481 transitions. [2021-08-06 19:32:18,975 INFO L78 Accepts]: Start accepts. Automaton has 4869 states and 12481 transitions. Word has length 20 [2021-08-06 19:32:18,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:18,975 INFO L470 AbstractCegarLoop]: Abstraction has 4869 states and 12481 transitions. [2021-08-06 19:32:18,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:18,975 INFO L276 IsEmpty]: Start isEmpty. Operand 4869 states and 12481 transitions. [2021-08-06 19:32:18,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:18,977 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:18,977 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:18,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:19,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:19,193 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:19,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:19,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1096681486, now seen corresponding path program 90 times [2021-08-06 19:32:19,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:19,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013821696] [2021-08-06 19:32:19,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:19,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:19,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:19,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:19,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013821696] [2021-08-06 19:32:19,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013821696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:19,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810133931] [2021-08-06 19:32:19,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:32:19,271 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:19,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:19,272 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:19,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-06 19:32:19,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:32:19,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:19,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:19,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:19,955 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:19,956 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:19,969 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:19,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810133931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:19,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:19,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 19:32:19,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307357007] [2021-08-06 19:32:19,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:32:19,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:19,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:32:19,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:32:19,970 INFO L87 Difference]: Start difference. First operand 4869 states and 12481 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:20,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:20,112 INFO L93 Difference]: Finished difference Result 5516 states and 13820 transitions. [2021-08-06 19:32:20,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:32:20,112 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:20,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:20,118 INFO L225 Difference]: With dead ends: 5516 [2021-08-06 19:32:20,118 INFO L226 Difference]: Without dead ends: 5516 [2021-08-06 19:32:20,118 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 114.8ms TimeCoverageRelationStatistics Valid=195, Invalid=357, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:32:20,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5516 states. [2021-08-06 19:32:20,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5516 to 4003. [2021-08-06 19:32:20,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.5634682658670664) internal successors, (10259), 4002 states have internal predecessors, (10259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:20,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 10259 transitions. [2021-08-06 19:32:20,170 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 10259 transitions. Word has length 20 [2021-08-06 19:32:20,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:20,170 INFO L470 AbstractCegarLoop]: Abstraction has 4003 states and 10259 transitions. [2021-08-06 19:32:20,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:20,170 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 10259 transitions. [2021-08-06 19:32:20,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:20,172 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:20,172 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:20,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:20,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:20,389 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:20,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:20,390 INFO L82 PathProgramCache]: Analyzing trace with hash -2589898, now seen corresponding path program 91 times [2021-08-06 19:32:20,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:20,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255013047] [2021-08-06 19:32:20,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:20,390 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:20,478 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:20,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:20,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255013047] [2021-08-06 19:32:20,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255013047] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:20,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642103611] [2021-08-06 19:32:20,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:32:20,479 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:20,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:20,482 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:20,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-06 19:32:20,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:20,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:20,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:21,041 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:21,042 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:21,057 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:21,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642103611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:21,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:21,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 19:32:21,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393205081] [2021-08-06 19:32:21,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:32:21,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:21,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:32:21,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:32:21,058 INFO L87 Difference]: Start difference. First operand 4003 states and 10259 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:21,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:21,243 INFO L93 Difference]: Finished difference Result 4651 states and 11756 transitions. [2021-08-06 19:32:21,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:32:21,244 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:21,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:21,249 INFO L225 Difference]: With dead ends: 4651 [2021-08-06 19:32:21,249 INFO L226 Difference]: Without dead ends: 4651 [2021-08-06 19:32:21,249 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 169.4ms TimeCoverageRelationStatistics Valid=278, Invalid=534, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:32:21,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4651 states. [2021-08-06 19:32:21,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4651 to 4512. [2021-08-06 19:32:21,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4512 states, 4511 states have (on average 2.5526490800266015) internal successors, (11515), 4511 states have internal predecessors, (11515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:21,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4512 states to 4512 states and 11515 transitions. [2021-08-06 19:32:21,304 INFO L78 Accepts]: Start accepts. Automaton has 4512 states and 11515 transitions. Word has length 20 [2021-08-06 19:32:21,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:21,304 INFO L470 AbstractCegarLoop]: Abstraction has 4512 states and 11515 transitions. [2021-08-06 19:32:21,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:21,304 INFO L276 IsEmpty]: Start isEmpty. Operand 4512 states and 11515 transitions. [2021-08-06 19:32:21,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:21,307 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:21,307 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:21,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:21,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:21,521 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:21,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:21,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1941652938, now seen corresponding path program 92 times [2021-08-06 19:32:21,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:21,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067175024] [2021-08-06 19:32:21,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:21,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:21,600 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:21,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:21,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067175024] [2021-08-06 19:32:21,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067175024] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:21,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295252521] [2021-08-06 19:32:21,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:32:21,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:21,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:21,601 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:21,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-06 19:32:22,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:32:22,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:22,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:22,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:22,347 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:22,347 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:22,361 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:22,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295252521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:22,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:22,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:32:22,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493731218] [2021-08-06 19:32:22,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:32:22,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:22,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:32:22,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:32:22,362 INFO L87 Difference]: Start difference. First operand 4512 states and 11515 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:22,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:22,490 INFO L93 Difference]: Finished difference Result 4863 states and 12195 transitions. [2021-08-06 19:32:22,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:32:22,490 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:22,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:22,495 INFO L225 Difference]: With dead ends: 4863 [2021-08-06 19:32:22,495 INFO L226 Difference]: Without dead ends: 4863 [2021-08-06 19:32:22,495 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 115.6ms TimeCoverageRelationStatistics Valid=197, Invalid=355, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:32:22,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4863 states. [2021-08-06 19:32:22,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4863 to 3603. [2021-08-06 19:32:22,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3603 states, 3602 states have (on average 2.5638534147695724) internal successors, (9235), 3602 states have internal predecessors, (9235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:22,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3603 states to 3603 states and 9235 transitions. [2021-08-06 19:32:22,581 INFO L78 Accepts]: Start accepts. Automaton has 3603 states and 9235 transitions. Word has length 20 [2021-08-06 19:32:22,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:22,581 INFO L470 AbstractCegarLoop]: Abstraction has 3603 states and 9235 transitions. [2021-08-06 19:32:22,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:22,581 INFO L276 IsEmpty]: Start isEmpty. Operand 3603 states and 9235 transitions. [2021-08-06 19:32:22,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:22,583 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:22,583 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:22,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:22,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:22,800 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:22,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:22,801 INFO L82 PathProgramCache]: Analyzing trace with hash -847561350, now seen corresponding path program 93 times [2021-08-06 19:32:22,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:22,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356244122] [2021-08-06 19:32:22,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:22,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:22,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:22,880 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:22,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:22,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356244122] [2021-08-06 19:32:22,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356244122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:22,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888533443] [2021-08-06 19:32:22,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:32:22,881 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:22,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:22,881 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:22,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-06 19:32:23,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:32:23,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:23,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:23,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:23,596 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:23,597 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:23,611 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:23,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888533443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:23,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:23,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:32:23,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731624728] [2021-08-06 19:32:23,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:32:23,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:23,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:32:23,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:32:23,611 INFO L87 Difference]: Start difference. First operand 3603 states and 9235 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:23,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:23,747 INFO L93 Difference]: Finished difference Result 4182 states and 10563 transitions. [2021-08-06 19:32:23,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:32:23,748 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:23,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:23,752 INFO L225 Difference]: With dead ends: 4182 [2021-08-06 19:32:23,752 INFO L226 Difference]: Without dead ends: 4182 [2021-08-06 19:32:23,752 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:32:23,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4182 states. [2021-08-06 19:32:23,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4182 to 3404. [2021-08-06 19:32:23,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3404 states, 3403 states have (on average 2.5706729356450193) internal successors, (8748), 3403 states have internal predecessors, (8748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:23,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3404 states to 3404 states and 8748 transitions. [2021-08-06 19:32:23,792 INFO L78 Accepts]: Start accepts. Automaton has 3404 states and 8748 transitions. Word has length 20 [2021-08-06 19:32:23,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:23,792 INFO L470 AbstractCegarLoop]: Abstraction has 3404 states and 8748 transitions. [2021-08-06 19:32:23,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:23,792 INFO L276 IsEmpty]: Start isEmpty. Operand 3404 states and 8748 transitions. [2021-08-06 19:32:23,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:23,794 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:23,794 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:23,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:24,011 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,SelfDestructingSolverStorable96 [2021-08-06 19:32:24,011 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:24,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:24,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1290460490, now seen corresponding path program 94 times [2021-08-06 19:32:24,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:24,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612748262] [2021-08-06 19:32:24,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:24,012 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:24,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:24,094 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:24,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:24,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612748262] [2021-08-06 19:32:24,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612748262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:24,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137519686] [2021-08-06 19:32:24,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:32:24,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:24,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:24,096 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:24,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-06 19:32:24,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:32:24,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:24,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:24,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:24,829 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:24,830 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:24,847 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:24,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137519686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:24,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:24,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:32:24,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928270578] [2021-08-06 19:32:24,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:32:24,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:24,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:32:24,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:32:24,848 INFO L87 Difference]: Start difference. First operand 3404 states and 8748 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:25,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:25,097 INFO L93 Difference]: Finished difference Result 3731 states and 9437 transitions. [2021-08-06 19:32:25,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 19:32:25,097 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:25,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:25,101 INFO L225 Difference]: With dead ends: 3731 [2021-08-06 19:32:25,101 INFO L226 Difference]: Without dead ends: 3731 [2021-08-06 19:32:25,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 214.0ms TimeCoverageRelationStatistics Valid=405, Invalid=785, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 19:32:25,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3731 states. [2021-08-06 19:32:25,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3731 to 3423. [2021-08-06 19:32:25,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3423 states, 3422 states have (on average 2.5715955581531267) internal successors, (8800), 3422 states have internal predecessors, (8800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:25,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3423 states to 3423 states and 8800 transitions. [2021-08-06 19:32:25,142 INFO L78 Accepts]: Start accepts. Automaton has 3423 states and 8800 transitions. Word has length 20 [2021-08-06 19:32:25,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:25,142 INFO L470 AbstractCegarLoop]: Abstraction has 3423 states and 8800 transitions. [2021-08-06 19:32:25,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:25,142 INFO L276 IsEmpty]: Start isEmpty. Operand 3423 states and 8800 transitions. [2021-08-06 19:32:25,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:25,145 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:25,145 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:25,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-08-06 19:32:25,360 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,SelfDestructingSolverStorable97 [2021-08-06 19:32:25,361 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:25,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:25,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1520413904, now seen corresponding path program 95 times [2021-08-06 19:32:25,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:25,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887485174] [2021-08-06 19:32:25,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:25,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:25,429 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:25,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:25,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887485174] [2021-08-06 19:32:25,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887485174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:25,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680647839] [2021-08-06 19:32:25,429 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:32:25,429 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:25,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:25,430 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:25,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-06 19:32:26,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:32:26,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:26,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:26,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:26,159 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:32:26,159 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:32:26,174 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:26,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680647839] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:26,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:26,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:32:26,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469947671] [2021-08-06 19:32:26,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:32:26,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:26,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:32:26,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:32:26,175 INFO L87 Difference]: Start difference. First operand 3423 states and 8800 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:26,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:26,279 INFO L93 Difference]: Finished difference Result 3494 states and 8884 transitions. [2021-08-06 19:32:26,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:32:26,279 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:26,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:26,282 INFO L225 Difference]: With dead ends: 3494 [2021-08-06 19:32:26,282 INFO L226 Difference]: Without dead ends: 3492 [2021-08-06 19:32:26,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 87.1ms TimeCoverageRelationStatistics Valid=151, Invalid=269, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:32:26,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3492 states. [2021-08-06 19:32:26,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3492 to 3376. [2021-08-06 19:32:26,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3376 states, 3375 states have (on average 2.570666666666667) internal successors, (8676), 3375 states have internal predecessors, (8676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:26,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3376 states to 3376 states and 8676 transitions. [2021-08-06 19:32:26,323 INFO L78 Accepts]: Start accepts. Automaton has 3376 states and 8676 transitions. Word has length 20 [2021-08-06 19:32:26,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:26,323 INFO L470 AbstractCegarLoop]: Abstraction has 3376 states and 8676 transitions. [2021-08-06 19:32:26,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:26,323 INFO L276 IsEmpty]: Start isEmpty. Operand 3376 states and 8676 transitions. [2021-08-06 19:32:26,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:26,325 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:26,325 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:26,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:26,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:26,543 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:26,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:26,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1972937164, now seen corresponding path program 96 times [2021-08-06 19:32:26,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:26,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412471580] [2021-08-06 19:32:26,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:26,544 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:26,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:26,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:26,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412471580] [2021-08-06 19:32:26,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412471580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:26,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305493159] [2021-08-06 19:32:26,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:32:26,620 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:26,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:26,620 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:26,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-06 19:32:27,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:32:27,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:27,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:27,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:27,371 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:27,371 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:27,383 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:27,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305493159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:27,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:27,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:32:27,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147167832] [2021-08-06 19:32:27,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:32:27,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:27,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:32:27,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:32:27,384 INFO L87 Difference]: Start difference. First operand 3376 states and 8676 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:27,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:27,442 INFO L93 Difference]: Finished difference Result 3467 states and 8789 transitions. [2021-08-06 19:32:27,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:32:27,442 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:27,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:27,446 INFO L225 Difference]: With dead ends: 3467 [2021-08-06 19:32:27,446 INFO L226 Difference]: Without dead ends: 3467 [2021-08-06 19:32:27,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:32:27,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3467 states. [2021-08-06 19:32:27,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3467 to 3385. [2021-08-06 19:32:27,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3385 states, 3384 states have (on average 2.5718085106382977) internal successors, (8703), 3384 states have internal predecessors, (8703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:27,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3385 states to 3385 states and 8703 transitions. [2021-08-06 19:32:27,481 INFO L78 Accepts]: Start accepts. Automaton has 3385 states and 8703 transitions. Word has length 20 [2021-08-06 19:32:27,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:27,481 INFO L470 AbstractCegarLoop]: Abstraction has 3385 states and 8703 transitions. [2021-08-06 19:32:27,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:27,481 INFO L276 IsEmpty]: Start isEmpty. Operand 3385 states and 8703 transitions. [2021-08-06 19:32:27,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:27,483 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:27,483 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:27,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:27,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:27,701 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:27,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:27,701 INFO L82 PathProgramCache]: Analyzing trace with hash -197929802, now seen corresponding path program 97 times [2021-08-06 19:32:27,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:27,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498865218] [2021-08-06 19:32:27,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:27,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:27,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:27,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498865218] [2021-08-06 19:32:27,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498865218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:27,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104432908] [2021-08-06 19:32:27,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:32:27,774 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:27,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:27,774 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:27,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-06 19:32:28,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:28,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:28,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:28,514 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:28,515 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:28,529 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:28,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104432908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:28,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:28,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:32:28,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131471969] [2021-08-06 19:32:28,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:32:28,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:28,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:32:28,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:32:28,530 INFO L87 Difference]: Start difference. First operand 3385 states and 8703 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:28,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:28,595 INFO L93 Difference]: Finished difference Result 3479 states and 8826 transitions. [2021-08-06 19:32:28,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:32:28,596 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:28,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:28,599 INFO L225 Difference]: With dead ends: 3479 [2021-08-06 19:32:28,599 INFO L226 Difference]: Without dead ends: 3479 [2021-08-06 19:32:28,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:32:28,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3479 states. [2021-08-06 19:32:28,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3479 to 3382. [2021-08-06 19:32:28,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3382 states, 3381 states have (on average 2.570245489500148) internal successors, (8690), 3381 states have internal predecessors, (8690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:28,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3382 states to 3382 states and 8690 transitions. [2021-08-06 19:32:28,636 INFO L78 Accepts]: Start accepts. Automaton has 3382 states and 8690 transitions. Word has length 20 [2021-08-06 19:32:28,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:28,636 INFO L470 AbstractCegarLoop]: Abstraction has 3382 states and 8690 transitions. [2021-08-06 19:32:28,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:28,636 INFO L276 IsEmpty]: Start isEmpty. Operand 3382 states and 8690 transitions. [2021-08-06 19:32:28,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:28,637 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:28,638 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:28,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:28,854 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,SelfDestructingSolverStorable100 [2021-08-06 19:32:28,855 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:28,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:28,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1512683506, now seen corresponding path program 98 times [2021-08-06 19:32:28,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:28,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023154364] [2021-08-06 19:32:28,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:28,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:28,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:28,928 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:28,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:28,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023154364] [2021-08-06 19:32:28,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023154364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:28,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601449577] [2021-08-06 19:32:28,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:32:28,928 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:28,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:28,942 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:29,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-06 19:32:29,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:32:29,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:29,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:29,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:29,780 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:29,780 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:29,795 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:29,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601449577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:29,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:29,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 19:32:29,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625990472] [2021-08-06 19:32:29,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:32:29,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:29,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:32:29,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:32:29,795 INFO L87 Difference]: Start difference. First operand 3382 states and 8690 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:29,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:29,876 INFO L93 Difference]: Finished difference Result 3488 states and 8838 transitions. [2021-08-06 19:32:29,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:32:29,876 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:29,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:29,880 INFO L225 Difference]: With dead ends: 3488 [2021-08-06 19:32:29,880 INFO L226 Difference]: Without dead ends: 3488 [2021-08-06 19:32:29,880 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:32:29,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3488 states. [2021-08-06 19:32:29,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3488 to 3379. [2021-08-06 19:32:29,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3379 states, 3378 states have (on average 2.5689757252812315) internal successors, (8678), 3378 states have internal predecessors, (8678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:29,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3379 states to 3379 states and 8678 transitions. [2021-08-06 19:32:29,918 INFO L78 Accepts]: Start accepts. Automaton has 3379 states and 8678 transitions. Word has length 20 [2021-08-06 19:32:29,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:29,919 INFO L470 AbstractCegarLoop]: Abstraction has 3379 states and 8678 transitions. [2021-08-06 19:32:29,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:29,919 INFO L276 IsEmpty]: Start isEmpty. Operand 3379 states and 8678 transitions. [2021-08-06 19:32:29,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:29,921 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:29,921 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:29,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:30,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:30,138 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:30,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:30,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1292878794, now seen corresponding path program 99 times [2021-08-06 19:32:30,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:30,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640523696] [2021-08-06 19:32:30,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:30,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:30,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:30,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640523696] [2021-08-06 19:32:30,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640523696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:30,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542026011] [2021-08-06 19:32:30,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:32:30,212 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:30,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:30,213 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:30,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-06 19:32:30,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:32:30,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:30,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:30,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:30,791 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:30,791 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:30,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542026011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:30,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:30,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 19:32:30,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126542248] [2021-08-06 19:32:30,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:32:30,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:30,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:32:30,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:32:30,806 INFO L87 Difference]: Start difference. First operand 3379 states and 8678 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:30,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:30,870 INFO L93 Difference]: Finished difference Result 4865 states and 12170 transitions. [2021-08-06 19:32:30,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:32:30,870 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:30,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:30,875 INFO L225 Difference]: With dead ends: 4865 [2021-08-06 19:32:30,875 INFO L226 Difference]: Without dead ends: 4865 [2021-08-06 19:32:30,875 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:32:30,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4865 states. [2021-08-06 19:32:30,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4865 to 4772. [2021-08-06 19:32:30,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4772 states, 4771 states have (on average 2.5208551666317334) internal successors, (12027), 4771 states have internal predecessors, (12027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:30,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4772 states to 4772 states and 12027 transitions. [2021-08-06 19:32:30,928 INFO L78 Accepts]: Start accepts. Automaton has 4772 states and 12027 transitions. Word has length 20 [2021-08-06 19:32:30,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:30,928 INFO L470 AbstractCegarLoop]: Abstraction has 4772 states and 12027 transitions. [2021-08-06 19:32:30,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:30,928 INFO L276 IsEmpty]: Start isEmpty. Operand 4772 states and 12027 transitions. [2021-08-06 19:32:30,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:30,930 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:30,930 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:30,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:31,132 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,SelfDestructingSolverStorable102 [2021-08-06 19:32:31,132 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:31,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:31,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1929003122, now seen corresponding path program 100 times [2021-08-06 19:32:31,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:31,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110769683] [2021-08-06 19:32:31,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:31,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:31,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:31,217 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:31,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:31,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110769683] [2021-08-06 19:32:31,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110769683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:31,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10281305] [2021-08-06 19:32:31,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:32:31,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:31,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:31,233 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:31,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-06 19:32:32,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:32:32,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:32,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:32,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:32,079 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:32,079 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:32,093 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:32,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10281305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:32,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:32,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:32:32,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648990819] [2021-08-06 19:32:32,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:32:32,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:32,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:32:32,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:32:32,094 INFO L87 Difference]: Start difference. First operand 4772 states and 12027 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:32,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:32,199 INFO L93 Difference]: Finished difference Result 4919 states and 12274 transitions. [2021-08-06 19:32:32,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:32:32,199 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:32,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:32,204 INFO L225 Difference]: With dead ends: 4919 [2021-08-06 19:32:32,204 INFO L226 Difference]: Without dead ends: 4919 [2021-08-06 19:32:32,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:32:32,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4919 states. [2021-08-06 19:32:32,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4919 to 4788. [2021-08-06 19:32:32,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4788 states, 4787 states have (on average 2.518278671401713) internal successors, (12055), 4787 states have internal predecessors, (12055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:32,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4788 states to 4788 states and 12055 transitions. [2021-08-06 19:32:32,252 INFO L78 Accepts]: Start accepts. Automaton has 4788 states and 12055 transitions. Word has length 20 [2021-08-06 19:32:32,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:32,252 INFO L470 AbstractCegarLoop]: Abstraction has 4788 states and 12055 transitions. [2021-08-06 19:32:32,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:32,252 INFO L276 IsEmpty]: Start isEmpty. Operand 4788 states and 12055 transitions. [2021-08-06 19:32:32,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:32,255 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:32,255 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:32,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:32,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-06 19:32:32,472 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:32,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:32,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1271872586, now seen corresponding path program 101 times [2021-08-06 19:32:32,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:32,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117801159] [2021-08-06 19:32:32,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:32,472 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:32,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:32,555 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:32,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:32,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117801159] [2021-08-06 19:32:32,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117801159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:32,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911441154] [2021-08-06 19:32:32,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:32:32,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:32,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:32,556 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:32,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-06 19:32:33,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:32:33,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:33,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:33,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:33,322 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:33,323 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:33,337 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:33,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911441154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:33,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:33,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:32:33,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051050801] [2021-08-06 19:32:33,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:32:33,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:33,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:32:33,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:32:33,338 INFO L87 Difference]: Start difference. First operand 4788 states and 12055 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:33,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:33,450 INFO L93 Difference]: Finished difference Result 5293 states and 13177 transitions. [2021-08-06 19:32:33,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:32:33,451 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:33,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:33,456 INFO L225 Difference]: With dead ends: 5293 [2021-08-06 19:32:33,456 INFO L226 Difference]: Without dead ends: 5293 [2021-08-06 19:32:33,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 114.8ms TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:32:33,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5293 states. [2021-08-06 19:32:33,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5293 to 5250. [2021-08-06 19:32:33,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5250 states, 5249 states have (on average 2.497999618975043) internal successors, (13112), 5249 states have internal predecessors, (13112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:33,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5250 states to 5250 states and 13112 transitions. [2021-08-06 19:32:33,512 INFO L78 Accepts]: Start accepts. Automaton has 5250 states and 13112 transitions. Word has length 20 [2021-08-06 19:32:33,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:33,512 INFO L470 AbstractCegarLoop]: Abstraction has 5250 states and 13112 transitions. [2021-08-06 19:32:33,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:33,513 INFO L276 IsEmpty]: Start isEmpty. Operand 5250 states and 13112 transitions. [2021-08-06 19:32:33,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:33,515 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:33,515 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:33,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:33,732 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,SelfDestructingSolverStorable104 [2021-08-06 19:32:33,733 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:33,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:33,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1714771726, now seen corresponding path program 102 times [2021-08-06 19:32:33,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:33,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973984680] [2021-08-06 19:32:33,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:33,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:33,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:33,841 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:33,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:33,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973984680] [2021-08-06 19:32:33,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973984680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:33,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018470691] [2021-08-06 19:32:33,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:32:33,841 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:33,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:33,842 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:33,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-06 19:32:34,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:32:34,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:34,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:34,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:34,639 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:34,640 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:34,654 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:34,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018470691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:34,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:34,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:32:34,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244056995] [2021-08-06 19:32:34,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:32:34,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:34,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:32:34,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:32:34,655 INFO L87 Difference]: Start difference. First operand 5250 states and 13112 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:34,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:34,847 INFO L93 Difference]: Finished difference Result 5442 states and 13496 transitions. [2021-08-06 19:32:34,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:32:34,847 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:34,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:34,852 INFO L225 Difference]: With dead ends: 5442 [2021-08-06 19:32:34,852 INFO L226 Difference]: Without dead ends: 5442 [2021-08-06 19:32:34,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 184.1ms TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:32:34,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5442 states. [2021-08-06 19:32:34,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5442 to 5383. [2021-08-06 19:32:34,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5383 states, 5382 states have (on average 2.4895949461166853) internal successors, (13399), 5382 states have internal predecessors, (13399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:34,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5383 states to 5383 states and 13399 transitions. [2021-08-06 19:32:34,908 INFO L78 Accepts]: Start accepts. Automaton has 5383 states and 13399 transitions. Word has length 20 [2021-08-06 19:32:34,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:34,908 INFO L470 AbstractCegarLoop]: Abstraction has 5383 states and 13399 transitions. [2021-08-06 19:32:34,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:34,908 INFO L276 IsEmpty]: Start isEmpty. Operand 5383 states and 13399 transitions. [2021-08-06 19:32:34,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:34,911 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:34,911 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:34,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:35,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:35,129 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:35,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:35,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1735224118, now seen corresponding path program 103 times [2021-08-06 19:32:35,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:35,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010522495] [2021-08-06 19:32:35,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:35,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:35,220 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:35,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:35,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010522495] [2021-08-06 19:32:35,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010522495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:35,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281724518] [2021-08-06 19:32:35,221 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:32:35,221 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:35,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:35,222 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:35,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-06 19:32:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:35,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:35,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:36,061 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:36,061 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:36,075 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:36,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281724518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:36,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:36,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:32:36,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639715644] [2021-08-06 19:32:36,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:32:36,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:36,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:32:36,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:32:36,076 INFO L87 Difference]: Start difference. First operand 5383 states and 13399 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:36,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:36,338 INFO L93 Difference]: Finished difference Result 5580 states and 13774 transitions. [2021-08-06 19:32:36,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 19:32:36,339 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:36,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:36,344 INFO L225 Difference]: With dead ends: 5580 [2021-08-06 19:32:36,344 INFO L226 Difference]: Without dead ends: 5580 [2021-08-06 19:32:36,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 247.7ms TimeCoverageRelationStatistics Valid=471, Invalid=935, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 19:32:36,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5580 states. [2021-08-06 19:32:36,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5580 to 5446. [2021-08-06 19:32:36,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5446 states, 5445 states have (on average 2.484297520661157) internal successors, (13527), 5445 states have internal predecessors, (13527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:36,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5446 states to 5446 states and 13527 transitions. [2021-08-06 19:32:36,404 INFO L78 Accepts]: Start accepts. Automaton has 5446 states and 13527 transitions. Word has length 20 [2021-08-06 19:32:36,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:36,404 INFO L470 AbstractCegarLoop]: Abstraction has 5446 states and 13527 transitions. [2021-08-06 19:32:36,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:36,404 INFO L276 IsEmpty]: Start isEmpty. Operand 5446 states and 13527 transitions. [2021-08-06 19:32:36,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:36,407 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:36,407 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:36,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:36,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:36,625 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:36,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:36,625 INFO L82 PathProgramCache]: Analyzing trace with hash 2008188542, now seen corresponding path program 104 times [2021-08-06 19:32:36,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:36,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749619990] [2021-08-06 19:32:36,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:36,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:36,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:36,699 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:36,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:36,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749619990] [2021-08-06 19:32:36,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749619990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:36,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379815428] [2021-08-06 19:32:36,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:32:36,699 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:36,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:36,700 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:36,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-06 19:32:37,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:32:37,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:37,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:37,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:37,305 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:32:37,306 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:32:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:37,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379815428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:37,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:37,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:32:37,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727727111] [2021-08-06 19:32:37,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:32:37,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:37,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:32:37,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:32:37,321 INFO L87 Difference]: Start difference. First operand 5446 states and 13527 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:37,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:37,464 INFO L93 Difference]: Finished difference Result 5546 states and 13684 transitions. [2021-08-06 19:32:37,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 19:32:37,464 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:37,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:37,469 INFO L225 Difference]: With dead ends: 5546 [2021-08-06 19:32:37,469 INFO L226 Difference]: Without dead ends: 5544 [2021-08-06 19:32:37,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=207, Invalid=393, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:32:37,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5544 states. [2021-08-06 19:32:37,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5544 to 5181. [2021-08-06 19:32:37,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5181 states, 5180 states have (on average 2.4760617760617762) internal successors, (12826), 5180 states have internal predecessors, (12826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:37,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5181 states to 5181 states and 12826 transitions. [2021-08-06 19:32:37,530 INFO L78 Accepts]: Start accepts. Automaton has 5181 states and 12826 transitions. Word has length 20 [2021-08-06 19:32:37,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:37,530 INFO L470 AbstractCegarLoop]: Abstraction has 5181 states and 12826 transitions. [2021-08-06 19:32:37,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:37,530 INFO L276 IsEmpty]: Start isEmpty. Operand 5181 states and 12826 transitions. [2021-08-06 19:32:37,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:37,533 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:37,533 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:37,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:37,748 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,SelfDestructingSolverStorable107 [2021-08-06 19:32:37,749 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:37,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:37,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1088487834, now seen corresponding path program 105 times [2021-08-06 19:32:37,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:37,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835813327] [2021-08-06 19:32:37,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:37,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:37,821 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:37,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:37,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835813327] [2021-08-06 19:32:37,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835813327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:37,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538639361] [2021-08-06 19:32:37,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:32:37,822 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:37,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:37,823 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:37,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-06 19:32:38,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:32:38,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:38,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:38,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:38,677 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:38,677 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:38,688 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:38,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538639361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:38,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:38,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:32:38,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394849906] [2021-08-06 19:32:38,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:32:38,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:38,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:32:38,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:32:38,689 INFO L87 Difference]: Start difference. First operand 5181 states and 12826 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:38,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:38,790 INFO L93 Difference]: Finished difference Result 5357 states and 13211 transitions. [2021-08-06 19:32:38,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:32:38,790 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:38,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:38,796 INFO L225 Difference]: With dead ends: 5357 [2021-08-06 19:32:38,796 INFO L226 Difference]: Without dead ends: 5357 [2021-08-06 19:32:38,796 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:32:38,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5357 states. [2021-08-06 19:32:38,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5357 to 5182. [2021-08-06 19:32:38,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5182 states, 5181 states have (on average 2.4763559158463617) internal successors, (12830), 5181 states have internal predecessors, (12830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:38,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5182 states to 5182 states and 12830 transitions. [2021-08-06 19:32:38,851 INFO L78 Accepts]: Start accepts. Automaton has 5182 states and 12830 transitions. Word has length 20 [2021-08-06 19:32:38,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:38,851 INFO L470 AbstractCegarLoop]: Abstraction has 5182 states and 12830 transitions. [2021-08-06 19:32:38,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:38,851 INFO L276 IsEmpty]: Start isEmpty. Operand 5182 states and 12830 transitions. [2021-08-06 19:32:38,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:38,854 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:38,854 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:38,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:39,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:39,071 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:39,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:39,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1445633218, now seen corresponding path program 106 times [2021-08-06 19:32:39,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:39,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990844967] [2021-08-06 19:32:39,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:39,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:39,153 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:39,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:39,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990844967] [2021-08-06 19:32:39,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990844967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:39,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372648024] [2021-08-06 19:32:39,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:32:39,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:39,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:39,155 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:39,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-06 19:32:39,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:32:39,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:39,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:39,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:39,943 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:39,943 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:39,957 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:39,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372648024] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:39,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:39,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 19:32:39,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757954302] [2021-08-06 19:32:39,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:32:39,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:39,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:32:39,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:32:39,958 INFO L87 Difference]: Start difference. First operand 5182 states and 12830 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:40,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:40,179 INFO L93 Difference]: Finished difference Result 6759 states and 16321 transitions. [2021-08-06 19:32:40,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:32:40,179 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:40,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:40,187 INFO L225 Difference]: With dead ends: 6759 [2021-08-06 19:32:40,187 INFO L226 Difference]: Without dead ends: 6759 [2021-08-06 19:32:40,187 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 198.3ms TimeCoverageRelationStatistics Valid=277, Invalid=535, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:32:40,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6759 states. [2021-08-06 19:32:40,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6759 to 6383. [2021-08-06 19:32:40,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6383 states, 6382 states have (on average 2.445158257599499) internal successors, (15605), 6382 states have internal predecessors, (15605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:40,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6383 states to 6383 states and 15605 transitions. [2021-08-06 19:32:40,267 INFO L78 Accepts]: Start accepts. Automaton has 6383 states and 15605 transitions. Word has length 20 [2021-08-06 19:32:40,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:40,267 INFO L470 AbstractCegarLoop]: Abstraction has 6383 states and 15605 transitions. [2021-08-06 19:32:40,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:40,267 INFO L276 IsEmpty]: Start isEmpty. Operand 6383 states and 15605 transitions. [2021-08-06 19:32:40,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:40,270 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:40,270 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:40,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:40,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:40,485 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:40,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:40,485 INFO L82 PathProgramCache]: Analyzing trace with hash 2004362626, now seen corresponding path program 107 times [2021-08-06 19:32:40,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:40,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883984561] [2021-08-06 19:32:40,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:40,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:40,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:40,564 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:40,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:40,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883984561] [2021-08-06 19:32:40,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883984561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:40,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034967247] [2021-08-06 19:32:40,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:32:40,564 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:40,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:40,565 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:40,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-06 19:32:41,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:32:41,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:41,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:41,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:41,387 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:41,388 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:41,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034967247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:41,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:41,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:32:41,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425823041] [2021-08-06 19:32:41,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:32:41,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:41,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:32:41,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:32:41,403 INFO L87 Difference]: Start difference. First operand 6383 states and 15605 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:41,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:41,581 INFO L93 Difference]: Finished difference Result 7315 states and 17594 transitions. [2021-08-06 19:32:41,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:32:41,581 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:41,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:41,590 INFO L225 Difference]: With dead ends: 7315 [2021-08-06 19:32:41,590 INFO L226 Difference]: Without dead ends: 7315 [2021-08-06 19:32:41,590 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 162.2ms TimeCoverageRelationStatistics Valid=282, Invalid=530, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:32:41,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7315 states. [2021-08-06 19:32:41,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7315 to 5057. [2021-08-06 19:32:41,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5057 states, 5056 states have (on average 2.4580696202531644) internal successors, (12428), 5056 states have internal predecessors, (12428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:41,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5057 states to 5057 states and 12428 transitions. [2021-08-06 19:32:41,662 INFO L78 Accepts]: Start accepts. Automaton has 5057 states and 12428 transitions. Word has length 20 [2021-08-06 19:32:41,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:41,663 INFO L470 AbstractCegarLoop]: Abstraction has 5057 states and 12428 transitions. [2021-08-06 19:32:41,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:41,663 INFO L276 IsEmpty]: Start isEmpty. Operand 5057 states and 12428 transitions. [2021-08-06 19:32:41,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:41,665 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:41,666 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:41,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:41,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:41,883 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:41,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:41,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1561463486, now seen corresponding path program 108 times [2021-08-06 19:32:41,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:41,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840215294] [2021-08-06 19:32:41,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:41,884 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:41,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:41,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840215294] [2021-08-06 19:32:41,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840215294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:41,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596125099] [2021-08-06 19:32:41,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:32:41,971 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:41,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:41,972 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:41,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-06 19:32:42,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:32:42,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:42,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:42,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:42,831 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:42,831 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:42,847 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:42,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596125099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:42,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:42,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:32:42,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436053172] [2021-08-06 19:32:42,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:32:42,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:42,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:32:42,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:32:42,847 INFO L87 Difference]: Start difference. First operand 5057 states and 12428 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:43,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:43,089 INFO L93 Difference]: Finished difference Result 6077 states and 14647 transitions. [2021-08-06 19:32:43,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 19:32:43,089 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:43,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:43,098 INFO L225 Difference]: With dead ends: 6077 [2021-08-06 19:32:43,098 INFO L226 Difference]: Without dead ends: 6077 [2021-08-06 19:32:43,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 193.8ms TimeCoverageRelationStatistics Valid=404, Invalid=786, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 19:32:43,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6077 states. [2021-08-06 19:32:43,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6077 to 5123. [2021-08-06 19:32:43,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5123 states, 5122 states have (on average 2.4578289730573997) internal successors, (12589), 5122 states have internal predecessors, (12589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:43,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5123 states to 5123 states and 12589 transitions. [2021-08-06 19:32:43,166 INFO L78 Accepts]: Start accepts. Automaton has 5123 states and 12589 transitions. Word has length 20 [2021-08-06 19:32:43,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:43,166 INFO L470 AbstractCegarLoop]: Abstraction has 5123 states and 12589 transitions. [2021-08-06 19:32:43,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:43,166 INFO L276 IsEmpty]: Start isEmpty. Operand 5123 states and 12589 transitions. [2021-08-06 19:32:43,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:43,169 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:43,169 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:43,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:43,387 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,SelfDestructingSolverStorable111 [2021-08-06 19:32:43,387 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:43,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:43,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1580051390, now seen corresponding path program 109 times [2021-08-06 19:32:43,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:43,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865872326] [2021-08-06 19:32:43,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:43,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:43,473 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:43,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:43,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865872326] [2021-08-06 19:32:43,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865872326] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:43,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229169529] [2021-08-06 19:32:43,473 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:32:43,473 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:43,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:43,474 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:43,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-06 19:32:44,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:44,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:44,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:44,339 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:44,340 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:44,356 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:44,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229169529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:44,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:44,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:32:44,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253705364] [2021-08-06 19:32:44,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:32:44,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:44,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:32:44,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:32:44,357 INFO L87 Difference]: Start difference. First operand 5123 states and 12589 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:44,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:44,507 INFO L93 Difference]: Finished difference Result 5590 states and 13591 transitions. [2021-08-06 19:32:44,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:32:44,507 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:44,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:44,514 INFO L225 Difference]: With dead ends: 5590 [2021-08-06 19:32:44,514 INFO L226 Difference]: Without dead ends: 5590 [2021-08-06 19:32:44,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 148.1ms TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:32:44,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5590 states. [2021-08-06 19:32:44,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5590 to 5039. [2021-08-06 19:32:44,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5039 states, 5038 states have (on average 2.466256450972608) internal successors, (12425), 5038 states have internal predecessors, (12425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:44,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5039 states to 5039 states and 12425 transitions. [2021-08-06 19:32:44,574 INFO L78 Accepts]: Start accepts. Automaton has 5039 states and 12425 transitions. Word has length 20 [2021-08-06 19:32:44,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:44,574 INFO L470 AbstractCegarLoop]: Abstraction has 5039 states and 12425 transitions. [2021-08-06 19:32:44,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:44,574 INFO L276 IsEmpty]: Start isEmpty. Operand 5039 states and 12425 transitions. [2021-08-06 19:32:44,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:44,577 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:44,577 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:44,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-08-06 19:32:44,794 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,SelfDestructingSolverStorable112 [2021-08-06 19:32:44,795 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:44,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:44,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1137152250, now seen corresponding path program 110 times [2021-08-06 19:32:44,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:44,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659084974] [2021-08-06 19:32:44,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:44,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:44,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:44,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659084974] [2021-08-06 19:32:44,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659084974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:44,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510248779] [2021-08-06 19:32:44,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:32:44,870 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:44,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:44,871 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:44,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-06 19:32:45,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:32:45,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:45,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:45,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:45,698 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:45,698 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:45,712 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:45,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510248779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:45,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:45,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:32:45,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744085093] [2021-08-06 19:32:45,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:32:45,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:45,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:32:45,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:32:45,713 INFO L87 Difference]: Start difference. First operand 5039 states and 12425 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:45,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:45,877 INFO L93 Difference]: Finished difference Result 5250 states and 12862 transitions. [2021-08-06 19:32:45,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:32:45,877 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:45,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:45,884 INFO L225 Difference]: With dead ends: 5250 [2021-08-06 19:32:45,884 INFO L226 Difference]: Without dead ends: 5250 [2021-08-06 19:32:45,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 147.6ms TimeCoverageRelationStatistics Valid=244, Invalid=512, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:32:45,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5250 states. [2021-08-06 19:32:45,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5250 to 5103. [2021-08-06 19:32:45,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5103 states, 5102 states have (on average 2.4633477067816543) internal successors, (12568), 5102 states have internal predecessors, (12568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:45,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5103 states to 5103 states and 12568 transitions. [2021-08-06 19:32:45,942 INFO L78 Accepts]: Start accepts. Automaton has 5103 states and 12568 transitions. Word has length 20 [2021-08-06 19:32:45,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:45,942 INFO L470 AbstractCegarLoop]: Abstraction has 5103 states and 12568 transitions. [2021-08-06 19:32:45,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:45,942 INFO L276 IsEmpty]: Start isEmpty. Operand 5103 states and 12568 transitions. [2021-08-06 19:32:45,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:45,945 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:45,945 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:45,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:46,154 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,SelfDestructingSolverStorable113 [2021-08-06 19:32:46,155 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:46,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:46,155 INFO L82 PathProgramCache]: Analyzing trace with hash 292180798, now seen corresponding path program 111 times [2021-08-06 19:32:46,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:46,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446360422] [2021-08-06 19:32:46,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:46,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:46,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:46,238 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:46,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:46,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446360422] [2021-08-06 19:32:46,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446360422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:46,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63171822] [2021-08-06 19:32:46,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:32:46,239 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:46,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:46,241 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:46,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-06 19:32:46,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:32:46,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:46,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:46,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:46,913 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:46,913 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:46,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63171822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:46,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:46,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:32:46,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286410753] [2021-08-06 19:32:46,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:32:46,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:46,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:32:46,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:32:46,928 INFO L87 Difference]: Start difference. First operand 5103 states and 12568 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:47,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:47,183 INFO L93 Difference]: Finished difference Result 5301 states and 12954 transitions. [2021-08-06 19:32:47,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 19:32:47,183 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:47,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:47,189 INFO L225 Difference]: With dead ends: 5301 [2021-08-06 19:32:47,189 INFO L226 Difference]: Without dead ends: 5301 [2021-08-06 19:32:47,189 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 227.1ms TimeCoverageRelationStatistics Valid=470, Invalid=936, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 19:32:47,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5301 states. [2021-08-06 19:32:47,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5301 to 5104. [2021-08-06 19:32:47,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5104 states, 5103 states have (on average 2.4636488340192044) internal successors, (12572), 5103 states have internal predecessors, (12572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:47,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5104 states to 5104 states and 12572 transitions. [2021-08-06 19:32:47,247 INFO L78 Accepts]: Start accepts. Automaton has 5104 states and 12572 transitions. Word has length 20 [2021-08-06 19:32:47,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:47,247 INFO L470 AbstractCegarLoop]: Abstraction has 5104 states and 12572 transitions. [2021-08-06 19:32:47,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:47,247 INFO L276 IsEmpty]: Start isEmpty. Operand 5104 states and 12572 transitions. [2021-08-06 19:32:47,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:47,250 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:47,250 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:47,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:47,468 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,SelfDestructingSolverStorable114 [2021-08-06 19:32:47,468 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:47,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:47,468 INFO L82 PathProgramCache]: Analyzing trace with hash -191375844, now seen corresponding path program 112 times [2021-08-06 19:32:47,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:47,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637554752] [2021-08-06 19:32:47,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:47,468 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:47,533 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:47,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:47,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637554752] [2021-08-06 19:32:47,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637554752] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:47,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070608412] [2021-08-06 19:32:47,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:32:47,534 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:47,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:47,534 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:47,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-06 19:32:48,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:32:48,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:48,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:48,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:48,395 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:32:48,395 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:32:48,409 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:48,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070608412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:48,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:48,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:32:48,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615610101] [2021-08-06 19:32:48,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:32:48,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:48,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:32:48,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:32:48,410 INFO L87 Difference]: Start difference. First operand 5104 states and 12572 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:48,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:48,508 INFO L93 Difference]: Finished difference Result 5236 states and 12804 transitions. [2021-08-06 19:32:48,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:32:48,509 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:48,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:48,515 INFO L225 Difference]: With dead ends: 5236 [2021-08-06 19:32:48,515 INFO L226 Difference]: Without dead ends: 5234 [2021-08-06 19:32:48,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:32:48,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5234 states. [2021-08-06 19:32:48,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5234 to 5181. [2021-08-06 19:32:48,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5181 states, 5180 states have (on average 2.4617760617760616) internal successors, (12752), 5180 states have internal predecessors, (12752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:48,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5181 states to 5181 states and 12752 transitions. [2021-08-06 19:32:48,573 INFO L78 Accepts]: Start accepts. Automaton has 5181 states and 12752 transitions. Word has length 20 [2021-08-06 19:32:48,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:48,573 INFO L470 AbstractCegarLoop]: Abstraction has 5181 states and 12752 transitions. [2021-08-06 19:32:48,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:48,574 INFO L276 IsEmpty]: Start isEmpty. Operand 5181 states and 12752 transitions. [2021-08-06 19:32:48,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:48,576 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:48,576 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:48,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:48,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:48,794 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:48,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:48,794 INFO L82 PathProgramCache]: Analyzing trace with hash 610240384, now seen corresponding path program 113 times [2021-08-06 19:32:48,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:48,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674151076] [2021-08-06 19:32:48,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:48,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:48,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:48,869 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:48,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:48,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674151076] [2021-08-06 19:32:48,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674151076] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:48,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803606426] [2021-08-06 19:32:48,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:32:48,870 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:48,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:48,871 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:48,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-06 19:32:49,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:32:49,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:49,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:49,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:49,483 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:49,484 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:49,495 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:49,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803606426] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:49,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:49,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:32:49,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575776454] [2021-08-06 19:32:49,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:32:49,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:49,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:32:49,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:32:49,496 INFO L87 Difference]: Start difference. First operand 5181 states and 12752 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:49,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:49,557 INFO L93 Difference]: Finished difference Result 5277 states and 12870 transitions. [2021-08-06 19:32:49,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:32:49,558 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:49,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:49,564 INFO L225 Difference]: With dead ends: 5277 [2021-08-06 19:32:49,564 INFO L226 Difference]: Without dead ends: 5277 [2021-08-06 19:32:49,564 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 51.9ms TimeCoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:32:49,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5277 states. [2021-08-06 19:32:49,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5277 to 5190. [2021-08-06 19:32:49,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5190 states, 5189 states have (on average 2.4627095779533628) internal successors, (12779), 5189 states have internal predecessors, (12779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:49,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5190 states to 5190 states and 12779 transitions. [2021-08-06 19:32:49,618 INFO L78 Accepts]: Start accepts. Automaton has 5190 states and 12779 transitions. Word has length 20 [2021-08-06 19:32:49,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:49,619 INFO L470 AbstractCegarLoop]: Abstraction has 5190 states and 12779 transitions. [2021-08-06 19:32:49,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:49,619 INFO L276 IsEmpty]: Start isEmpty. Operand 5190 states and 12779 transitions. [2021-08-06 19:32:49,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:49,621 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:49,622 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:49,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:49,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:49,837 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:49,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:49,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1909719550, now seen corresponding path program 114 times [2021-08-06 19:32:49,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:49,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956789288] [2021-08-06 19:32:49,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:49,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:49,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:49,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:49,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956789288] [2021-08-06 19:32:49,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956789288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:49,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529812749] [2021-08-06 19:32:49,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:32:49,909 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:49,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:49,910 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:49,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-06 19:32:50,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:32:50,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:50,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:50,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:50,788 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:50,789 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:50,803 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:50,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529812749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:50,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:50,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:32:50,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231523322] [2021-08-06 19:32:50,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:32:50,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:50,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:32:50,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:32:50,804 INFO L87 Difference]: Start difference. First operand 5190 states and 12779 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:50,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:50,877 INFO L93 Difference]: Finished difference Result 5340 states and 13021 transitions. [2021-08-06 19:32:50,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:32:50,878 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:50,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:50,883 INFO L225 Difference]: With dead ends: 5340 [2021-08-06 19:32:50,883 INFO L226 Difference]: Without dead ends: 5340 [2021-08-06 19:32:50,883 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:32:50,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5340 states. [2021-08-06 19:32:50,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5340 to 5197. [2021-08-06 19:32:50,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5197 states, 5196 states have (on average 2.4618937644341803) internal successors, (12792), 5196 states have internal predecessors, (12792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:50,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5197 states to 5197 states and 12792 transitions. [2021-08-06 19:32:50,946 INFO L78 Accepts]: Start accepts. Automaton has 5197 states and 12792 transitions. Word has length 20 [2021-08-06 19:32:50,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:50,946 INFO L470 AbstractCegarLoop]: Abstraction has 5197 states and 12792 transitions. [2021-08-06 19:32:50,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:50,946 INFO L276 IsEmpty]: Start isEmpty. Operand 5197 states and 12792 transitions. [2021-08-06 19:32:50,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:50,949 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:50,949 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:50,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:51,162 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,SelfDestructingSolverStorable117 [2021-08-06 19:32:51,162 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:51,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:51,163 INFO L82 PathProgramCache]: Analyzing trace with hash -199106242, now seen corresponding path program 115 times [2021-08-06 19:32:51,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:51,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80333227] [2021-08-06 19:32:51,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:51,163 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:51,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:51,236 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:51,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:51,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80333227] [2021-08-06 19:32:51,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80333227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:51,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845634076] [2021-08-06 19:32:51,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:32:51,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:51,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:51,237 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:51,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-06 19:32:52,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:52,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:52,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:52,123 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:52,124 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:52,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845634076] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:52,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:52,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 19:32:52,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658117196] [2021-08-06 19:32:52,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:32:52,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:52,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:32:52,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:32:52,142 INFO L87 Difference]: Start difference. First operand 5197 states and 12792 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:52,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:52,245 INFO L93 Difference]: Finished difference Result 5406 states and 13153 transitions. [2021-08-06 19:32:52,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:32:52,246 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:52,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:52,251 INFO L225 Difference]: With dead ends: 5406 [2021-08-06 19:32:52,251 INFO L226 Difference]: Without dead ends: 5406 [2021-08-06 19:32:52,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:32:52,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5406 states. [2021-08-06 19:32:52,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5406 to 5222. [2021-08-06 19:32:52,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5222 states, 5221 states have (on average 2.4596820532465045) internal successors, (12842), 5221 states have internal predecessors, (12842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:52,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5222 states to 5222 states and 12842 transitions. [2021-08-06 19:32:52,361 INFO L78 Accepts]: Start accepts. Automaton has 5222 states and 12842 transitions. Word has length 20 [2021-08-06 19:32:52,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:52,361 INFO L470 AbstractCegarLoop]: Abstraction has 5222 states and 12842 transitions. [2021-08-06 19:32:52,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:52,361 INFO L276 IsEmpty]: Start isEmpty. Operand 5222 states and 12842 transitions. [2021-08-06 19:32:52,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:52,364 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:52,365 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:52,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:52,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:52,583 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:52,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:52,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1290298754, now seen corresponding path program 116 times [2021-08-06 19:32:52,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:52,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188127643] [2021-08-06 19:32:52,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:52,583 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:52,682 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:52,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:52,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188127643] [2021-08-06 19:32:52,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188127643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:52,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75371799] [2021-08-06 19:32:52,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:32:52,683 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:52,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:52,683 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:52,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-06 19:32:53,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:32:53,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:53,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:53,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:53,581 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:53,582 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:53,598 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:53,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75371799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:53,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:53,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 19:32:53,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648694366] [2021-08-06 19:32:53,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:32:53,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:53,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:32:53,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:32:53,599 INFO L87 Difference]: Start difference. First operand 5222 states and 12842 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:53,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:53,699 INFO L93 Difference]: Finished difference Result 6838 states and 16535 transitions. [2021-08-06 19:32:53,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:32:53,699 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:53,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:53,706 INFO L225 Difference]: With dead ends: 6838 [2021-08-06 19:32:53,706 INFO L226 Difference]: Without dead ends: 6838 [2021-08-06 19:32:53,706 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 98.0ms TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:32:53,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6838 states. [2021-08-06 19:32:53,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6838 to 6637. [2021-08-06 19:32:53,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6637 states, 6636 states have (on average 2.436407474382158) internal successors, (16168), 6636 states have internal predecessors, (16168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:53,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6637 states to 6637 states and 16168 transitions. [2021-08-06 19:32:53,784 INFO L78 Accepts]: Start accepts. Automaton has 6637 states and 16168 transitions. Word has length 20 [2021-08-06 19:32:53,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:53,784 INFO L470 AbstractCegarLoop]: Abstraction has 6637 states and 16168 transitions. [2021-08-06 19:32:53,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:53,784 INFO L276 IsEmpty]: Start isEmpty. Operand 6637 states and 16168 transitions. [2021-08-06 19:32:53,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:53,787 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:53,787 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:53,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:54,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:54,001 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:54,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:54,001 INFO L82 PathProgramCache]: Analyzing trace with hash 217213374, now seen corresponding path program 117 times [2021-08-06 19:32:54,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:54,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886378537] [2021-08-06 19:32:54,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:54,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:54,075 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:54,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:54,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886378537] [2021-08-06 19:32:54,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886378537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:54,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048096335] [2021-08-06 19:32:54,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:32:54,076 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:54,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:54,077 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:54,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-06 19:32:54,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:32:54,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:54,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:54,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:54,985 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:54,985 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:55,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048096335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:55,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:55,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 19:32:55,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212808787] [2021-08-06 19:32:55,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:32:55,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:55,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:32:55,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:32:55,005 INFO L87 Difference]: Start difference. First operand 6637 states and 16168 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:55,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:55,088 INFO L93 Difference]: Finished difference Result 6961 states and 16826 transitions. [2021-08-06 19:32:55,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:32:55,088 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:55,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:55,095 INFO L225 Difference]: With dead ends: 6961 [2021-08-06 19:32:55,095 INFO L226 Difference]: Without dead ends: 6961 [2021-08-06 19:32:55,096 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:32:55,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6961 states. [2021-08-06 19:32:55,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6961 to 6923. [2021-08-06 19:32:55,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6923 states, 6922 states have (on average 2.4228546662814217) internal successors, (16771), 6922 states have internal predecessors, (16771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:55,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6923 states to 6923 states and 16771 transitions. [2021-08-06 19:32:55,179 INFO L78 Accepts]: Start accepts. Automaton has 6923 states and 16771 transitions. Word has length 20 [2021-08-06 19:32:55,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:55,180 INFO L470 AbstractCegarLoop]: Abstraction has 6923 states and 16771 transitions. [2021-08-06 19:32:55,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:55,180 INFO L276 IsEmpty]: Start isEmpty. Operand 6923 states and 16771 transitions. [2021-08-06 19:32:55,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:55,183 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:55,183 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:55,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:55,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:55,397 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:55,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:55,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1311304962, now seen corresponding path program 118 times [2021-08-06 19:32:55,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:55,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366329182] [2021-08-06 19:32:55,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:55,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:55,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:55,473 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:55,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:55,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366329182] [2021-08-06 19:32:55,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366329182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:55,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139426188] [2021-08-06 19:32:55,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:32:55,473 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:55,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:55,474 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:55,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-06 19:32:56,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:32:56,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:56,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:56,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:56,142 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:56,142 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:56,155 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:56,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139426188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:56,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:56,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:32:56,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177939396] [2021-08-06 19:32:56,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:32:56,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:56,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:32:56,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:32:56,156 INFO L87 Difference]: Start difference. First operand 6923 states and 16771 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:56,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:56,287 INFO L93 Difference]: Finished difference Result 7013 states and 16929 transitions. [2021-08-06 19:32:56,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:32:56,288 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:56,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:56,295 INFO L225 Difference]: With dead ends: 7013 [2021-08-06 19:32:56,295 INFO L226 Difference]: Without dead ends: 7013 [2021-08-06 19:32:56,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 108.1ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:32:56,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7013 states. [2021-08-06 19:32:56,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7013 to 6933. [2021-08-06 19:32:56,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6933 states, 6932 states have (on average 2.4221004039238316) internal successors, (16790), 6932 states have internal predecessors, (16790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:56,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6933 states to 6933 states and 16790 transitions. [2021-08-06 19:32:56,384 INFO L78 Accepts]: Start accepts. Automaton has 6933 states and 16790 transitions. Word has length 20 [2021-08-06 19:32:56,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:56,384 INFO L470 AbstractCegarLoop]: Abstraction has 6933 states and 16790 transitions. [2021-08-06 19:32:56,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:56,384 INFO L276 IsEmpty]: Start isEmpty. Operand 6933 states and 16790 transitions. [2021-08-06 19:32:56,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:56,388 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:56,388 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:56,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-08-06 19:32:56,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:56,610 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:56,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:56,610 INFO L82 PathProgramCache]: Analyzing trace with hash 868405822, now seen corresponding path program 119 times [2021-08-06 19:32:56,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:56,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426208157] [2021-08-06 19:32:56,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:56,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:56,693 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:56,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:56,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426208157] [2021-08-06 19:32:56,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426208157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:56,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123325118] [2021-08-06 19:32:56,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:32:56,694 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:56,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:56,694 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:56,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-06 19:32:57,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:32:57,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:57,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:57,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:57,616 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:57,617 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:57,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123325118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:57,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:57,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:32:57,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018074879] [2021-08-06 19:32:57,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:32:57,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:57,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:32:57,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:32:57,632 INFO L87 Difference]: Start difference. First operand 6933 states and 16790 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:57,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:57,794 INFO L93 Difference]: Finished difference Result 7056 states and 17030 transitions. [2021-08-06 19:32:57,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:32:57,795 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:57,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:57,802 INFO L225 Difference]: With dead ends: 7056 [2021-08-06 19:32:57,802 INFO L226 Difference]: Without dead ends: 7056 [2021-08-06 19:32:57,802 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 149.5ms TimeCoverageRelationStatistics Valid=223, Invalid=479, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:32:57,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7056 states. [2021-08-06 19:32:57,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7056 to 7014. [2021-08-06 19:32:57,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7014 states, 7013 states have (on average 2.417367745615286) internal successors, (16953), 7013 states have internal predecessors, (16953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:57,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7014 states to 7014 states and 16953 transitions. [2021-08-06 19:32:57,883 INFO L78 Accepts]: Start accepts. Automaton has 7014 states and 16953 transitions. Word has length 20 [2021-08-06 19:32:57,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:57,883 INFO L470 AbstractCegarLoop]: Abstraction has 7014 states and 16953 transitions. [2021-08-06 19:32:57,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:57,883 INFO L276 IsEmpty]: Start isEmpty. Operand 7014 states and 16953 transitions. [2021-08-06 19:32:57,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:57,886 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:57,887 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:57,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:58,100 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,SelfDestructingSolverStorable122 [2021-08-06 19:32:58,101 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:58,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:58,101 INFO L82 PathProgramCache]: Analyzing trace with hash 23434370, now seen corresponding path program 120 times [2021-08-06 19:32:58,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:58,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893410208] [2021-08-06 19:32:58,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:58,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:58,173 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:58,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:58,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893410208] [2021-08-06 19:32:58,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893410208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:58,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619146037] [2021-08-06 19:32:58,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:32:58,174 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:58,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:58,174 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:58,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-06 19:32:59,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:32:59,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:59,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:32:59,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:59,080 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:59,081 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:32:59,095 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:59,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619146037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:59,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:59,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:32:59,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104006798] [2021-08-06 19:32:59,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:32:59,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:59,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:32:59,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:32:59,095 INFO L87 Difference]: Start difference. First operand 7014 states and 16953 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:59,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:59,334 INFO L93 Difference]: Finished difference Result 7106 states and 17137 transitions. [2021-08-06 19:32:59,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:32:59,335 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:32:59,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:59,345 INFO L225 Difference]: With dead ends: 7106 [2021-08-06 19:32:59,345 INFO L226 Difference]: Without dead ends: 7106 [2021-08-06 19:32:59,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 215.0ms TimeCoverageRelationStatistics Valid=343, Invalid=713, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 19:32:59,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7106 states. [2021-08-06 19:32:59,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7106 to 7050. [2021-08-06 19:32:59,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7050 states, 7049 states have (on average 2.415236203716839) internal successors, (17025), 7049 states have internal predecessors, (17025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:59,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7050 states to 7050 states and 17025 transitions. [2021-08-06 19:32:59,457 INFO L78 Accepts]: Start accepts. Automaton has 7050 states and 17025 transitions. Word has length 20 [2021-08-06 19:32:59,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:59,458 INFO L470 AbstractCegarLoop]: Abstraction has 7050 states and 17025 transitions. [2021-08-06 19:32:59,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:59,458 INFO L276 IsEmpty]: Start isEmpty. Operand 7050 states and 17025 transitions. [2021-08-06 19:32:59,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:32:59,461 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:59,461 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:59,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:59,678 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,SelfDestructingSolverStorable123 [2021-08-06 19:32:59,678 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:59,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:59,678 INFO L82 PathProgramCache]: Analyzing trace with hash -400876866, now seen corresponding path program 121 times [2021-08-06 19:32:59,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:59,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339041189] [2021-08-06 19:32:59,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:59,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:59,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:59,766 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:59,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:59,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339041189] [2021-08-06 19:32:59,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339041189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:59,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894814794] [2021-08-06 19:32:59,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:32:59,767 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:59,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:59,767 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:59,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-06 19:33:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:00,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:33:00,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:00,696 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:00,697 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:00,711 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:00,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894814794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:00,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:00,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:33:00,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267005200] [2021-08-06 19:33:00,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:33:00,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:00,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:33:00,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:33:00,711 INFO L87 Difference]: Start difference. First operand 7050 states and 17025 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:00,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:00,964 INFO L93 Difference]: Finished difference Result 7281 states and 17487 transitions. [2021-08-06 19:33:00,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 19:33:00,964 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:33:00,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:00,972 INFO L225 Difference]: With dead ends: 7281 [2021-08-06 19:33:00,972 INFO L226 Difference]: Without dead ends: 7281 [2021-08-06 19:33:00,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 244.0ms TimeCoverageRelationStatistics Valid=469, Invalid=937, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 19:33:00,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7281 states. [2021-08-06 19:33:01,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7281 to 7079. [2021-08-06 19:33:01,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7079 states, 7078 states have (on average 2.4135348968635206) internal successors, (17083), 7078 states have internal predecessors, (17083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:01,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7079 states to 7079 states and 17083 transitions. [2021-08-06 19:33:01,058 INFO L78 Accepts]: Start accepts. Automaton has 7079 states and 17083 transitions. Word has length 20 [2021-08-06 19:33:01,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:01,058 INFO L470 AbstractCegarLoop]: Abstraction has 7079 states and 17083 transitions. [2021-08-06 19:33:01,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:01,058 INFO L276 IsEmpty]: Start isEmpty. Operand 7079 states and 17083 transitions. [2021-08-06 19:33:01,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:33:01,062 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:01,062 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:01,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2021-08-06 19:33:01,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:01,269 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:01,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:01,269 INFO L82 PathProgramCache]: Analyzing trace with hash 223518582, now seen corresponding path program 122 times [2021-08-06 19:33:01,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:01,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115153299] [2021-08-06 19:33:01,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:01,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:01,379 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:01,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:01,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115153299] [2021-08-06 19:33:01,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115153299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:01,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160395314] [2021-08-06 19:33:01,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:33:01,379 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:01,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:01,380 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) [2021-08-06 19:33:01,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-06 19:33:02,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:33:02,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:02,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:33:02,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:02,278 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:33:02,279 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:33:02,293 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:02,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160395314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:02,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:02,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 19:33:02,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907286424] [2021-08-06 19:33:02,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:33:02,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:02,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:33:02,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:33:02,294 INFO L87 Difference]: Start difference. First operand 7079 states and 17083 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:02,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:02,491 INFO L93 Difference]: Finished difference Result 7146 states and 17148 transitions. [2021-08-06 19:33:02,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 19:33:02,492 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 20 [2021-08-06 19:33:02,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:02,500 INFO L225 Difference]: With dead ends: 7146 [2021-08-06 19:33:02,500 INFO L226 Difference]: Without dead ends: 7144 [2021-08-06 19:33:02,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 159.3ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:33:02,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7144 states. [2021-08-06 19:33:02,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7144 to 7042. [2021-08-06 19:33:02,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7042 states, 7041 states have (on average 2.412157364010794) internal successors, (16984), 7041 states have internal predecessors, (16984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:02,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7042 states to 7042 states and 16984 transitions. [2021-08-06 19:33:02,595 INFO L78 Accepts]: Start accepts. Automaton has 7042 states and 16984 transitions. Word has length 20 [2021-08-06 19:33:02,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:02,595 INFO L470 AbstractCegarLoop]: Abstraction has 7042 states and 16984 transitions. [2021-08-06 19:33:02,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:02,595 INFO L276 IsEmpty]: Start isEmpty. Operand 7042 states and 16984 transitions. [2021-08-06 19:33:02,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:33:02,599 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:02,599 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:02,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2021-08-06 19:33:02,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-06 19:33:02,818 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:02,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:02,818 INFO L82 PathProgramCache]: Analyzing trace with hash -696182126, now seen corresponding path program 123 times [2021-08-06 19:33:02,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:02,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420280770] [2021-08-06 19:33:02,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:02,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:02,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:02,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:02,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420280770] [2021-08-06 19:33:02,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420280770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:02,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182587668] [2021-08-06 19:33:02,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:33:02,894 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:02,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:02,895 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) [2021-08-06 19:33:02,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-06 19:33:03,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 19:33:03,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:03,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:33:03,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:03,551 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:03,551 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:03,563 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:03,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182587668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:03,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:03,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 19:33:03,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445531203] [2021-08-06 19:33:03,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:33:03,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:03,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:33:03,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:33:03,564 INFO L87 Difference]: Start difference. First operand 7042 states and 16984 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:03,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:03,678 INFO L93 Difference]: Finished difference Result 7139 states and 17135 transitions. [2021-08-06 19:33:03,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:33:03,678 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 20 [2021-08-06 19:33:03,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:03,686 INFO L225 Difference]: With dead ends: 7139 [2021-08-06 19:33:03,686 INFO L226 Difference]: Without dead ends: 7139 [2021-08-06 19:33:03,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:33:03,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7139 states. [2021-08-06 19:33:03,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7139 to 6984. [2021-08-06 19:33:03,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6984 states, 6983 states have (on average 2.4077044250322213) internal successors, (16813), 6983 states have internal predecessors, (16813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:03,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6984 states to 6984 states and 16813 transitions. [2021-08-06 19:33:03,768 INFO L78 Accepts]: Start accepts. Automaton has 6984 states and 16813 transitions. Word has length 20 [2021-08-06 19:33:03,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:03,768 INFO L470 AbstractCegarLoop]: Abstraction has 6984 states and 16813 transitions. [2021-08-06 19:33:03,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:03,768 INFO L276 IsEmpty]: Start isEmpty. Operand 6984 states and 16813 transitions. [2021-08-06 19:33:03,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:33:03,771 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:03,771 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:03,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-08-06 19:33:03,985 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,SelfDestructingSolverStorable126 [2021-08-06 19:33:03,985 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:03,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:03,986 INFO L82 PathProgramCache]: Analyzing trace with hash -223206474, now seen corresponding path program 124 times [2021-08-06 19:33:03,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:03,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306257923] [2021-08-06 19:33:03,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:03,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:03,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:04,072 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:04,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:04,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306257923] [2021-08-06 19:33:04,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306257923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:04,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134424341] [2021-08-06 19:33:04,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:33:04,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:04,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:04,073 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) [2021-08-06 19:33:04,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-06 19:33:04,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:33:04,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:04,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:33:04,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:05,022 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:05,023 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:05,035 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:05,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134424341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:05,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:05,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:33:05,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456273817] [2021-08-06 19:33:05,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:33:05,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:05,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:33:05,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:33:05,036 INFO L87 Difference]: Start difference. First operand 6984 states and 16813 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:05,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:05,246 INFO L93 Difference]: Finished difference Result 8667 states and 20385 transitions. [2021-08-06 19:33:05,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 19:33:05,247 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 20 [2021-08-06 19:33:05,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:05,257 INFO L225 Difference]: With dead ends: 8667 [2021-08-06 19:33:05,258 INFO L226 Difference]: Without dead ends: 8667 [2021-08-06 19:33:05,258 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 195.4ms TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 19:33:05,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8667 states. [2021-08-06 19:33:05,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8667 to 7432. [2021-08-06 19:33:05,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7432 states, 7431 states have (on average 2.385277889920603) internal successors, (17725), 7431 states have internal predecessors, (17725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:05,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7432 states to 7432 states and 17725 transitions. [2021-08-06 19:33:05,362 INFO L78 Accepts]: Start accepts. Automaton has 7432 states and 17725 transitions. Word has length 20 [2021-08-06 19:33:05,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:05,363 INFO L470 AbstractCegarLoop]: Abstraction has 7432 states and 17725 transitions. [2021-08-06 19:33:05,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:05,363 INFO L276 IsEmpty]: Start isEmpty. Operand 7432 states and 17725 transitions. [2021-08-06 19:33:05,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:33:05,367 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:05,367 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:05,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:05,580 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,SelfDestructingSolverStorable127 [2021-08-06 19:33:05,580 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:05,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:05,580 INFO L82 PathProgramCache]: Analyzing trace with hash -647517710, now seen corresponding path program 125 times [2021-08-06 19:33:05,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:05,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713630615] [2021-08-06 19:33:05,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:05,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:05,671 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:05,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:05,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713630615] [2021-08-06 19:33:05,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713630615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:05,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115030177] [2021-08-06 19:33:05,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:33:05,672 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:05,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:05,673 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) [2021-08-06 19:33:05,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-06 19:33:06,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:33:06,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:06,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:33:06,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:06,623 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:06,624 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:06,638 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:06,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115030177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:06,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:06,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:33:06,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301208599] [2021-08-06 19:33:06,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:33:06,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:06,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:33:06,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:33:06,638 INFO L87 Difference]: Start difference. First operand 7432 states and 17725 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:06,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:06,861 INFO L93 Difference]: Finished difference Result 7744 states and 18360 transitions. [2021-08-06 19:33:06,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 19:33:06,861 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 20 [2021-08-06 19:33:06,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:06,871 INFO L225 Difference]: With dead ends: 7744 [2021-08-06 19:33:06,872 INFO L226 Difference]: Without dead ends: 7744 [2021-08-06 19:33:06,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 193.8ms TimeCoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 19:33:06,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7744 states. [2021-08-06 19:33:06,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7744 to 7389. [2021-08-06 19:33:06,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7389 states, 7388 states have (on average 2.389550622631294) internal successors, (17654), 7388 states have internal predecessors, (17654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:06,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7389 states to 7389 states and 17654 transitions. [2021-08-06 19:33:06,976 INFO L78 Accepts]: Start accepts. Automaton has 7389 states and 17654 transitions. Word has length 20 [2021-08-06 19:33:06,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:06,976 INFO L470 AbstractCegarLoop]: Abstraction has 7389 states and 17654 transitions. [2021-08-06 19:33:06,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:06,976 INFO L276 IsEmpty]: Start isEmpty. Operand 7389 states and 17654 transitions. [2021-08-06 19:33:06,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:33:06,980 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:06,980 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:06,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:07,198 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,SelfDestructingSolverStorable128 [2021-08-06 19:33:07,199 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:07,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:07,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1492489162, now seen corresponding path program 126 times [2021-08-06 19:33:07,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:07,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58237593] [2021-08-06 19:33:07,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:07,199 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:07,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:07,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:07,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58237593] [2021-08-06 19:33:07,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58237593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:07,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229200796] [2021-08-06 19:33:07,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:33:07,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:07,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:07,288 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) [2021-08-06 19:33:07,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-06 19:33:08,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:33:08,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:08,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:33:08,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:08,245 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:08,245 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:08,259 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:08,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229200796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:08,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:08,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:33:08,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954255619] [2021-08-06 19:33:08,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:33:08,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:08,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:33:08,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:33:08,260 INFO L87 Difference]: Start difference. First operand 7389 states and 17654 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:08,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:08,523 INFO L93 Difference]: Finished difference Result 7801 states and 18484 transitions. [2021-08-06 19:33:08,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 19:33:08,524 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 20 [2021-08-06 19:33:08,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:08,534 INFO L225 Difference]: With dead ends: 7801 [2021-08-06 19:33:08,534 INFO L226 Difference]: Without dead ends: 7801 [2021-08-06 19:33:08,534 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 243.4ms TimeCoverageRelationStatistics Valid=469, Invalid=937, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 19:33:08,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7801 states. [2021-08-06 19:33:08,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7801 to 7414. [2021-08-06 19:33:08,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7414 states, 7413 states have (on average 2.389720760825577) internal successors, (17715), 7413 states have internal predecessors, (17715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:08,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7414 states to 7414 states and 17715 transitions. [2021-08-06 19:33:08,634 INFO L78 Accepts]: Start accepts. Automaton has 7414 states and 17715 transitions. Word has length 20 [2021-08-06 19:33:08,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:08,634 INFO L470 AbstractCegarLoop]: Abstraction has 7414 states and 17715 transitions. [2021-08-06 19:33:08,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:08,634 INFO L276 IsEmpty]: Start isEmpty. Operand 7414 states and 17715 transitions. [2021-08-06 19:33:08,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:33:08,638 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:08,638 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:08,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-08-06 19:33:08,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:08,857 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:08,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:08,857 INFO L82 PathProgramCache]: Analyzing trace with hash -916264138, now seen corresponding path program 127 times [2021-08-06 19:33:08,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:08,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728483406] [2021-08-06 19:33:08,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:08,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:08,933 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:08,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:08,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728483406] [2021-08-06 19:33:08,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728483406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:08,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710823102] [2021-08-06 19:33:08,933 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:33:08,933 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:08,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:08,934 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) [2021-08-06 19:33:08,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-06 19:33:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:09,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:33:09,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:09,762 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:09,762 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:09,776 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:09,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710823102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:09,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:09,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:33:09,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526196002] [2021-08-06 19:33:09,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:33:09,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:09,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:33:09,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:33:09,778 INFO L87 Difference]: Start difference. First operand 7414 states and 17715 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:09,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:09,935 INFO L93 Difference]: Finished difference Result 7518 states and 17911 transitions. [2021-08-06 19:33:09,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:33:09,935 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 20 [2021-08-06 19:33:09,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:09,944 INFO L225 Difference]: With dead ends: 7518 [2021-08-06 19:33:09,944 INFO L226 Difference]: Without dead ends: 7518 [2021-08-06 19:33:09,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 148.9ms TimeCoverageRelationStatistics Valid=294, Invalid=576, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:33:09,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7518 states. [2021-08-06 19:33:10,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7518 to 7394. [2021-08-06 19:33:10,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7394 states, 7393 states have (on average 2.3909103205735156) internal successors, (17676), 7393 states have internal predecessors, (17676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:10,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7394 states to 7394 states and 17676 transitions. [2021-08-06 19:33:10,060 INFO L78 Accepts]: Start accepts. Automaton has 7394 states and 17676 transitions. Word has length 20 [2021-08-06 19:33:10,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:10,061 INFO L470 AbstractCegarLoop]: Abstraction has 7394 states and 17676 transitions. [2021-08-06 19:33:10,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:10,061 INFO L276 IsEmpty]: Start isEmpty. Operand 7394 states and 17676 transitions. [2021-08-06 19:33:10,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:33:10,065 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:10,065 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:10,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:10,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:10,281 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:10,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:10,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1761235590, now seen corresponding path program 128 times [2021-08-06 19:33:10,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:10,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054291574] [2021-08-06 19:33:10,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:10,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:10,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:10,352 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:10,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:10,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054291574] [2021-08-06 19:33:10,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054291574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:10,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370274059] [2021-08-06 19:33:10,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:33:10,353 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:10,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:10,354 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) [2021-08-06 19:33:10,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-06 19:33:11,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:33:11,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:11,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:33:11,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:11,295 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:11,296 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:11,309 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:11,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370274059] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:11,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:11,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:33:11,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249615145] [2021-08-06 19:33:11,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:33:11,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:11,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:33:11,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:33:11,310 INFO L87 Difference]: Start difference. First operand 7394 states and 17676 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:11,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:11,468 INFO L93 Difference]: Finished difference Result 7476 states and 17840 transitions. [2021-08-06 19:33:11,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:33:11,468 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 20 [2021-08-06 19:33:11,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:11,476 INFO L225 Difference]: With dead ends: 7476 [2021-08-06 19:33:11,476 INFO L226 Difference]: Without dead ends: 7476 [2021-08-06 19:33:11,476 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 148.6ms TimeCoverageRelationStatistics Valid=278, Invalid=592, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:33:11,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7476 states. [2021-08-06 19:33:11,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7476 to 7390. [2021-08-06 19:33:11,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7390 states, 7389 states have (on average 2.39112193801597) internal successors, (17668), 7389 states have internal predecessors, (17668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:11,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7390 states to 7390 states and 17668 transitions. [2021-08-06 19:33:11,572 INFO L78 Accepts]: Start accepts. Automaton has 7390 states and 17668 transitions. Word has length 20 [2021-08-06 19:33:11,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:11,572 INFO L470 AbstractCegarLoop]: Abstraction has 7390 states and 17668 transitions. [2021-08-06 19:33:11,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:11,572 INFO L276 IsEmpty]: Start isEmpty. Operand 7390 states and 17668 transitions. [2021-08-06 19:33:11,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:33:11,575 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:11,576 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:11,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:11,793 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,SelfDestructingSolverStorable131 [2021-08-06 19:33:11,794 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:11,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:11,794 INFO L82 PathProgramCache]: Analyzing trace with hash 2109420470, now seen corresponding path program 129 times [2021-08-06 19:33:11,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:11,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994752678] [2021-08-06 19:33:11,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:11,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:11,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:11,890 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:11,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:11,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994752678] [2021-08-06 19:33:11,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994752678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:11,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229013801] [2021-08-06 19:33:11,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:33:11,891 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:11,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:11,891 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) [2021-08-06 19:33:11,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-06 19:33:12,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:33:12,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:12,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:33:12,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:12,860 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:12,861 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:12,879 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:12,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229013801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:12,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:12,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:33:12,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592002621] [2021-08-06 19:33:12,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:33:12,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:12,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:33:12,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:33:12,880 INFO L87 Difference]: Start difference. First operand 7390 states and 17668 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:13,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:13,135 INFO L93 Difference]: Finished difference Result 7575 states and 18038 transitions. [2021-08-06 19:33:13,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 19:33:13,136 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 20 [2021-08-06 19:33:13,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:13,145 INFO L225 Difference]: With dead ends: 7575 [2021-08-06 19:33:13,145 INFO L226 Difference]: Without dead ends: 7575 [2021-08-06 19:33:13,145 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 257.2ms TimeCoverageRelationStatistics Valid=468, Invalid=938, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 19:33:13,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7575 states. [2021-08-06 19:33:13,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7575 to 7391. [2021-08-06 19:33:13,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7391 states, 7390 states have (on average 2.39106901217862) internal successors, (17670), 7390 states have internal predecessors, (17670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:13,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7391 states to 7391 states and 17670 transitions. [2021-08-06 19:33:13,244 INFO L78 Accepts]: Start accepts. Automaton has 7391 states and 17670 transitions. Word has length 20 [2021-08-06 19:33:13,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:13,244 INFO L470 AbstractCegarLoop]: Abstraction has 7391 states and 17670 transitions. [2021-08-06 19:33:13,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:13,244 INFO L276 IsEmpty]: Start isEmpty. Operand 7391 states and 17670 transitions. [2021-08-06 19:33:13,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:33:13,248 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:13,248 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:13,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:13,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:13,467 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:13,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:13,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1717250480, now seen corresponding path program 130 times [2021-08-06 19:33:13,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:13,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078726794] [2021-08-06 19:33:13,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:13,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:13,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:13,529 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:13,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:13,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078726794] [2021-08-06 19:33:13,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078726794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:13,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522655334] [2021-08-06 19:33:13,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:33:13,529 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:13,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:13,530 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) [2021-08-06 19:33:13,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-06 19:33:14,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:33:14,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:14,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:33:14,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:14,535 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:33:14,535 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:33:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:14,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522655334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:14,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:14,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:33:14,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035614513] [2021-08-06 19:33:14,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:33:14,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:14,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:33:14,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:33:14,549 INFO L87 Difference]: Start difference. First operand 7391 states and 17670 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:14,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:14,637 INFO L93 Difference]: Finished difference Result 8075 states and 19178 transitions. [2021-08-06 19:33:14,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:33:14,637 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 20 [2021-08-06 19:33:14,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:14,646 INFO L225 Difference]: With dead ends: 8075 [2021-08-06 19:33:14,646 INFO L226 Difference]: Without dead ends: 8074 [2021-08-06 19:33:14,646 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:33:14,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2021-08-06 19:33:14,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8032. [2021-08-06 19:33:14,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8032 states, 8031 states have (on average 2.38351388370066) internal successors, (19142), 8031 states have internal predecessors, (19142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:14,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8032 states to 8032 states and 19142 transitions. [2021-08-06 19:33:14,744 INFO L78 Accepts]: Start accepts. Automaton has 8032 states and 19142 transitions. Word has length 20 [2021-08-06 19:33:14,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:14,744 INFO L470 AbstractCegarLoop]: Abstraction has 8032 states and 19142 transitions. [2021-08-06 19:33:14,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:14,744 INFO L276 IsEmpty]: Start isEmpty. Operand 8032 states and 19142 transitions. [2021-08-06 19:33:14,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:33:14,749 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:14,749 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:14,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:14,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:14,967 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:14,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:14,967 INFO L82 PathProgramCache]: Analyzing trace with hash -915634252, now seen corresponding path program 131 times [2021-08-06 19:33:14,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:14,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810805183] [2021-08-06 19:33:14,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:14,967 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:14,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:15,051 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:15,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:15,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810805183] [2021-08-06 19:33:15,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810805183] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:15,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589189874] [2021-08-06 19:33:15,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:33:15,052 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:15,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:15,066 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) [2021-08-06 19:33:15,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-06 19:33:16,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 19:33:16,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:16,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:33:16,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:16,074 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:16,074 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:16,085 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:16,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589189874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:16,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:16,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:33:16,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141192226] [2021-08-06 19:33:16,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:33:16,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:16,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:33:16,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:33:16,086 INFO L87 Difference]: Start difference. First operand 8032 states and 19142 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:16,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:16,151 INFO L93 Difference]: Finished difference Result 8167 states and 19351 transitions. [2021-08-06 19:33:16,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:33:16,151 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 20 [2021-08-06 19:33:16,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:16,161 INFO L225 Difference]: With dead ends: 8167 [2021-08-06 19:33:16,161 INFO L226 Difference]: Without dead ends: 8167 [2021-08-06 19:33:16,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:33:16,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8167 states. [2021-08-06 19:33:16,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8167 to 8042. [2021-08-06 19:33:16,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8042 states, 8041 states have (on average 2.384280562119139) internal successors, (19172), 8041 states have internal predecessors, (19172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:16,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8042 states to 8042 states and 19172 transitions. [2021-08-06 19:33:16,260 INFO L78 Accepts]: Start accepts. Automaton has 8042 states and 19172 transitions. Word has length 20 [2021-08-06 19:33:16,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:16,261 INFO L470 AbstractCegarLoop]: Abstraction has 8042 states and 19172 transitions. [2021-08-06 19:33:16,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:16,261 INFO L276 IsEmpty]: Start isEmpty. Operand 8042 states and 19172 transitions. [2021-08-06 19:33:16,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:33:16,265 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:16,265 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:16,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:16,483 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,SelfDestructingSolverStorable134 [2021-08-06 19:33:16,483 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:16,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:16,483 INFO L82 PathProgramCache]: Analyzing trace with hash 859373110, now seen corresponding path program 132 times [2021-08-06 19:33:16,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:16,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088911265] [2021-08-06 19:33:16,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:16,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:16,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:16,541 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:16,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:16,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088911265] [2021-08-06 19:33:16,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088911265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:16,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803500671] [2021-08-06 19:33:16,542 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:33:16,542 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:16,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:16,543 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:16,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-06 19:33:17,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 19:33:17,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:17,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:33:17,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:17,533 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:17,534 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:17,547 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:33:17,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803500671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:17,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:17,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:33:17,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000182882] [2021-08-06 19:33:17,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:33:17,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:17,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:33:17,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:33:17,547 INFO L87 Difference]: Start difference. First operand 8042 states and 19172 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:17,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:17,624 INFO L93 Difference]: Finished difference Result 8160 states and 19359 transitions. [2021-08-06 19:33:17,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:33:17,624 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 20 [2021-08-06 19:33:17,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:17,633 INFO L225 Difference]: With dead ends: 8160 [2021-08-06 19:33:17,633 INFO L226 Difference]: Without dead ends: 8160 [2021-08-06 19:33:17,633 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:33:17,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8160 states. [2021-08-06 19:33:17,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8160 to 8044. [2021-08-06 19:33:17,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8044 states, 8043 states have (on average 2.384185005594927) internal successors, (19176), 8043 states have internal predecessors, (19176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:17,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8044 states to 8044 states and 19176 transitions. [2021-08-06 19:33:17,778 INFO L78 Accepts]: Start accepts. Automaton has 8044 states and 19176 transitions. Word has length 20 [2021-08-06 19:33:17,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:17,778 INFO L470 AbstractCegarLoop]: Abstraction has 8044 states and 19176 transitions. [2021-08-06 19:33:17,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:17,778 INFO L276 IsEmpty]: Start isEmpty. Operand 8044 states and 19176 transitions. [2021-08-06 19:33:17,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:33:17,782 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:17,782 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:17,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:18,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-06 19:33:18,000 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:18,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:18,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1724980878, now seen corresponding path program 133 times [2021-08-06 19:33:18,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:18,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994649091] [2021-08-06 19:33:18,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:18,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:18,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:18,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:18,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994649091] [2021-08-06 19:33:18,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994649091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:18,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852960265] [2021-08-06 19:33:18,065 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:33:18,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:18,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:18,066 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:18,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-06 19:33:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:18,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:33:18,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:19,042 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:19,042 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:19,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852960265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:19,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:19,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 19:33:19,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779912939] [2021-08-06 19:33:19,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:33:19,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:19,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:33:19,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:33:19,056 INFO L87 Difference]: Start difference. First operand 8044 states and 19176 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:19,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:19,165 INFO L93 Difference]: Finished difference Result 8228 states and 19495 transitions. [2021-08-06 19:33:19,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:33:19,165 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 20 [2021-08-06 19:33:19,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:19,174 INFO L225 Difference]: With dead ends: 8228 [2021-08-06 19:33:19,174 INFO L226 Difference]: Without dead ends: 8228 [2021-08-06 19:33:19,174 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:33:19,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8228 states. [2021-08-06 19:33:19,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8228 to 8062. [2021-08-06 19:33:19,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8062 states, 8061 states have (on average 2.3833271306289543) internal successors, (19212), 8061 states have internal predecessors, (19212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:19,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8062 states to 8062 states and 19212 transitions. [2021-08-06 19:33:19,288 INFO L78 Accepts]: Start accepts. Automaton has 8062 states and 19212 transitions. Word has length 20 [2021-08-06 19:33:19,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:19,288 INFO L470 AbstractCegarLoop]: Abstraction has 8062 states and 19212 transitions. [2021-08-06 19:33:19,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:19,289 INFO L276 IsEmpty]: Start isEmpty. Operand 8062 states and 19212 transitions. [2021-08-06 19:33:19,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:33:19,293 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:19,293 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:19,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:19,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-06 19:33:19,509 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:19,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:19,509 INFO L82 PathProgramCache]: Analyzing trace with hash -235575882, now seen corresponding path program 134 times [2021-08-06 19:33:19,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:19,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450145467] [2021-08-06 19:33:19,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:19,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:19,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:19,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450145467] [2021-08-06 19:33:19,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450145467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:19,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741386104] [2021-08-06 19:33:19,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:33:19,578 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:19,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:19,579 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:19,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-06 19:33:20,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:33:20,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:20,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:33:20,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:20,605 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:20,605 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:20,619 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:20,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741386104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:20,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:20,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 19:33:20,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325273610] [2021-08-06 19:33:20,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:33:20,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:20,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:33:20,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:33:20,620 INFO L87 Difference]: Start difference. First operand 8062 states and 19212 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:20,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:20,748 INFO L93 Difference]: Finished difference Result 9577 states and 22609 transitions. [2021-08-06 19:33:20,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:33:20,748 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 20 [2021-08-06 19:33:20,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:20,759 INFO L225 Difference]: With dead ends: 9577 [2021-08-06 19:33:20,759 INFO L226 Difference]: Without dead ends: 9577 [2021-08-06 19:33:20,760 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 109.5ms TimeCoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:33:20,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9577 states. [2021-08-06 19:33:20,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9577 to 8975. [2021-08-06 19:33:20,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8975 states, 8974 states have (on average 2.3743035435703144) internal successors, (21307), 8974 states have internal predecessors, (21307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:20,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8975 states to 8975 states and 21307 transitions. [2021-08-06 19:33:20,874 INFO L78 Accepts]: Start accepts. Automaton has 8975 states and 21307 transitions. Word has length 20 [2021-08-06 19:33:20,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:20,874 INFO L470 AbstractCegarLoop]: Abstraction has 8975 states and 21307 transitions. [2021-08-06 19:33:20,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:20,874 INFO L276 IsEmpty]: Start isEmpty. Operand 8975 states and 21307 transitions. [2021-08-06 19:33:20,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:33:20,879 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:20,879 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:20,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:21,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:21,097 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:21,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:21,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1308661262, now seen corresponding path program 135 times [2021-08-06 19:33:21,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:21,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947497303] [2021-08-06 19:33:21,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:21,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:21,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:21,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947497303] [2021-08-06 19:33:21,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947497303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:21,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223966571] [2021-08-06 19:33:21,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:33:21,173 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:21,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:21,174 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:21,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-06 19:33:22,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:33:22,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:22,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:33:22,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:22,241 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:22,241 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:22,255 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:22,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223966571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:22,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:22,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 19:33:22,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526365921] [2021-08-06 19:33:22,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:33:22,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:22,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:33:22,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:33:22,256 INFO L87 Difference]: Start difference. First operand 8975 states and 21307 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:22,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:22,369 INFO L93 Difference]: Finished difference Result 9560 states and 22509 transitions. [2021-08-06 19:33:22,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:33:22,370 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 20 [2021-08-06 19:33:22,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:22,380 INFO L225 Difference]: With dead ends: 9560 [2021-08-06 19:33:22,381 INFO L226 Difference]: Without dead ends: 9560 [2021-08-06 19:33:22,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:33:22,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9560 states. [2021-08-06 19:33:22,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9560 to 9458. [2021-08-06 19:33:22,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9458 states, 9457 states have (on average 2.360790948503754) internal successors, (22326), 9457 states have internal predecessors, (22326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:22,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9458 states to 9458 states and 22326 transitions. [2021-08-06 19:33:22,499 INFO L78 Accepts]: Start accepts. Automaton has 9458 states and 22326 transitions. Word has length 20 [2021-08-06 19:33:22,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:22,499 INFO L470 AbstractCegarLoop]: Abstraction has 9458 states and 22326 transitions. [2021-08-06 19:33:22,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:22,499 INFO L276 IsEmpty]: Start isEmpty. Operand 9458 states and 22326 transitions. [2021-08-06 19:33:22,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:33:22,503 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:22,503 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:22,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:22,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-08-06 19:33:22,718 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:22,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:22,718 INFO L82 PathProgramCache]: Analyzing trace with hash -214569674, now seen corresponding path program 136 times [2021-08-06 19:33:22,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:22,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847103753] [2021-08-06 19:33:22,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:22,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:22,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:33:22,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:22,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847103753] [2021-08-06 19:33:22,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847103753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:22,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138280058] [2021-08-06 19:33:22,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:33:22,798 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:22,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:22,799 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:22,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-06 19:33:23,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:33:23,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:23,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:33:23,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:23,854 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:23,854 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:33:23,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138280058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:23,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:23,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 19:33:23,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243273029] [2021-08-06 19:33:23,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:33:23,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:23,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:33:23,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:33:23,871 INFO L87 Difference]: Start difference. First operand 9458 states and 22326 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:23,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:23,950 INFO L93 Difference]: Finished difference Result 9566 states and 22537 transitions. [2021-08-06 19:33:23,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:33:23,950 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 20 [2021-08-06 19:33:23,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:23,962 INFO L225 Difference]: With dead ends: 9566 [2021-08-06 19:33:23,963 INFO L226 Difference]: Without dead ends: 9566 [2021-08-06 19:33:23,963 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:33:23,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9566 states. [2021-08-06 19:33:24,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9566 to 9551. [2021-08-06 19:33:24,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9551 states, 9550 states have (on average 2.3574869109947643) internal successors, (22514), 9550 states have internal predecessors, (22514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:24,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9551 states to 9551 states and 22514 transitions. [2021-08-06 19:33:24,117 INFO L78 Accepts]: Start accepts. Automaton has 9551 states and 22514 transitions. Word has length 20 [2021-08-06 19:33:24,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:24,117 INFO L470 AbstractCegarLoop]: Abstraction has 9551 states and 22514 transitions. [2021-08-06 19:33:24,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:24,118 INFO L276 IsEmpty]: Start isEmpty. Operand 9551 states and 22514 transitions. [2021-08-06 19:33:24,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:33:24,122 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:24,122 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:24,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:24,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-08-06 19:33:24,324 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:24,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:24,324 INFO L82 PathProgramCache]: Analyzing trace with hash -657468814, now seen corresponding path program 137 times [2021-08-06 19:33:24,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:24,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311715125] [2021-08-06 19:33:24,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:24,324 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:24,397 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:24,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:24,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311715125] [2021-08-06 19:33:24,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311715125] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:24,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429319708] [2021-08-06 19:33:24,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:33:24,398 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:24,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:24,399 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:24,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-06 19:33:25,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:33:25,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:25,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:33:25,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:25,427 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:25,428 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:25,441 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:25,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429319708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:25,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:25,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:33:25,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437618464] [2021-08-06 19:33:25,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:33:25,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:25,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:33:25,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:33:25,441 INFO L87 Difference]: Start difference. First operand 9551 states and 22514 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:25,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:25,561 INFO L93 Difference]: Finished difference Result 9579 states and 22563 transitions. [2021-08-06 19:33:25,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:33:25,561 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 20 [2021-08-06 19:33:25,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:25,572 INFO L225 Difference]: With dead ends: 9579 [2021-08-06 19:33:25,572 INFO L226 Difference]: Without dead ends: 9579 [2021-08-06 19:33:25,572 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 114.3ms TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:33:25,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9579 states. [2021-08-06 19:33:25,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9579 to 9542. [2021-08-06 19:33:25,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9542 states, 9541 states have (on average 2.3578241274499527) internal successors, (22496), 9541 states have internal predecessors, (22496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:25,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9542 states to 9542 states and 22496 transitions. [2021-08-06 19:33:25,690 INFO L78 Accepts]: Start accepts. Automaton has 9542 states and 22496 transitions. Word has length 20 [2021-08-06 19:33:25,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:25,690 INFO L470 AbstractCegarLoop]: Abstraction has 9542 states and 22496 transitions. [2021-08-06 19:33:25,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:25,690 INFO L276 IsEmpty]: Start isEmpty. Operand 9542 states and 22496 transitions. [2021-08-06 19:33:25,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:33:25,738 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:25,738 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:25,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2021-08-06 19:33:25,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:25,953 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:25,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:25,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1502440266, now seen corresponding path program 138 times [2021-08-06 19:33:25,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:25,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412734888] [2021-08-06 19:33:25,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:25,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:25,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:26,033 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:26,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:26,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412734888] [2021-08-06 19:33:26,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412734888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:26,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350621577] [2021-08-06 19:33:26,034 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:33:26,034 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:26,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:26,034 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:26,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-06 19:33:27,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:33:27,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:27,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:33:27,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:27,070 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:27,071 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:27,085 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:27,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350621577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:27,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:27,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:33:27,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137461509] [2021-08-06 19:33:27,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:33:27,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:27,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:33:27,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:33:27,086 INFO L87 Difference]: Start difference. First operand 9542 states and 22496 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:27,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:27,243 INFO L93 Difference]: Finished difference Result 9600 states and 22612 transitions. [2021-08-06 19:33:27,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:33:27,243 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 20 [2021-08-06 19:33:27,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:27,254 INFO L225 Difference]: With dead ends: 9600 [2021-08-06 19:33:27,254 INFO L226 Difference]: Without dead ends: 9600 [2021-08-06 19:33:27,254 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 148.3ms TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:33:27,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9600 states. [2021-08-06 19:33:27,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9600 to 9557. [2021-08-06 19:33:27,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9557 states, 9556 states have (on average 2.357262452909167) internal successors, (22526), 9556 states have internal predecessors, (22526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:27,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9557 states to 9557 states and 22526 transitions. [2021-08-06 19:33:27,374 INFO L78 Accepts]: Start accepts. Automaton has 9557 states and 22526 transitions. Word has length 20 [2021-08-06 19:33:27,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:27,374 INFO L470 AbstractCegarLoop]: Abstraction has 9557 states and 22526 transitions. [2021-08-06 19:33:27,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:27,374 INFO L276 IsEmpty]: Start isEmpty. Operand 9557 states and 22526 transitions. [2021-08-06 19:33:27,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:33:27,379 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:27,379 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:27,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:27,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:27,588 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:27,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:27,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1926751502, now seen corresponding path program 139 times [2021-08-06 19:33:27,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:27,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453549485] [2021-08-06 19:33:27,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:27,588 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:27,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:27,682 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:27,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:27,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453549485] [2021-08-06 19:33:27,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453549485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:27,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091452090] [2021-08-06 19:33:27,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:33:27,682 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:27,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:27,683 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:27,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-06 19:33:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:28,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:33:28,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:28,592 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:28,593 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:28,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091452090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:28,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:28,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:33:28,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651899650] [2021-08-06 19:33:28,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:33:28,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:28,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:33:28,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:33:28,609 INFO L87 Difference]: Start difference. First operand 9557 states and 22526 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:28,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:28,807 INFO L93 Difference]: Finished difference Result 9696 states and 22804 transitions. [2021-08-06 19:33:28,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 19:33:28,808 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 20 [2021-08-06 19:33:28,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:28,818 INFO L225 Difference]: With dead ends: 9696 [2021-08-06 19:33:28,818 INFO L226 Difference]: Without dead ends: 9696 [2021-08-06 19:33:28,819 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 193.6ms TimeCoverageRelationStatistics Valid=324, Invalid=668, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:33:28,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9696 states. [2021-08-06 19:33:28,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9696 to 9569. [2021-08-06 19:33:28,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9569 states, 9568 states have (on average 2.356814381270903) internal successors, (22550), 9568 states have internal predecessors, (22550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:28,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9569 states to 9569 states and 22550 transitions. [2021-08-06 19:33:28,933 INFO L78 Accepts]: Start accepts. Automaton has 9569 states and 22550 transitions. Word has length 20 [2021-08-06 19:33:28,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:28,933 INFO L470 AbstractCegarLoop]: Abstraction has 9569 states and 22550 transitions. [2021-08-06 19:33:28,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:28,933 INFO L276 IsEmpty]: Start isEmpty. Operand 9569 states and 22550 transitions. [2021-08-06 19:33:28,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:33:28,937 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:28,937 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:28,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2021-08-06 19:33:29,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:29,153 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:29,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:29,153 INFO L82 PathProgramCache]: Analyzing trace with hash 2099469366, now seen corresponding path program 140 times [2021-08-06 19:33:29,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:29,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506592541] [2021-08-06 19:33:29,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:29,153 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:29,249 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:29,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:29,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506592541] [2021-08-06 19:33:29,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506592541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:29,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721171614] [2021-08-06 19:33:29,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:33:29,250 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:29,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:29,250 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:29,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-06 19:33:30,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:33:30,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:30,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:33:30,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:30,285 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:30,286 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:33:30,300 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:30,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721171614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:30,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:30,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:33:30,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849317838] [2021-08-06 19:33:30,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:33:30,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:30,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:33:30,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:33:30,301 INFO L87 Difference]: Start difference. First operand 9569 states and 22550 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:30,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:30,577 INFO L93 Difference]: Finished difference Result 9894 states and 23200 transitions. [2021-08-06 19:33:30,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:33:30,577 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 20 [2021-08-06 19:33:30,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:30,588 INFO L225 Difference]: With dead ends: 9894 [2021-08-06 19:33:30,588 INFO L226 Difference]: Without dead ends: 9894 [2021-08-06 19:33:30,588 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 268.4ms TimeCoverageRelationStatistics Valid=404, Invalid=786, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 19:33:30,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9894 states. [2021-08-06 19:33:30,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9894 to 9585. [2021-08-06 19:33:30,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9585 states, 9584 states have (on average 2.3562186978297164) internal successors, (22582), 9584 states have internal predecessors, (22582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:30,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9585 states to 9585 states and 22582 transitions. [2021-08-06 19:33:30,707 INFO L78 Accepts]: Start accepts. Automaton has 9585 states and 22582 transitions. Word has length 20 [2021-08-06 19:33:30,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:30,707 INFO L470 AbstractCegarLoop]: Abstraction has 9585 states and 22582 transitions. [2021-08-06 19:33:30,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:30,707 INFO L276 IsEmpty]: Start isEmpty. Operand 9585 states and 22582 transitions. [2021-08-06 19:33:30,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:33:30,711 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:30,711 INFO L512 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:30,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:30,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:30,929 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:30,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:30,929 INFO L82 PathProgramCache]: Analyzing trace with hash -50855515, now seen corresponding path program 141 times [2021-08-06 19:33:30,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:30,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818235411] [2021-08-06 19:33:30,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:30,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:31,076 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:33:31,077 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:33:31,091 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:33:31,092 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:33:31,095 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 19:33:31,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:31,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818235411] [2021-08-06 19:33:31,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818235411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:31,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084858412] [2021-08-06 19:33:31,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:33:31,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:31,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:31,096 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:31,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-06 19:33:31,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:33:31,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:31,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:33:31,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:31,967 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 19:33:31,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084858412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:31,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:31,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:33:31,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966484698] [2021-08-06 19:33:31,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:33:31,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:31,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:33:31,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:33:31,968 INFO L87 Difference]: Start difference. First operand 9585 states and 22582 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:32,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:32,105 INFO L93 Difference]: Finished difference Result 12176 states and 27732 transitions. [2021-08-06 19:33:32,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:33:32,106 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 21 [2021-08-06 19:33:32,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:32,120 INFO L225 Difference]: With dead ends: 12176 [2021-08-06 19:33:32,120 INFO L226 Difference]: Without dead ends: 12176 [2021-08-06 19:33:32,120 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 196.3ms TimeCoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:33:32,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12176 states. [2021-08-06 19:33:32,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12176 to 9943. [2021-08-06 19:33:32,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9943 states, 9942 states have (on average 2.340173003419835) internal successors, (23266), 9942 states have internal predecessors, (23266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:32,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9943 states to 9943 states and 23266 transitions. [2021-08-06 19:33:32,299 INFO L78 Accepts]: Start accepts. Automaton has 9943 states and 23266 transitions. Word has length 21 [2021-08-06 19:33:32,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:32,299 INFO L470 AbstractCegarLoop]: Abstraction has 9943 states and 23266 transitions. [2021-08-06 19:33:32,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:32,299 INFO L276 IsEmpty]: Start isEmpty. Operand 9943 states and 23266 transitions. [2021-08-06 19:33:32,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:33:32,304 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:32,304 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:32,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:32,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-06 19:33:32,522 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:32,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:32,523 INFO L82 PathProgramCache]: Analyzing trace with hash 390129584, now seen corresponding path program 142 times [2021-08-06 19:33:32,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:32,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476884770] [2021-08-06 19:33:32,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:32,523 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:32,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:32,690 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:33:32,691 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:33:32,706 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:33:32,707 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:33:32,710 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 19:33:32,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:32,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476884770] [2021-08-06 19:33:32,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476884770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:32,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96104946] [2021-08-06 19:33:32,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:33:32,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:32,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:32,711 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:32,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-06 19:33:33,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:33:33,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:33,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:33:33,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:33,910 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 19:33:33,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96104946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:33,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:33,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 19:33:33,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540761628] [2021-08-06 19:33:33,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 19:33:33,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:33,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 19:33:33,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:33:33,911 INFO L87 Difference]: Start difference. First operand 9943 states and 23266 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:34,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:34,056 INFO L93 Difference]: Finished difference Result 13459 states and 30274 transitions. [2021-08-06 19:33:34,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:33:34,056 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 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 22 [2021-08-06 19:33:34,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:34,072 INFO L225 Difference]: With dead ends: 13459 [2021-08-06 19:33:34,072 INFO L226 Difference]: Without dead ends: 13459 [2021-08-06 19:33:34,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 224.7ms TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:33:34,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13459 states. [2021-08-06 19:33:34,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13459 to 10373. [2021-08-06 19:33:34,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10373 states, 10372 states have (on average 2.3237562668723486) internal successors, (24102), 10372 states have internal predecessors, (24102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:34,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10373 states to 10373 states and 24102 transitions. [2021-08-06 19:33:34,228 INFO L78 Accepts]: Start accepts. Automaton has 10373 states and 24102 transitions. Word has length 22 [2021-08-06 19:33:34,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:34,229 INFO L470 AbstractCegarLoop]: Abstraction has 10373 states and 24102 transitions. [2021-08-06 19:33:34,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:34,229 INFO L276 IsEmpty]: Start isEmpty. Operand 10373 states and 24102 transitions. [2021-08-06 19:33:34,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:33:34,236 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:34,236 INFO L512 BasicCegarLoop]: trace histogram [11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:34,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:34,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-06 19:33:34,454 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:34,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:34,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1175765765, now seen corresponding path program 143 times [2021-08-06 19:33:34,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:34,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968612880] [2021-08-06 19:33:34,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:34,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:34,679 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:33:34,680 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:33:34,695 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:33:34,695 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:33:34,698 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 19:33:34,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:34,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968612880] [2021-08-06 19:33:34,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968612880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:34,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241022888] [2021-08-06 19:33:34,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:33:34,699 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:34,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:34,699 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:34,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-08-06 19:33:35,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 19:33:35,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:35,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 19:33:35,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 19:33:35,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241022888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:35,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:35,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 19:33:35,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762558698] [2021-08-06 19:33:35,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 19:33:35,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:35,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 19:33:35,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:33:35,976 INFO L87 Difference]: Start difference. First operand 10373 states and 24102 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:36,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:36,171 INFO L93 Difference]: Finished difference Result 15102 states and 33544 transitions. [2021-08-06 19:33:36,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:33:36,172 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:33:36,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:36,193 INFO L225 Difference]: With dead ends: 15102 [2021-08-06 19:33:36,193 INFO L226 Difference]: Without dead ends: 15102 [2021-08-06 19:33:36,194 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 290.6ms TimeCoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:33:36,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15102 states. [2021-08-06 19:33:36,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15102 to 10986. [2021-08-06 19:33:36,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10986 states, 10985 states have (on average 2.3042330450614474) internal successors, (25312), 10985 states have internal predecessors, (25312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:36,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10986 states to 10986 states and 25312 transitions. [2021-08-06 19:33:36,385 INFO L78 Accepts]: Start accepts. Automaton has 10986 states and 25312 transitions. Word has length 23 [2021-08-06 19:33:36,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:36,385 INFO L470 AbstractCegarLoop]: Abstraction has 10986 states and 25312 transitions. [2021-08-06 19:33:36,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:36,386 INFO L276 IsEmpty]: Start isEmpty. Operand 10986 states and 25312 transitions. [2021-08-06 19:33:36,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:33:36,394 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:36,394 INFO L512 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:36,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:36,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-08-06 19:33:36,612 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:36,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:36,612 INFO L82 PathProgramCache]: Analyzing trace with hash -239316400, now seen corresponding path program 144 times [2021-08-06 19:33:36,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:36,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701111486] [2021-08-06 19:33:36,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:36,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:36,745 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:36,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:36,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701111486] [2021-08-06 19:33:36,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701111486] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:36,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661678127] [2021-08-06 19:33:36,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:33:36,746 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:36,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:36,747 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:36,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-08-06 19:33:37,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 19:33:37,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:37,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 19:33:37,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:38,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:33:38,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-08-06 19:34:15,063 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:15,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661678127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:15,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:15,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-08-06 19:34:15,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182510322] [2021-08-06 19:34:15,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 19:34:15,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:15,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 19:34:15,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:34:15,064 INFO L87 Difference]: Start difference. First operand 10986 states and 25312 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:15,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:15,437 INFO L93 Difference]: Finished difference Result 11156 states and 25611 transitions. [2021-08-06 19:34:15,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:34:15,438 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 19:34:15,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:15,454 INFO L225 Difference]: With dead ends: 11156 [2021-08-06 19:34:15,454 INFO L226 Difference]: Without dead ends: 11153 [2021-08-06 19:34:15,454 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 371.3ms TimeCoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:34:15,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11153 states. [2021-08-06 19:34:15,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11153 to 11054. [2021-08-06 19:34:15,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11054 states, 11053 states have (on average 2.307608793992581) internal successors, (25506), 11053 states have internal predecessors, (25506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:15,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11054 states to 11054 states and 25506 transitions. [2021-08-06 19:34:15,637 INFO L78 Accepts]: Start accepts. Automaton has 11054 states and 25506 transitions. Word has length 24 [2021-08-06 19:34:15,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:15,637 INFO L470 AbstractCegarLoop]: Abstraction has 11054 states and 25506 transitions. [2021-08-06 19:34:15,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:15,637 INFO L276 IsEmpty]: Start isEmpty. Operand 11054 states and 25506 transitions. [2021-08-06 19:34:15,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:34:15,645 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:15,645 INFO L512 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:15,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:15,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:15,861 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:15,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:15,863 INFO L82 PathProgramCache]: Analyzing trace with hash -338359554, now seen corresponding path program 145 times [2021-08-06 19:34:15,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:15,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593663716] [2021-08-06 19:34:15,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:15,863 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:15,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:15,964 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:15,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:15,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593663716] [2021-08-06 19:34:15,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593663716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:15,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911584166] [2021-08-06 19:34:15,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:34:15,964 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:15,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:15,965 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:15,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-08-06 19:34:16,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:16,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 19:34:16,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:17,571 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:34:17,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-08-06 19:34:35,737 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:35,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911584166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:35,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:35,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-08-06 19:34:35,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372341310] [2021-08-06 19:34:35,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 19:34:35,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:35,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 19:34:35,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:34:35,738 INFO L87 Difference]: Start difference. First operand 11054 states and 25506 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-08-06 19:34:36,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:36,062 INFO L93 Difference]: Finished difference Result 11265 states and 25902 transitions. [2021-08-06 19:34:36,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:34:36,062 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) Word has length 24 [2021-08-06 19:34:36,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:36,079 INFO L225 Difference]: With dead ends: 11265 [2021-08-06 19:34:36,079 INFO L226 Difference]: Without dead ends: 11262 [2021-08-06 19:34:36,079 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 273.0ms TimeCoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:34:36,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11262 states. [2021-08-06 19:34:36,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11262 to 11143. [2021-08-06 19:34:36,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11143 states, 11142 states have (on average 2.3128702207862144) internal successors, (25770), 11142 states have internal predecessors, (25770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:36,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11143 states to 11143 states and 25770 transitions. [2021-08-06 19:34:36,237 INFO L78 Accepts]: Start accepts. Automaton has 11143 states and 25770 transitions. Word has length 24 [2021-08-06 19:34:36,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:36,237 INFO L470 AbstractCegarLoop]: Abstraction has 11143 states and 25770 transitions. [2021-08-06 19:34:36,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-08-06 19:34:36,238 INFO L276 IsEmpty]: Start isEmpty. Operand 11143 states and 25770 transitions. [2021-08-06 19:34:36,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:34:36,246 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:36,246 INFO L512 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:36,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:36,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:36,461 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:36,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:36,461 INFO L82 PathProgramCache]: Analyzing trace with hash -156645770, now seen corresponding path program 146 times [2021-08-06 19:34:36,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:36,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055896210] [2021-08-06 19:34:36,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:36,462 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:36,579 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:36,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:36,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055896210] [2021-08-06 19:34:36,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055896210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:36,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404102237] [2021-08-06 19:34:36,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:34:36,580 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:36,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:36,581 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:36,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-08-06 19:34:37,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:34:37,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:37,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 19:34:37,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:38,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:34:38,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-08-06 19:34:55,754 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:55,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404102237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:55,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:55,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-08-06 19:34:55,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055299160] [2021-08-06 19:34:55,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 19:34:55,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:55,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 19:34:55,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:34:55,755 INFO L87 Difference]: Start difference. First operand 11143 states and 25770 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-08-06 19:34:56,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:56,161 INFO L93 Difference]: Finished difference Result 11378 states and 26230 transitions. [2021-08-06 19:34:56,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:34:56,161 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) Word has length 24 [2021-08-06 19:34:56,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:56,176 INFO L225 Difference]: With dead ends: 11378 [2021-08-06 19:34:56,177 INFO L226 Difference]: Without dead ends: 11375 [2021-08-06 19:34:56,177 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 331.7ms TimeCoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:34:56,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11375 states. [2021-08-06 19:34:56,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11375 to 11252. [2021-08-06 19:34:56,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11252 states, 11251 states have (on average 2.3189049862234468) internal successors, (26090), 11251 states have internal predecessors, (26090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:56,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11252 states to 11252 states and 26090 transitions. [2021-08-06 19:34:56,332 INFO L78 Accepts]: Start accepts. Automaton has 11252 states and 26090 transitions. Word has length 24 [2021-08-06 19:34:56,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:56,332 INFO L470 AbstractCegarLoop]: Abstraction has 11252 states and 26090 transitions. [2021-08-06 19:34:56,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-08-06 19:34:56,332 INFO L276 IsEmpty]: Start isEmpty. Operand 11252 states and 26090 transitions. [2021-08-06 19:34:56,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:34:56,342 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:56,342 INFO L512 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:56,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:56,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-08-06 19:34:56,560 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:56,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:56,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1181514238, now seen corresponding path program 147 times [2021-08-06 19:34:56,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:56,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119237672] [2021-08-06 19:34:56,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:56,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:56,696 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:56,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:56,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119237672] [2021-08-06 19:34:56,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119237672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:56,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928576923] [2021-08-06 19:34:56,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:34:56,696 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:56,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:56,697 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:56,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-08-06 19:34:57,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 19:34:57,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:57,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 19:34:57,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:58,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:34:58,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-08-06 19:35:42,845 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:42,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928576923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:42,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:42,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-08-06 19:35:42,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832868584] [2021-08-06 19:35:42,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 19:35:42,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:42,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 19:35:42,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:35:42,848 INFO L87 Difference]: Start difference. First operand 11252 states and 26090 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-08-06 19:35:43,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:43,232 INFO L93 Difference]: Finished difference Result 11522 states and 26653 transitions. [2021-08-06 19:35:43,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:35:43,232 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) Word has length 24 [2021-08-06 19:35:43,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:43,248 INFO L225 Difference]: With dead ends: 11522 [2021-08-06 19:35:43,248 INFO L226 Difference]: Without dead ends: 11519 [2021-08-06 19:35:43,249 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 345.6ms TimeCoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:35:43,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11519 states. [2021-08-06 19:35:43,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11519 to 11399. [2021-08-06 19:35:43,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11399 states, 11398 states have (on average 2.326373047903141) internal successors, (26516), 11398 states have internal predecessors, (26516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:43,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11399 states to 11399 states and 26516 transitions. [2021-08-06 19:35:43,409 INFO L78 Accepts]: Start accepts. Automaton has 11399 states and 26516 transitions. Word has length 24 [2021-08-06 19:35:43,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:43,409 INFO L470 AbstractCegarLoop]: Abstraction has 11399 states and 26516 transitions. [2021-08-06 19:35:43,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-08-06 19:35:43,409 INFO L276 IsEmpty]: Start isEmpty. Operand 11399 states and 26516 transitions. [2021-08-06 19:35:43,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:35:43,418 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:43,418 INFO L512 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:43,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2021-08-06 19:35:43,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:43,633 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:43,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:43,633 INFO L82 PathProgramCache]: Analyzing trace with hash -285198474, now seen corresponding path program 148 times [2021-08-06 19:35:43,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:43,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413457366] [2021-08-06 19:35:43,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:43,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:43,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:43,790 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:35:43,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:43,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413457366] [2021-08-06 19:35:43,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413457366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:43,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634028364] [2021-08-06 19:35:43,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:35:43,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:43,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:43,792 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:43,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-08-06 19:35:44,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:35:44,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:44,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 19:35:44,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:45,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:35:45,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-08-06 19:36:06,951 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:06,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634028364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:06,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:06,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-08-06 19:36:06,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598693430] [2021-08-06 19:36:06,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 19:36:06,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:06,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 19:36:06,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:36:06,952 INFO L87 Difference]: Start difference. First operand 11399 states and 26516 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-08-06 19:36:07,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:07,367 INFO L93 Difference]: Finished difference Result 11771 states and 27367 transitions. [2021-08-06 19:36:07,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:36:07,368 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) Word has length 24 [2021-08-06 19:36:07,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:07,382 INFO L225 Difference]: With dead ends: 11771 [2021-08-06 19:36:07,382 INFO L226 Difference]: Without dead ends: 11768 [2021-08-06 19:36:07,383 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 295.8ms TimeCoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:36:07,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11768 states. [2021-08-06 19:36:07,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11768 to 11648. [2021-08-06 19:36:07,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11648 states, 11647 states have (on average 2.33776938267365) internal successors, (27228), 11647 states have internal predecessors, (27228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:07,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11648 states to 11648 states and 27228 transitions. [2021-08-06 19:36:07,662 INFO L78 Accepts]: Start accepts. Automaton has 11648 states and 27228 transitions. Word has length 24 [2021-08-06 19:36:07,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:07,662 INFO L470 AbstractCegarLoop]: Abstraction has 11648 states and 27228 transitions. [2021-08-06 19:36:07,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-08-06 19:36:07,662 INFO L276 IsEmpty]: Start isEmpty. Operand 11648 states and 27228 transitions. [2021-08-06 19:36:07,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:36:07,669 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:07,669 INFO L512 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:07,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2021-08-06 19:36:07,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:07,885 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:07,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:07,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1491347710, now seen corresponding path program 149 times [2021-08-06 19:36:07,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:07,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474558643] [2021-08-06 19:36:07,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:07,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:07,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:08,010 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:36:08,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:08,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474558643] [2021-08-06 19:36:08,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474558643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:08,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658632933] [2021-08-06 19:36:08,010 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:36:08,010 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:08,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:08,011 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:08,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-08-06 19:36:09,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 19:36:09,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:09,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 19:36:09,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:09,852 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:36:09,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-08-06 19:36:33,077 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:33,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658632933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:33,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:33,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-08-06 19:36:33,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338493784] [2021-08-06 19:36:33,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 19:36:33,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:33,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 19:36:33,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:36:33,078 INFO L87 Difference]: Start difference. First operand 11648 states and 27228 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-08-06 19:36:33,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:33,484 INFO L93 Difference]: Finished difference Result 12404 states and 29100 transitions. [2021-08-06 19:36:33,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:36:33,484 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) Word has length 24 [2021-08-06 19:36:33,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:33,500 INFO L225 Difference]: With dead ends: 12404 [2021-08-06 19:36:33,500 INFO L226 Difference]: Without dead ends: 12401 [2021-08-06 19:36:33,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 352.3ms TimeCoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:36:33,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12401 states. [2021-08-06 19:36:33,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12401 to 12283. [2021-08-06 19:36:33,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12283 states, 12282 states have (on average 2.358166422406774) internal successors, (28963), 12282 states have internal predecessors, (28963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:33,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12283 states to 12283 states and 28963 transitions. [2021-08-06 19:36:33,656 INFO L78 Accepts]: Start accepts. Automaton has 12283 states and 28963 transitions. Word has length 24 [2021-08-06 19:36:33,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:33,656 INFO L470 AbstractCegarLoop]: Abstraction has 12283 states and 28963 transitions. [2021-08-06 19:36:33,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-08-06 19:36:33,657 INFO L276 IsEmpty]: Start isEmpty. Operand 12283 states and 28963 transitions. [2021-08-06 19:36:33,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:36:33,665 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:33,665 INFO L512 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:33,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2021-08-06 19:36:33,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:33,884 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:33,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:33,884 INFO L82 PathProgramCache]: Analyzing trace with hash 729704566, now seen corresponding path program 150 times [2021-08-06 19:36:33,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:33,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320910274] [2021-08-06 19:36:33,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:33,884 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:34,013 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:36:34,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:34,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320910274] [2021-08-06 19:36:34,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320910274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:34,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760135975] [2021-08-06 19:36:34,013 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:36:34,013 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:34,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:34,014 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:34,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-08-06 19:36:35,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 19:36:35,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:35,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 19:36:35,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:35,759 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:36:35,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-08-06 19:37:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:03,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760135975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:03,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:03,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-08-06 19:37:03,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594378308] [2021-08-06 19:37:03,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 19:37:03,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:03,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 19:37:03,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:37:03,694 INFO L87 Difference]: Start difference. First operand 12283 states and 28963 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-08-06 19:37:04,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:04,146 INFO L93 Difference]: Finished difference Result 13314 states and 31514 transitions. [2021-08-06 19:37:04,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:37:04,146 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) Word has length 24 [2021-08-06 19:37:04,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:04,164 INFO L225 Difference]: With dead ends: 13314 [2021-08-06 19:37:04,164 INFO L226 Difference]: Without dead ends: 13311 [2021-08-06 19:37:04,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 299.6ms TimeCoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:37:04,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13311 states. [2021-08-06 19:37:04,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13311 to 13193. [2021-08-06 19:37:04,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13193 states, 13192 states have (on average 2.378411158277744) internal successors, (31376), 13192 states have internal predecessors, (31376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:04,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13193 states to 13193 states and 31376 transitions. [2021-08-06 19:37:04,362 INFO L78 Accepts]: Start accepts. Automaton has 13193 states and 31376 transitions. Word has length 24 [2021-08-06 19:37:04,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:04,362 INFO L470 AbstractCegarLoop]: Abstraction has 13193 states and 31376 transitions. [2021-08-06 19:37:04,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-08-06 19:37:04,362 INFO L276 IsEmpty]: Start isEmpty. Operand 13193 states and 31376 transitions. [2021-08-06 19:37:04,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:37:04,373 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:04,373 INFO L512 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:04,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2021-08-06 19:37:04,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:04,594 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:04,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:04,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1406396418, now seen corresponding path program 151 times [2021-08-06 19:37:04,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:04,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731645262] [2021-08-06 19:37:04,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:04,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:04,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:04,673 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:37:04,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:04,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731645262] [2021-08-06 19:37:04,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731645262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:04,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997111093] [2021-08-06 19:37:04,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:37:04,674 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:04,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:04,674 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:04,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-08-06 19:37:05,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:05,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 19:37:05,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:06,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:37:06,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-08-06 19:37:24,629 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:24,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997111093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:24,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:24,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-08-06 19:37:24,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263222734] [2021-08-06 19:37:24,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 19:37:24,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:24,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 19:37:24,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:37:24,630 INFO L87 Difference]: Start difference. First operand 13193 states and 31376 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-08-06 19:37:25,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:25,041 INFO L93 Difference]: Finished difference Result 14679 states and 34980 transitions. [2021-08-06 19:37:25,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:37:25,041 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) Word has length 24 [2021-08-06 19:37:25,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:25,060 INFO L225 Difference]: With dead ends: 14679 [2021-08-06 19:37:25,061 INFO L226 Difference]: Without dead ends: 14676 [2021-08-06 19:37:25,061 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 258.7ms TimeCoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:37:25,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14676 states. [2021-08-06 19:37:25,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14676 to 14560. [2021-08-06 19:37:25,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14560 states, 14559 states have (on average 2.393227556837695) internal successors, (34843), 14559 states have internal predecessors, (34843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:25,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14560 states to 14560 states and 34843 transitions. [2021-08-06 19:37:25,278 INFO L78 Accepts]: Start accepts. Automaton has 14560 states and 34843 transitions. Word has length 24 [2021-08-06 19:37:25,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:25,278 INFO L470 AbstractCegarLoop]: Abstraction has 14560 states and 34843 transitions. [2021-08-06 19:37:25,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-08-06 19:37:25,278 INFO L276 IsEmpty]: Start isEmpty. Operand 14560 states and 34843 transitions. [2021-08-06 19:37:25,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:37:25,289 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:25,289 INFO L512 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:25,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2021-08-06 19:37:25,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:25,505 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:25,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:25,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1093949814, now seen corresponding path program 152 times [2021-08-06 19:37:25,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:25,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101418966] [2021-08-06 19:37:25,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:25,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:25,631 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:37:25,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:25,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101418966] [2021-08-06 19:37:25,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101418966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:25,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264582633] [2021-08-06 19:37:25,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:37:25,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:25,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:25,633 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:25,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2021-08-06 19:37:26,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:37:26,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:26,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 19:37:26,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:27,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:37:27,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-08-06 19:38:03,067 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:03,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264582633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:03,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:03,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-08-06 19:38:03,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761911815] [2021-08-06 19:38:03,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 19:38:03,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:03,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 19:38:03,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:38:03,068 INFO L87 Difference]: Start difference. First operand 14560 states and 34843 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-08-06 19:38:03,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:03,601 INFO L93 Difference]: Finished difference Result 17013 states and 40601 transitions. [2021-08-06 19:38:03,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:38:03,601 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) Word has length 24 [2021-08-06 19:38:03,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:03,626 INFO L225 Difference]: With dead ends: 17013 [2021-08-06 19:38:03,626 INFO L226 Difference]: Without dead ends: 17010 [2021-08-06 19:38:03,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 340.3ms TimeCoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:38:03,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17010 states. [2021-08-06 19:38:03,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17010 to 16912. [2021-08-06 19:38:03,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16912 states, 16911 states have (on average 2.3944178345455622) internal successors, (40492), 16911 states have internal predecessors, (40492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:03,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16912 states to 16912 states and 40492 transitions. [2021-08-06 19:38:03,879 INFO L78 Accepts]: Start accepts. Automaton has 16912 states and 40492 transitions. Word has length 24 [2021-08-06 19:38:03,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:03,879 INFO L470 AbstractCegarLoop]: Abstraction has 16912 states and 40492 transitions. [2021-08-06 19:38:03,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-08-06 19:38:03,879 INFO L276 IsEmpty]: Start isEmpty. Operand 16912 states and 40492 transitions. [2021-08-06 19:38:03,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:38:03,892 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:03,892 INFO L512 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:03,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2021-08-06 19:38:04,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-08-06 19:38:04,106 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:04,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:04,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1295271678, now seen corresponding path program 153 times [2021-08-06 19:38:04,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:04,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251079750] [2021-08-06 19:38:04,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:04,107 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:04,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:38:04,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:04,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251079750] [2021-08-06 19:38:04,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251079750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:04,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899803153] [2021-08-06 19:38:04,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:38:04,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:04,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:04,218 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:04,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-08-06 19:38:05,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 19:38:05,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:05,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 19:38:05,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:06,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:38:06,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-08-06 19:38:23,026 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:23,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899803153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:23,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:23,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-08-06 19:38:23,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296240348] [2021-08-06 19:38:23,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 19:38:23,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:23,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 19:38:23,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:38:23,027 INFO L87 Difference]: Start difference. First operand 16912 states and 40492 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-08-06 19:38:23,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:23,446 INFO L93 Difference]: Finished difference Result 20756 states and 49145 transitions. [2021-08-06 19:38:23,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:38:23,446 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) Word has length 24 [2021-08-06 19:38:23,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:23,488 INFO L225 Difference]: With dead ends: 20756 [2021-08-06 19:38:23,488 INFO L226 Difference]: Without dead ends: 20753 [2021-08-06 19:38:23,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 338.1ms TimeCoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:38:23,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20753 states. [2021-08-06 19:38:23,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20753 to 20660. [2021-08-06 19:38:23,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20660 states, 20659 states have (on average 2.373977443245075) internal successors, (49044), 20659 states have internal predecessors, (49044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:23,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20660 states to 20660 states and 49044 transitions. [2021-08-06 19:38:23,806 INFO L78 Accepts]: Start accepts. Automaton has 20660 states and 49044 transitions. Word has length 24 [2021-08-06 19:38:23,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:23,806 INFO L470 AbstractCegarLoop]: Abstraction has 20660 states and 49044 transitions. [2021-08-06 19:38:23,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-08-06 19:38:23,807 INFO L276 IsEmpty]: Start isEmpty. Operand 20660 states and 49044 transitions. [2021-08-06 19:38:23,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:38:23,822 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:23,822 INFO L512 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:23,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2021-08-06 19:38:24,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:24,042 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:24,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:24,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1053685130, now seen corresponding path program 154 times [2021-08-06 19:38:24,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:24,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952536836] [2021-08-06 19:38:24,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:24,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:24,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:24,140 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:38:24,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:24,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952536836] [2021-08-06 19:38:24,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952536836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:24,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990999085] [2021-08-06 19:38:24,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:38:24,141 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:24,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:24,141 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:24,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2021-08-06 19:38:25,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:38:25,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:25,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 19:38:25,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:26,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:38:26,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-08-06 19:39:31,060 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:31,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990999085] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:31,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:39:31,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-08-06 19:39:31,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858681546] [2021-08-06 19:39:31,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 19:39:31,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:39:31,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 19:39:31,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:39:31,061 INFO L87 Difference]: Start difference. First operand 20660 states and 49044 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-08-06 19:39:31,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:39:31,594 INFO L93 Difference]: Finished difference Result 24644 states and 57884 transitions. [2021-08-06 19:39:31,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:39:31,594 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) Word has length 24 [2021-08-06 19:39:31,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:39:31,634 INFO L225 Difference]: With dead ends: 24644 [2021-08-06 19:39:31,634 INFO L226 Difference]: Without dead ends: 24641 [2021-08-06 19:39:31,634 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 283.4ms TimeCoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:39:31,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24641 states. [2021-08-06 19:39:32,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24641 to 24549. [2021-08-06 19:39:32,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24549 states, 24548 states have (on average 2.3539188528597035) internal successors, (57784), 24548 states have internal predecessors, (57784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:32,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24549 states to 24549 states and 57784 transitions. [2021-08-06 19:39:32,070 INFO L78 Accepts]: Start accepts. Automaton has 24549 states and 57784 transitions. Word has length 24 [2021-08-06 19:39:32,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:39:32,071 INFO L470 AbstractCegarLoop]: Abstraction has 24549 states and 57784 transitions. [2021-08-06 19:39:32,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-08-06 19:39:32,071 INFO L276 IsEmpty]: Start isEmpty. Operand 24549 states and 57784 transitions. [2021-08-06 19:39:32,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:39:32,088 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:39:32,088 INFO L512 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:39:32,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2021-08-06 19:39:32,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-08-06 19:39:32,307 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:39:32,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:39:32,310 INFO L82 PathProgramCache]: Analyzing trace with hash -856902146, now seen corresponding path program 155 times [2021-08-06 19:39:32,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:39:32,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808383724] [2021-08-06 19:39:32,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:39:32,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:39:32,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:32,429 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:39:32,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:39:32,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808383724] [2021-08-06 19:39:32,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808383724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:32,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036398042] [2021-08-06 19:39:32,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:39:32,430 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:32,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:39:32,430 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:39:32,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2021-08-06 19:39:33,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 19:39:33,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:39:33,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 19:39:33,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:34,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:39:34,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-08-06 19:40:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:11,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036398042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:11,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:40:11,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-08-06 19:40:11,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821969706] [2021-08-06 19:40:11,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 19:40:11,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:40:11,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 19:40:11,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:40:11,689 INFO L87 Difference]: Start difference. First operand 24549 states and 57784 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-08-06 19:40:12,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:40:12,251 INFO L93 Difference]: Finished difference Result 28127 states and 65656 transitions. [2021-08-06 19:40:12,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:40:12,251 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) Word has length 24 [2021-08-06 19:40:12,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:40:12,302 INFO L225 Difference]: With dead ends: 28127 [2021-08-06 19:40:12,302 INFO L226 Difference]: Without dead ends: 28124 [2021-08-06 19:40:12,302 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 347.1ms TimeCoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:40:12,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28124 states. [2021-08-06 19:40:12,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28124 to 28033. [2021-08-06 19:40:12,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28033 states, 28032 states have (on average 2.338648687214612) internal successors, (65557), 28032 states have internal predecessors, (65557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:12,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28033 states to 28033 states and 65557 transitions. [2021-08-06 19:40:12,767 INFO L78 Accepts]: Start accepts. Automaton has 28033 states and 65557 transitions. Word has length 24 [2021-08-06 19:40:12,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:40:12,767 INFO L470 AbstractCegarLoop]: Abstraction has 28033 states and 65557 transitions. [2021-08-06 19:40:12,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-08-06 19:40:12,767 INFO L276 IsEmpty]: Start isEmpty. Operand 28033 states and 65557 transitions. [2021-08-06 19:40:12,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:40:12,786 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:40:12,787 INFO L512 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:40:12,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2021-08-06 19:40:13,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-08-06 19:40:13,006 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:40:13,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:40:13,006 INFO L82 PathProgramCache]: Analyzing trace with hash 948403062, now seen corresponding path program 156 times [2021-08-06 19:40:13,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:40:13,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296386781] [2021-08-06 19:40:13,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:40:13,007 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:40:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:40:13,135 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:40:13,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:40:13,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296386781] [2021-08-06 19:40:13,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296386781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:13,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851485476] [2021-08-06 19:40:13,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:40:13,136 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:40:13,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:40:13,137 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:40:13,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2021-08-06 19:40:14,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 19:40:14,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:40:14,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 19:40:14,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:40:15,247 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:40:15,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-08-06 19:41:00,046 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:00,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851485476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:00,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:41:00,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-08-06 19:41:00,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098387066] [2021-08-06 19:41:00,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 19:41:00,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:00,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 19:41:00,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:41:00,047 INFO L87 Difference]: Start difference. First operand 28033 states and 65557 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-08-06 19:41:00,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:00,686 INFO L93 Difference]: Finished difference Result 30427 states and 70770 transitions. [2021-08-06 19:41:00,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:41:00,687 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) Word has length 24 [2021-08-06 19:41:00,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:00,740 INFO L225 Difference]: With dead ends: 30427 [2021-08-06 19:41:00,740 INFO L226 Difference]: Without dead ends: 30424 [2021-08-06 19:41:00,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 349.8ms TimeCoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:41:00,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30424 states. [2021-08-06 19:41:01,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30424 to 30340. [2021-08-06 19:41:01,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30340 states, 30339 states have (on average 2.3297735587857216) internal successors, (70683), 30339 states have internal predecessors, (70683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:01,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30340 states to 30340 states and 70683 transitions. [2021-08-06 19:41:01,279 INFO L78 Accepts]: Start accepts. Automaton has 30340 states and 70683 transitions. Word has length 24 [2021-08-06 19:41:01,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:01,279 INFO L470 AbstractCegarLoop]: Abstraction has 30340 states and 70683 transitions. [2021-08-06 19:41:01,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-08-06 19:41:01,279 INFO L276 IsEmpty]: Start isEmpty. Operand 30340 states and 70683 transitions. [2021-08-06 19:41:01,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:41:01,300 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:01,300 INFO L512 BasicCegarLoop]: trace histogram [13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:41:01,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2021-08-06 19:41:01,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-08-06 19:41:01,520 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:41:01,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:01,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1157190555, now seen corresponding path program 157 times [2021-08-06 19:41:01,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:01,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554925497] [2021-08-06 19:41:01,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:01,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:01,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:01,672 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 66 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:01,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:01,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554925497] [2021-08-06 19:41:01,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554925497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:01,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185249845] [2021-08-06 19:41:01,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:41:01,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:01,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:41:01,674 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:41:01,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2021-08-06 19:41:02,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:02,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:41:02,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:41:02,971 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:41:02,971 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:41:02,985 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 78 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:02,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185249845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:02,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:41:02,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-08-06 19:41:02,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586209712] [2021-08-06 19:41:02,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 19:41:02,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:02,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 19:41:02,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:41:02,985 INFO L87 Difference]: Start difference. First operand 30340 states and 70683 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:03,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:03,307 INFO L93 Difference]: Finished difference Result 30411 states and 70787 transitions. [2021-08-06 19:41:03,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:41:03,308 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:41:03,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:03,364 INFO L225 Difference]: With dead ends: 30411 [2021-08-06 19:41:03,364 INFO L226 Difference]: Without dead ends: 30411 [2021-08-06 19:41:03,364 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 244.0ms TimeCoverageRelationStatistics Valid=426, Invalid=834, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 19:41:03,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30411 states. [2021-08-06 19:41:03,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30411 to 30295. [2021-08-06 19:41:03,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30295 states, 30294 states have (on average 2.328877005347594) internal successors, (70551), 30294 states have internal predecessors, (70551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:03,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30295 states to 30295 states and 70551 transitions. [2021-08-06 19:41:04,000 INFO L78 Accepts]: Start accepts. Automaton has 30295 states and 70551 transitions. Word has length 25 [2021-08-06 19:41:04,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:04,000 INFO L470 AbstractCegarLoop]: Abstraction has 30295 states and 70551 transitions. [2021-08-06 19:41:04,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:04,000 INFO L276 IsEmpty]: Start isEmpty. Operand 30295 states and 70551 transitions. [2021-08-06 19:41:04,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:41:04,021 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:04,021 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:41:04,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2021-08-06 19:41:04,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:04,236 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:41:04,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:04,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1194201621, now seen corresponding path program 158 times [2021-08-06 19:41:04,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:04,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053938638] [2021-08-06 19:41:04,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:04,236 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:04,391 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:04,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:04,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053938638] [2021-08-06 19:41:04,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053938638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:04,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797233257] [2021-08-06 19:41:04,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:41:04,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:04,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:41:04,392 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:41:04,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2021-08-06 19:41:05,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:41:05,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:41:05,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:41:05,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:41:05,736 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:41:05,736 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:41:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:05,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797233257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:05,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:41:05,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-08-06 19:41:05,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491953069] [2021-08-06 19:41:05,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 19:41:05,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:05,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 19:41:05,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:41:05,754 INFO L87 Difference]: Start difference. First operand 30295 states and 70551 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:06,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:06,191 INFO L93 Difference]: Finished difference Result 30479 states and 70800 transitions. [2021-08-06 19:41:06,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 19:41:06,191 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:41:06,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:06,256 INFO L225 Difference]: With dead ends: 30479 [2021-08-06 19:41:06,256 INFO L226 Difference]: Without dead ends: 30475 [2021-08-06 19:41:06,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 353.0ms TimeCoverageRelationStatistics Valid=663, Invalid=1317, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 19:41:06,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30475 states. [2021-08-06 19:41:07,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30475 to 30330. [2021-08-06 19:41:07,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30330 states, 30329 states have (on average 2.3283985624319956) internal successors, (70618), 30329 states have internal predecessors, (70618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:07,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30330 states to 30330 states and 70618 transitions. [2021-08-06 19:41:07,098 INFO L78 Accepts]: Start accepts. Automaton has 30330 states and 70618 transitions. Word has length 25 [2021-08-06 19:41:07,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:07,098 INFO L470 AbstractCegarLoop]: Abstraction has 30330 states and 70618 transitions. [2021-08-06 19:41:07,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:07,098 INFO L276 IsEmpty]: Start isEmpty. Operand 30330 states and 70618 transitions. [2021-08-06 19:41:07,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:41:07,119 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:07,119 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:41:07,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2021-08-06 19:41:07,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:07,333 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:41:07,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:07,333 INFO L82 PathProgramCache]: Analyzing trace with hash 518773653, now seen corresponding path program 159 times [2021-08-06 19:41:07,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:07,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242670850] [2021-08-06 19:41:07,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:07,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:07,467 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:07,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:07,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242670850] [2021-08-06 19:41:07,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242670850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:07,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815871432] [2021-08-06 19:41:07,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:41:07,468 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:07,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:41:07,468 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:41:07,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2021-08-06 19:41:08,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 19:41:08,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:41:08,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:41:08,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:41:08,650 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:41:08,651 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:41:08,664 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:08,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815871432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:08,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:41:08,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-06 19:41:08,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825062222] [2021-08-06 19:41:08,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:41:08,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:08,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:41:08,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:41:08,665 INFO L87 Difference]: Start difference. First operand 30330 states and 70618 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:08,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:08,827 INFO L93 Difference]: Finished difference Result 30845 states and 71537 transitions. [2021-08-06 19:41:08,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:41:08,828 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:41:08,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:08,891 INFO L225 Difference]: With dead ends: 30845 [2021-08-06 19:41:08,892 INFO L226 Difference]: Without dead ends: 30845 [2021-08-06 19:41:08,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:41:08,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30845 states. [2021-08-06 19:41:09,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30845 to 30276. [2021-08-06 19:41:09,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30276 states, 30275 states have (on average 2.3274979355904213) internal successors, (70465), 30275 states have internal predecessors, (70465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:09,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30276 states to 30276 states and 70465 transitions. [2021-08-06 19:41:09,589 INFO L78 Accepts]: Start accepts. Automaton has 30276 states and 70465 transitions. Word has length 25 [2021-08-06 19:41:09,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:09,589 INFO L470 AbstractCegarLoop]: Abstraction has 30276 states and 70465 transitions. [2021-08-06 19:41:09,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:09,589 INFO L276 IsEmpty]: Start isEmpty. Operand 30276 states and 70465 transitions. [2021-08-06 19:41:09,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:41:09,611 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:09,612 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:41:09,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2021-08-06 19:41:09,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:09,825 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:41:09,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:09,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1876136153, now seen corresponding path program 160 times [2021-08-06 19:41:09,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:09,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665983152] [2021-08-06 19:41:09,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:09,830 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:09,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:10,043 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 27 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:10,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:10,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665983152] [2021-08-06 19:41:10,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665983152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:10,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142253482] [2021-08-06 19:41:10,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:41:10,043 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:10,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:41:10,044 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:41:10,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2021-08-06 19:41:11,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:41:11,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:41:11,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:41:11,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:41:11,392 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:41:11,393 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:41:11,410 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 28 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:41:11,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142253482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:11,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:41:11,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-06 19:41:11,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20285368] [2021-08-06 19:41:11,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:41:11,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:11,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:41:11,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=151, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:41:11,411 INFO L87 Difference]: Start difference. First operand 30276 states and 70465 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:11,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:11,675 INFO L93 Difference]: Finished difference Result 30421 states and 70648 transitions. [2021-08-06 19:41:11,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:41:11,675 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:41:11,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:11,728 INFO L225 Difference]: With dead ends: 30421 [2021-08-06 19:41:11,728 INFO L226 Difference]: Without dead ends: 30420 [2021-08-06 19:41:11,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 193.1ms TimeCoverageRelationStatistics Valid=329, Invalid=541, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:41:11,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30420 states. [2021-08-06 19:41:12,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30420 to 30290. [2021-08-06 19:41:12,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30290 states, 30289 states have (on average 2.327610683746575) internal successors, (70501), 30289 states have internal predecessors, (70501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:12,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30290 states to 30290 states and 70501 transitions. [2021-08-06 19:41:12,257 INFO L78 Accepts]: Start accepts. Automaton has 30290 states and 70501 transitions. Word has length 25 [2021-08-06 19:41:12,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:12,257 INFO L470 AbstractCegarLoop]: Abstraction has 30290 states and 70501 transitions. [2021-08-06 19:41:12,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:12,257 INFO L276 IsEmpty]: Start isEmpty. Operand 30290 states and 70501 transitions. [2021-08-06 19:41:12,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:41:12,277 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:12,277 INFO L512 BasicCegarLoop]: trace histogram [13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:41:12,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2021-08-06 19:41:12,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:12,483 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:41:12,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:12,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1074519925, now seen corresponding path program 161 times [2021-08-06 19:41:12,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:12,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28316932] [2021-08-06 19:41:12,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:12,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:12,595 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 46 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:12,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:12,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28316932] [2021-08-06 19:41:12,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28316932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:12,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2986101] [2021-08-06 19:41:12,595 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:41:12,595 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:12,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:41:12,596 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:41:12,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2021-08-06 19:41:14,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 19:41:14,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:41:14,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:41:14,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:41:14,193 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:41:14,193 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:41:14,204 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 56 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:41:14,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2986101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:14,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:41:14,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-06 19:41:14,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180842715] [2021-08-06 19:41:14,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:41:14,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:14,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:41:14,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=161, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:41:14,205 INFO L87 Difference]: Start difference. First operand 30290 states and 70501 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:14,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:14,505 INFO L93 Difference]: Finished difference Result 30546 states and 70965 transitions. [2021-08-06 19:41:14,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:41:14,505 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:41:14,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:14,567 INFO L225 Difference]: With dead ends: 30546 [2021-08-06 19:41:14,567 INFO L226 Difference]: Without dead ends: 30546 [2021-08-06 19:41:14,567 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 147.9ms TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:41:14,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30546 states. [2021-08-06 19:41:15,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30546 to 30337. [2021-08-06 19:41:15,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30337 states, 30336 states have (on average 2.3286524261603376) internal successors, (70642), 30336 states have internal predecessors, (70642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:15,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30337 states to 30337 states and 70642 transitions. [2021-08-06 19:41:15,286 INFO L78 Accepts]: Start accepts. Automaton has 30337 states and 70642 transitions. Word has length 25 [2021-08-06 19:41:15,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:15,286 INFO L470 AbstractCegarLoop]: Abstraction has 30337 states and 70642 transitions. [2021-08-06 19:41:15,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:15,286 INFO L276 IsEmpty]: Start isEmpty. Operand 30337 states and 70642 transitions. [2021-08-06 19:41:15,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:41:15,305 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:15,305 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:41:15,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2021-08-06 19:41:15,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:15,525 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:41:15,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:15,525 INFO L82 PathProgramCache]: Analyzing trace with hash 700487437, now seen corresponding path program 162 times [2021-08-06 19:41:15,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:15,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719762012] [2021-08-06 19:41:15,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:15,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:15,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:15,654 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 20 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:15,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:15,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719762012] [2021-08-06 19:41:15,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719762012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:15,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236129913] [2021-08-06 19:41:15,655 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:41:15,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:15,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:41:15,656 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:41:15,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2021-08-06 19:41:17,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 19:41:17,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:41:17,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:41:17,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:41:17,128 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:41:17,128 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:41:17,141 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 21 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:17,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236129913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:17,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:41:17,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-06 19:41:17,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277879542] [2021-08-06 19:41:17,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:41:17,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:17,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:41:17,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=151, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:41:17,142 INFO L87 Difference]: Start difference. First operand 30337 states and 70642 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:17,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:17,316 INFO L93 Difference]: Finished difference Result 30959 states and 71764 transitions. [2021-08-06 19:41:17,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:41:17,316 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:41:17,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:17,375 INFO L225 Difference]: With dead ends: 30959 [2021-08-06 19:41:17,375 INFO L226 Difference]: Without dead ends: 30959 [2021-08-06 19:41:17,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=137, Invalid=169, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:41:17,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30959 states. [2021-08-06 19:41:17,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30959 to 30343. [2021-08-06 19:41:17,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30343 states, 30342 states have (on average 2.3285874365565884) internal successors, (70654), 30342 states have internal predecessors, (70654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:18,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30343 states to 30343 states and 70654 transitions. [2021-08-06 19:41:18,035 INFO L78 Accepts]: Start accepts. Automaton has 30343 states and 70654 transitions. Word has length 25 [2021-08-06 19:41:18,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:18,035 INFO L470 AbstractCegarLoop]: Abstraction has 30343 states and 70654 transitions. [2021-08-06 19:41:18,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:18,035 INFO L276 IsEmpty]: Start isEmpty. Operand 30343 states and 70654 transitions. [2021-08-06 19:41:18,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:41:18,063 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:18,063 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:41:18,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2021-08-06 19:41:18,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:18,287 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:41:18,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:18,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1883866551, now seen corresponding path program 163 times [2021-08-06 19:41:18,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:18,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570683118] [2021-08-06 19:41:18,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:18,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:18,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:18,545 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:18,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:18,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570683118] [2021-08-06 19:41:18,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570683118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:18,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110284647] [2021-08-06 19:41:18,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:41:18,546 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:18,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:41:18,546 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:41:18,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2021-08-06 19:41:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:19,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:41:19,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:41:19,986 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:41:19,987 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:41:20,001 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:20,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110284647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:20,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:41:20,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-06 19:41:20,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097010408] [2021-08-06 19:41:20,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:41:20,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:20,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:41:20,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:41:20,002 INFO L87 Difference]: Start difference. First operand 30343 states and 70654 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:20,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:20,174 INFO L93 Difference]: Finished difference Result 31718 states and 73282 transitions. [2021-08-06 19:41:20,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:41:20,175 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:41:20,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:20,229 INFO L225 Difference]: With dead ends: 31718 [2021-08-06 19:41:20,229 INFO L226 Difference]: Without dead ends: 31718 [2021-08-06 19:41:20,229 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 112.2ms TimeCoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:41:20,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31718 states. [2021-08-06 19:41:20,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31718 to 30287. [2021-08-06 19:41:20,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30287 states, 30286 states have (on average 2.327709172554976) internal successors, (70497), 30286 states have internal predecessors, (70497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:21,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30287 states to 30287 states and 70497 transitions. [2021-08-06 19:41:21,049 INFO L78 Accepts]: Start accepts. Automaton has 30287 states and 70497 transitions. Word has length 25 [2021-08-06 19:41:21,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:21,049 INFO L470 AbstractCegarLoop]: Abstraction has 30287 states and 70497 transitions. [2021-08-06 19:41:21,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:21,049 INFO L276 IsEmpty]: Start isEmpty. Operand 30287 states and 70497 transitions. [2021-08-06 19:41:21,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:41:21,074 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:21,074 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:41:21,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2021-08-06 19:41:21,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-08-06 19:41:21,294 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:41:21,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:21,294 INFO L82 PathProgramCache]: Analyzing trace with hash -537976145, now seen corresponding path program 164 times [2021-08-06 19:41:21,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:21,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754266140] [2021-08-06 19:41:21,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:21,295 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:21,417 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 34 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:21,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:21,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754266140] [2021-08-06 19:41:21,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754266140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:21,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634869248] [2021-08-06 19:41:21,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:41:21,418 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:21,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:41:21,419 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:41:21,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2021-08-06 19:41:22,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:41:22,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:41:22,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:41:22,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:41:22,977 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:41:22,978 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:41:22,994 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:41:22,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634869248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:22,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:41:22,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-06 19:41:22,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33322469] [2021-08-06 19:41:22,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:41:22,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:22,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:41:22,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=152, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:41:22,995 INFO L87 Difference]: Start difference. First operand 30287 states and 70497 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:23,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:23,241 INFO L93 Difference]: Finished difference Result 30436 states and 70685 transitions. [2021-08-06 19:41:23,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:41:23,241 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:41:23,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:23,293 INFO L225 Difference]: With dead ends: 30436 [2021-08-06 19:41:23,293 INFO L226 Difference]: Without dead ends: 30435 [2021-08-06 19:41:23,294 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 169.8ms TimeCoverageRelationStatistics Valid=328, Invalid=542, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:41:23,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30435 states. [2021-08-06 19:41:23,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30435 to 30303. [2021-08-06 19:41:23,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30303 states, 30302 states have (on average 2.3277671440828986) internal successors, (70536), 30302 states have internal predecessors, (70536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:23,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30303 states to 30303 states and 70536 transitions. [2021-08-06 19:41:23,891 INFO L78 Accepts]: Start accepts. Automaton has 30303 states and 70536 transitions. Word has length 25 [2021-08-06 19:41:23,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:23,891 INFO L470 AbstractCegarLoop]: Abstraction has 30303 states and 70536 transitions. [2021-08-06 19:41:23,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:23,891 INFO L276 IsEmpty]: Start isEmpty. Operand 30303 states and 70536 transitions. [2021-08-06 19:41:23,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:41:23,913 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:23,913 INFO L512 BasicCegarLoop]: trace histogram [13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:41:23,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2021-08-06 19:41:24,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-08-06 19:41:24,129 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:41:24,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:24,129 INFO L82 PathProgramCache]: Analyzing trace with hash 263640083, now seen corresponding path program 165 times [2021-08-06 19:41:24,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:24,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089340834] [2021-08-06 19:41:24,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:24,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:24,392 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 39 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:24,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:24,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089340834] [2021-08-06 19:41:24,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089340834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:24,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434428384] [2021-08-06 19:41:24,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:41:24,393 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:24,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:41:24,394 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:41:24,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2021-08-06 19:41:25,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 19:41:25,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:41:25,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:41:25,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:41:25,779 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:41:25,780 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:41:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 48 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:41:25,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434428384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:25,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:41:25,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-06 19:41:25,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403848779] [2021-08-06 19:41:25,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:41:25,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:25,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:41:25,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=160, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:41:25,792 INFO L87 Difference]: Start difference. First operand 30303 states and 70536 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:26,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:26,103 INFO L93 Difference]: Finished difference Result 30572 states and 71025 transitions. [2021-08-06 19:41:26,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:41:26,104 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:41:26,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:26,148 INFO L225 Difference]: With dead ends: 30572 [2021-08-06 19:41:26,148 INFO L226 Difference]: Without dead ends: 30572 [2021-08-06 19:41:26,148 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 291.4ms TimeCoverageRelationStatistics Valid=272, Invalid=430, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:41:26,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30572 states. [2021-08-06 19:41:26,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30572 to 30349. [2021-08-06 19:41:26,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30349 states, 30348 states have (on average 2.3287860814551204) internal successors, (70674), 30348 states have internal predecessors, (70674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:26,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30349 states to 30349 states and 70674 transitions. [2021-08-06 19:41:26,709 INFO L78 Accepts]: Start accepts. Automaton has 30349 states and 70674 transitions. Word has length 25 [2021-08-06 19:41:26,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:26,709 INFO L470 AbstractCegarLoop]: Abstraction has 30349 states and 70674 transitions. [2021-08-06 19:41:26,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:26,709 INFO L276 IsEmpty]: Start isEmpty. Operand 30349 states and 70674 transitions. [2021-08-06 19:41:26,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:41:26,731 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:26,731 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:41:26,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2021-08-06 19:41:26,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-08-06 19:41:26,951 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:41:26,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:26,951 INFO L82 PathProgramCache]: Analyzing trace with hash 2038647445, now seen corresponding path program 166 times [2021-08-06 19:41:26,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:26,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906070232] [2021-08-06 19:41:26,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:26,951 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:26,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:27,068 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 28 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:27,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:27,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906070232] [2021-08-06 19:41:27,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906070232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:27,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556449064] [2021-08-06 19:41:27,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:41:27,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:27,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:41:27,069 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:41:27,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2021-08-06 19:41:28,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:41:28,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:41:28,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:41:28,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:41:28,636 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:41:28,636 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:41:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 30 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:28,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556449064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:28,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:41:28,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-06 19:41:28,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979866005] [2021-08-06 19:41:28,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:41:28,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:28,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:41:28,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=152, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:41:28,653 INFO L87 Difference]: Start difference. First operand 30349 states and 70674 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:28,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:28,829 INFO L93 Difference]: Finished difference Result 31063 states and 71978 transitions. [2021-08-06 19:41:28,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:41:28,830 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:41:28,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:28,895 INFO L225 Difference]: With dead ends: 31063 [2021-08-06 19:41:28,895 INFO L226 Difference]: Without dead ends: 31063 [2021-08-06 19:41:28,895 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 85.2ms TimeCoverageRelationStatistics Valid=136, Invalid=170, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:41:28,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31063 states. [2021-08-06 19:41:29,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31063 to 30354. [2021-08-06 19:41:29,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30354 states, 30353 states have (on average 2.3287319210621686) internal successors, (70684), 30353 states have internal predecessors, (70684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:29,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30354 states to 30354 states and 70684 transitions. [2021-08-06 19:41:29,510 INFO L78 Accepts]: Start accepts. Automaton has 30354 states and 70684 transitions. Word has length 25 [2021-08-06 19:41:29,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:29,510 INFO L470 AbstractCegarLoop]: Abstraction has 30354 states and 70684 transitions. [2021-08-06 19:41:29,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:29,510 INFO L276 IsEmpty]: Start isEmpty. Operand 30354 states and 70684 transitions. [2021-08-06 19:41:29,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:41:29,535 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:29,535 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:41:29,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2021-08-06 19:41:29,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-08-06 19:41:29,760 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:41:29,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:29,760 INFO L82 PathProgramCache]: Analyzing trace with hash -545706543, now seen corresponding path program 167 times [2021-08-06 19:41:29,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:29,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987648411] [2021-08-06 19:41:29,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:29,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:29,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:29,967 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 19 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:29,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:29,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987648411] [2021-08-06 19:41:29,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987648411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:29,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459192999] [2021-08-06 19:41:29,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:41:29,968 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:29,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:41:29,969 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:41:29,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2021-08-06 19:41:31,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 19:41:31,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:41:31,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:41:31,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:41:31,188 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:41:31,188 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:41:31,202 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 20 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:31,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459192999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:31,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:41:31,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-06 19:41:31,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150757838] [2021-08-06 19:41:31,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:41:31,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:31,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:41:31,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:41:31,203 INFO L87 Difference]: Start difference. First operand 30354 states and 70684 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:31,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:31,376 INFO L93 Difference]: Finished difference Result 32010 states and 73865 transitions. [2021-08-06 19:41:31,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:41:31,376 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:41:31,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:31,433 INFO L225 Difference]: With dead ends: 32010 [2021-08-06 19:41:31,433 INFO L226 Difference]: Without dead ends: 32010 [2021-08-06 19:41:31,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:41:31,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32010 states. [2021-08-06 19:41:31,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32010 to 30312. [2021-08-06 19:41:31,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30312 states, 30311 states have (on average 2.327702814159876) internal successors, (70555), 30311 states have internal predecessors, (70555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:32,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30312 states to 30312 states and 70555 transitions. [2021-08-06 19:41:32,040 INFO L78 Accepts]: Start accepts. Automaton has 30312 states and 70555 transitions. Word has length 25 [2021-08-06 19:41:32,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:32,041 INFO L470 AbstractCegarLoop]: Abstraction has 30312 states and 70555 transitions. [2021-08-06 19:41:32,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:32,041 INFO L276 IsEmpty]: Start isEmpty. Operand 30312 states and 70555 transitions. [2021-08-06 19:41:32,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:41:32,063 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:32,063 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:41:32,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2021-08-06 19:41:32,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:32,283 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:41:32,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:32,283 INFO L82 PathProgramCache]: Analyzing trace with hash 943698453, now seen corresponding path program 168 times [2021-08-06 19:41:32,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:32,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959305048] [2021-08-06 19:41:32,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:32,283 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:32,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:32,428 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:32,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:32,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959305048] [2021-08-06 19:41:32,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959305048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:32,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738198517] [2021-08-06 19:41:32,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:41:32,429 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:32,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:41:32,430 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:41:32,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2021-08-06 19:41:33,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 19:41:33,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:41:33,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:41:33,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:41:33,941 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:41:33,942 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:41:33,956 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:33,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738198517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:33,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:41:33,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-06 19:41:33,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052432931] [2021-08-06 19:41:33,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:41:33,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:33,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:41:33,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:41:33,956 INFO L87 Difference]: Start difference. First operand 30312 states and 70555 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:34,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:34,287 INFO L93 Difference]: Finished difference Result 42451 states and 99305 transitions. [2021-08-06 19:41:34,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:41:34,287 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:41:34,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:34,372 INFO L225 Difference]: With dead ends: 42451 [2021-08-06 19:41:34,372 INFO L226 Difference]: Without dead ends: 42451 [2021-08-06 19:41:34,372 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 121.8ms TimeCoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:41:34,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42451 states. [2021-08-06 19:41:34,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42451 to 40464. [2021-08-06 19:41:35,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40464 states, 40463 states have (on average 2.3523218743049203) internal successors, (95182), 40463 states have internal predecessors, (95182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:35,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40464 states to 40464 states and 95182 transitions. [2021-08-06 19:41:35,108 INFO L78 Accepts]: Start accepts. Automaton has 40464 states and 95182 transitions. Word has length 25 [2021-08-06 19:41:35,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:35,108 INFO L470 AbstractCegarLoop]: Abstraction has 40464 states and 95182 transitions. [2021-08-06 19:41:35,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:35,108 INFO L276 IsEmpty]: Start isEmpty. Operand 40464 states and 95182 transitions. [2021-08-06 19:41:35,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:41:35,132 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:35,132 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:41:35,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2021-08-06 19:41:35,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:35,352 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:41:35,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:35,352 INFO L82 PathProgramCache]: Analyzing trace with hash -2004688857, now seen corresponding path program 169 times [2021-08-06 19:41:35,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:35,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274674007] [2021-08-06 19:41:35,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:35,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:35,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:35,468 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 39 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:35,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:35,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274674007] [2021-08-06 19:41:35,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274674007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:35,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604881544] [2021-08-06 19:41:35,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:41:35,468 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:35,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:41:35,469 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:41:35,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2021-08-06 19:41:36,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:36,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:41:36,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:41:36,992 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:41:36,993 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:41:37,008 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 42 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:41:37,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604881544] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:37,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:41:37,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-06 19:41:37,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499073671] [2021-08-06 19:41:37,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:41:37,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:37,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:41:37,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=153, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:41:37,009 INFO L87 Difference]: Start difference. First operand 40464 states and 95182 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:37,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:37,272 INFO L93 Difference]: Finished difference Result 40639 states and 95446 transitions. [2021-08-06 19:41:37,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:41:37,272 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:41:37,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:37,347 INFO L225 Difference]: With dead ends: 40639 [2021-08-06 19:41:37,347 INFO L226 Difference]: Without dead ends: 40638 [2021-08-06 19:41:37,347 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 160.3ms TimeCoverageRelationStatistics Valid=327, Invalid=543, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:41:37,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40638 states. [2021-08-06 19:41:38,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40638 to 40509. [2021-08-06 19:41:38,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40509 states, 40508 states have (on average 2.3524242125012345) internal successors, (95292), 40508 states have internal predecessors, (95292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:38,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40509 states to 40509 states and 95292 transitions. [2021-08-06 19:41:38,244 INFO L78 Accepts]: Start accepts. Automaton has 40509 states and 95292 transitions. Word has length 25 [2021-08-06 19:41:38,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:38,245 INFO L470 AbstractCegarLoop]: Abstraction has 40509 states and 95292 transitions. [2021-08-06 19:41:38,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:38,245 INFO L276 IsEmpty]: Start isEmpty. Operand 40509 states and 95292 transitions. [2021-08-06 19:41:38,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:41:38,271 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:38,271 INFO L512 BasicCegarLoop]: trace histogram [13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:41:38,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2021-08-06 19:41:38,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:38,477 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:41:38,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:38,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1203072629, now seen corresponding path program 170 times [2021-08-06 19:41:38,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:38,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172557880] [2021-08-06 19:41:38,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:38,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:38,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:38,568 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 34 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:38,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:38,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172557880] [2021-08-06 19:41:38,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172557880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:38,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042153052] [2021-08-06 19:41:38,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:41:38,568 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:38,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:41:38,569 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:41:38,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2021-08-06 19:41:40,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:41:40,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:41:40,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:41:40,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:41:40,184 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:41:40,185 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:41:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 42 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:41:40,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042153052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:40,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:41:40,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-06 19:41:40,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375737469] [2021-08-06 19:41:40,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:41:40,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:40,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:41:40,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=159, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:41:40,199 INFO L87 Difference]: Start difference. First operand 40509 states and 95292 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:40,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:40,508 INFO L93 Difference]: Finished difference Result 40817 states and 95890 transitions. [2021-08-06 19:41:40,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:41:40,509 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:41:40,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:40,589 INFO L225 Difference]: With dead ends: 40817 [2021-08-06 19:41:40,589 INFO L226 Difference]: Without dead ends: 40817 [2021-08-06 19:41:40,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 117.8ms TimeCoverageRelationStatistics Valid=257, Invalid=393, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:41:40,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40817 states. [2021-08-06 19:41:41,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40817 to 40578. [2021-08-06 19:41:41,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40578 states, 40577 states have (on average 2.3535253961603866) internal successors, (95499), 40577 states have internal predecessors, (95499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:41,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40578 states to 40578 states and 95499 transitions. [2021-08-06 19:41:41,402 INFO L78 Accepts]: Start accepts. Automaton has 40578 states and 95499 transitions. Word has length 25 [2021-08-06 19:41:41,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:41,402 INFO L470 AbstractCegarLoop]: Abstraction has 40578 states and 95499 transitions. [2021-08-06 19:41:41,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:41,402 INFO L276 IsEmpty]: Start isEmpty. Operand 40578 states and 95499 transitions. [2021-08-06 19:41:41,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:41:41,431 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:41,431 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:41:41,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2021-08-06 19:41:41,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:41,637 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:41:41,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:41,637 INFO L82 PathProgramCache]: Analyzing trace with hash 571934733, now seen corresponding path program 171 times [2021-08-06 19:41:41,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:41,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045633538] [2021-08-06 19:41:41,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:41,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 34 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:41,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:41,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045633538] [2021-08-06 19:41:41,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045633538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:41,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248126112] [2021-08-06 19:41:41,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:41:41,930 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:41,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:41:41,931 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:41:41,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2021-08-06 19:41:43,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 19:41:43,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:41:43,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:41:43,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:41:43,452 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:41:43,453 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:41:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 37 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:43,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248126112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:43,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:41:43,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-06 19:41:43,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793296262] [2021-08-06 19:41:43,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:41:43,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:43,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:41:43,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=153, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:41:43,469 INFO L87 Difference]: Start difference. First operand 40578 states and 95499 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:43,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:43,671 INFO L93 Difference]: Finished difference Result 41410 states and 97016 transitions. [2021-08-06 19:41:43,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:41:43,672 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:41:43,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:43,795 INFO L225 Difference]: With dead ends: 41410 [2021-08-06 19:41:43,795 INFO L226 Difference]: Without dead ends: 41410 [2021-08-06 19:41:43,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=135, Invalid=171, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:41:43,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41410 states. [2021-08-06 19:41:44,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41410 to 40588. [2021-08-06 19:41:44,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40588 states, 40587 states have (on average 2.3528223322738806) internal successors, (95494), 40587 states have internal predecessors, (95494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:44,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40588 states to 40588 states and 95494 transitions. [2021-08-06 19:41:44,549 INFO L78 Accepts]: Start accepts. Automaton has 40588 states and 95494 transitions. Word has length 25 [2021-08-06 19:41:44,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:44,549 INFO L470 AbstractCegarLoop]: Abstraction has 40588 states and 95494 transitions. [2021-08-06 19:41:44,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:44,549 INFO L276 IsEmpty]: Start isEmpty. Operand 40588 states and 95494 transitions. [2021-08-06 19:41:44,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:41:44,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:44,573 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:41:44,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2021-08-06 19:41:44,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:44,783 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:41:44,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:44,783 INFO L82 PathProgramCache]: Analyzing trace with hash -2012419255, now seen corresponding path program 172 times [2021-08-06 19:41:44,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:44,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726974545] [2021-08-06 19:41:44,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:44,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:44,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 26 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:44,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:44,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726974545] [2021-08-06 19:41:44,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726974545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:44,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845109589] [2021-08-06 19:41:44,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:41:44,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:44,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:41:44,912 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:41:44,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2021-08-06 19:41:46,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:41:46,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:41:46,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:41:46,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:41:46,587 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:41:46,587 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:41:46,601 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 28 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:46,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845109589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:46,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:41:46,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-06 19:41:46,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895557281] [2021-08-06 19:41:46,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:41:46,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:46,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:41:46,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:41:46,602 INFO L87 Difference]: Start difference. First operand 40588 states and 95494 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:46,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:46,819 INFO L93 Difference]: Finished difference Result 42589 states and 99367 transitions. [2021-08-06 19:41:46,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:41:46,819 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:41:46,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:46,901 INFO L225 Difference]: With dead ends: 42589 [2021-08-06 19:41:46,901 INFO L226 Difference]: Without dead ends: 42589 [2021-08-06 19:41:46,901 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=173, Invalid=247, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:41:46,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42589 states. [2021-08-06 19:41:47,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42589 to 40491. [2021-08-06 19:41:47,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40491 states, 40490 states have (on average 2.351568288466288) internal successors, (95215), 40490 states have internal predecessors, (95215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:47,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40491 states to 40491 states and 95215 transitions. [2021-08-06 19:41:47,753 INFO L78 Accepts]: Start accepts. Automaton has 40491 states and 95215 transitions. Word has length 25 [2021-08-06 19:41:47,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:47,753 INFO L470 AbstractCegarLoop]: Abstraction has 40491 states and 95215 transitions. [2021-08-06 19:41:47,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:47,753 INFO L276 IsEmpty]: Start isEmpty. Operand 40491 states and 95215 transitions. [2021-08-06 19:41:47,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:41:47,777 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:47,777 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:41:47,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2021-08-06 19:41:47,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:47,996 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:41:47,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:47,996 INFO L82 PathProgramCache]: Analyzing trace with hash -523014259, now seen corresponding path program 173 times [2021-08-06 19:41:47,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:47,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700905394] [2021-08-06 19:41:47,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:47,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:48,117 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 18 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:48,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:48,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700905394] [2021-08-06 19:41:48,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700905394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:48,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276762644] [2021-08-06 19:41:48,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:41:48,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:48,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:41:48,118 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:41:48,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2021-08-06 19:41:49,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 19:41:49,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:41:49,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:41:49,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:41:49,742 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:41:49,743 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:41:49,756 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 19 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:49,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276762644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:49,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:41:49,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-06 19:41:49,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181863299] [2021-08-06 19:41:49,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:41:49,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:49,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:41:49,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:41:49,757 INFO L87 Difference]: Start difference. First operand 40491 states and 95215 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:50,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:50,047 INFO L93 Difference]: Finished difference Result 60841 states and 143593 transitions. [2021-08-06 19:41:50,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:41:50,047 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:41:50,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:50,190 INFO L225 Difference]: With dead ends: 60841 [2021-08-06 19:41:50,190 INFO L226 Difference]: Without dead ends: 60841 [2021-08-06 19:41:50,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 108.1ms TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:41:50,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60841 states. [2021-08-06 19:41:51,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60841 to 58683. [2021-08-06 19:41:51,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58683 states, 58682 states have (on average 2.3700112470604275) internal successors, (139077), 58682 states have internal predecessors, (139077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:51,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58683 states to 58683 states and 139077 transitions. [2021-08-06 19:41:51,670 INFO L78 Accepts]: Start accepts. Automaton has 58683 states and 139077 transitions. Word has length 25 [2021-08-06 19:41:51,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:51,671 INFO L470 AbstractCegarLoop]: Abstraction has 58683 states and 139077 transitions. [2021-08-06 19:41:51,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:51,671 INFO L276 IsEmpty]: Start isEmpty. Operand 58683 states and 139077 transitions. [2021-08-06 19:41:51,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:41:51,698 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:51,698 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:41:51,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2021-08-06 19:41:51,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-08-06 19:41:51,918 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:41:51,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:51,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1596099639, now seen corresponding path program 174 times [2021-08-06 19:41:51,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:51,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603239575] [2021-08-06 19:41:51,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:51,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:51,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:52,066 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:52,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:52,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603239575] [2021-08-06 19:41:52,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603239575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:52,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453994689] [2021-08-06 19:41:52,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:41:52,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:52,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:41:52,068 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:41:52,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2021-08-06 19:41:53,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 19:41:53,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:41:53,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:41:53,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:41:53,779 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:41:53,780 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:41:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:53,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453994689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:53,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:41:53,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-06 19:41:53,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050931780] [2021-08-06 19:41:53,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:41:53,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:53,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:41:53,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:41:53,795 INFO L87 Difference]: Start difference. First operand 58683 states and 139077 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:54,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:54,174 INFO L93 Difference]: Finished difference Result 72653 states and 173073 transitions. [2021-08-06 19:41:54,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 19:41:54,174 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:41:54,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:54,354 INFO L225 Difference]: With dead ends: 72653 [2021-08-06 19:41:54,354 INFO L226 Difference]: Without dead ends: 72653 [2021-08-06 19:41:54,355 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 174.5ms TimeCoverageRelationStatistics Valid=284, Invalid=472, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:41:54,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72653 states. [2021-08-06 19:41:55,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72653 to 68749. [2021-08-06 19:41:55,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68749 states, 68748 states have (on average 2.388811310874498) internal successors, (164226), 68748 states have internal predecessors, (164226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:56,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68749 states to 68749 states and 164226 transitions. [2021-08-06 19:41:56,069 INFO L78 Accepts]: Start accepts. Automaton has 68749 states and 164226 transitions. Word has length 25 [2021-08-06 19:41:56,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:56,069 INFO L470 AbstractCegarLoop]: Abstraction has 68749 states and 164226 transitions. [2021-08-06 19:41:56,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:56,070 INFO L276 IsEmpty]: Start isEmpty. Operand 68749 states and 164226 transitions. [2021-08-06 19:41:56,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:41:56,106 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:56,106 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:41:56,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2021-08-06 19:41:56,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-08-06 19:41:56,327 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:41:56,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:56,328 INFO L82 PathProgramCache]: Analyzing trace with hash -228142673, now seen corresponding path program 175 times [2021-08-06 19:41:56,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:56,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231695872] [2021-08-06 19:41:56,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:56,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:56,443 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 42 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:56,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:56,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231695872] [2021-08-06 19:41:56,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231695872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:56,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826333099] [2021-08-06 19:41:56,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:41:56,444 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:56,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:41:56,445 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:41:56,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2021-08-06 19:41:58,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:58,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:41:58,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:41:58,165 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:41:58,166 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:41:58,181 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 46 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:41:58,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826333099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:58,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:41:58,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-06 19:41:58,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034915117] [2021-08-06 19:41:58,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:41:58,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:58,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:41:58,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=154, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:41:58,182 INFO L87 Difference]: Start difference. First operand 68749 states and 164226 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:58,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:58,586 INFO L93 Difference]: Finished difference Result 69048 states and 164837 transitions. [2021-08-06 19:41:58,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:41:58,586 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:41:58,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:58,742 INFO L225 Difference]: With dead ends: 69048 [2021-08-06 19:41:58,742 INFO L226 Difference]: Without dead ends: 69047 [2021-08-06 19:41:58,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 159.5ms TimeCoverageRelationStatistics Valid=326, Invalid=544, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:41:58,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69047 states. [2021-08-06 19:41:59,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69047 to 68921. [2021-08-06 19:42:00,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68921 states, 68920 states have (on average 2.3889291932675567) internal successors, (164645), 68920 states have internal predecessors, (164645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:00,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68921 states to 68921 states and 164645 transitions. [2021-08-06 19:42:00,221 INFO L78 Accepts]: Start accepts. Automaton has 68921 states and 164645 transitions. Word has length 25 [2021-08-06 19:42:00,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:00,222 INFO L470 AbstractCegarLoop]: Abstraction has 68921 states and 164645 transitions. [2021-08-06 19:42:00,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:00,222 INFO L276 IsEmpty]: Start isEmpty. Operand 68921 states and 164645 transitions. [2021-08-06 19:42:00,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:42:00,256 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:00,256 INFO L512 BasicCegarLoop]: trace histogram [13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:00,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2021-08-06 19:42:00,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-08-06 19:42:00,476 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:42:00,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:00,477 INFO L82 PathProgramCache]: Analyzing trace with hash 573473555, now seen corresponding path program 176 times [2021-08-06 19:42:00,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:00,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072422862] [2021-08-06 19:42:00,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:00,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:00,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:00,979 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 31 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:00,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:00,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072422862] [2021-08-06 19:42:00,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072422862] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:00,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394321864] [2021-08-06 19:42:00,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:42:00,979 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:00,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:00,980 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:42:00,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2021-08-06 19:42:02,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:42:02,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:02,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:42:02,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:02,546 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:42:02,546 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:42:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 38 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:42:02,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394321864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:02,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:02,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-06 19:42:02,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876634818] [2021-08-06 19:42:02,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:42:02,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:02,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:42:02,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=158, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:42:02,557 INFO L87 Difference]: Start difference. First operand 68921 states and 164645 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:02,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:02,875 INFO L93 Difference]: Finished difference Result 69292 states and 165430 transitions. [2021-08-06 19:42:02,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:42:02,876 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:42:02,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:03,040 INFO L225 Difference]: With dead ends: 69292 [2021-08-06 19:42:03,040 INFO L226 Difference]: Without dead ends: 69292 [2021-08-06 19:42:03,041 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 501.9ms TimeCoverageRelationStatistics Valid=242, Invalid=358, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:42:03,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69292 states. [2021-08-06 19:42:04,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69292 to 69027. [2021-08-06 19:42:04,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69027 states, 69026 states have (on average 2.3898820734216093) internal successors, (164964), 69026 states have internal predecessors, (164964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:04,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69027 states to 69027 states and 164964 transitions. [2021-08-06 19:42:04,433 INFO L78 Accepts]: Start accepts. Automaton has 69027 states and 164964 transitions. Word has length 25 [2021-08-06 19:42:04,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:04,433 INFO L470 AbstractCegarLoop]: Abstraction has 69027 states and 164964 transitions. [2021-08-06 19:42:04,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:04,433 INFO L276 IsEmpty]: Start isEmpty. Operand 69027 states and 164964 transitions. [2021-08-06 19:42:04,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:42:04,468 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:04,468 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:04,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2021-08-06 19:42:04,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:04,671 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:42:04,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:04,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1946486379, now seen corresponding path program 177 times [2021-08-06 19:42:04,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:04,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497698002] [2021-08-06 19:42:04,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:04,672 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:04,779 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 37 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:42:04,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:04,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497698002] [2021-08-06 19:42:04,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497698002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:04,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546091702] [2021-08-06 19:42:04,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:42:04,779 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:04,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:04,780 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:42:04,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2021-08-06 19:42:06,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 19:42:06,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:06,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:42:06,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:06,574 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:42:06,575 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:42:06,588 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 41 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:42:06,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546091702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:06,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:06,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-06 19:42:06,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222585930] [2021-08-06 19:42:06,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:42:06,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:06,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:42:06,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=154, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:42:06,589 INFO L87 Difference]: Start difference. First operand 69027 states and 164964 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:06,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:06,917 INFO L93 Difference]: Finished difference Result 69147 states and 164936 transitions. [2021-08-06 19:42:06,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:42:06,918 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:42:06,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:07,107 INFO L225 Difference]: With dead ends: 69147 [2021-08-06 19:42:07,107 INFO L226 Difference]: Without dead ends: 69147 [2021-08-06 19:42:07,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=134, Invalid=172, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:42:07,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69147 states. [2021-08-06 19:42:08,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69147 to 68911. [2021-08-06 19:42:08,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68911 states, 68910 states have (on average 2.388289072703526) internal successors, (164577), 68910 states have internal predecessors, (164577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:08,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68911 states to 68911 states and 164577 transitions. [2021-08-06 19:42:08,768 INFO L78 Accepts]: Start accepts. Automaton has 68911 states and 164577 transitions. Word has length 25 [2021-08-06 19:42:08,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:08,768 INFO L470 AbstractCegarLoop]: Abstraction has 68911 states and 164577 transitions. [2021-08-06 19:42:08,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:08,768 INFO L276 IsEmpty]: Start isEmpty. Operand 68911 states and 164577 transitions. [2021-08-06 19:42:08,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:42:08,803 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:08,803 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:08,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2021-08-06 19:42:09,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:09,024 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:42:09,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:09,024 INFO L82 PathProgramCache]: Analyzing trace with hash -235873071, now seen corresponding path program 178 times [2021-08-06 19:42:09,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:09,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562058290] [2021-08-06 19:42:09,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:09,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:09,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:09,136 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 31 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:09,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:09,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562058290] [2021-08-06 19:42:09,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562058290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:09,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960031177] [2021-08-06 19:42:09,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:42:09,137 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:09,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:09,137 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:42:09,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2021-08-06 19:42:10,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:42:10,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:10,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:42:10,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:11,013 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:42:11,013 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:42:11,027 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 34 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:11,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960031177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:11,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:11,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-08-06 19:42:11,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033427542] [2021-08-06 19:42:11,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:42:11,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:11,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:42:11,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=185, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:42:11,028 INFO L87 Difference]: Start difference. First operand 68911 states and 164577 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:11,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:11,360 INFO L93 Difference]: Finished difference Result 72106 states and 170809 transitions. [2021-08-06 19:42:11,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:42:11,361 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:42:11,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:11,536 INFO L225 Difference]: With dead ends: 72106 [2021-08-06 19:42:11,536 INFO L226 Difference]: Without dead ends: 72106 [2021-08-06 19:42:11,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=172, Invalid=248, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:42:11,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72106 states. [2021-08-06 19:42:12,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72106 to 69030. [2021-08-06 19:42:13,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69030 states, 69029 states have (on average 2.387069202798824) internal successors, (164777), 69029 states have internal predecessors, (164777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:13,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69030 states to 69030 states and 164777 transitions. [2021-08-06 19:42:13,203 INFO L78 Accepts]: Start accepts. Automaton has 69030 states and 164777 transitions. Word has length 25 [2021-08-06 19:42:13,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:13,203 INFO L470 AbstractCegarLoop]: Abstraction has 69030 states and 164777 transitions. [2021-08-06 19:42:13,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:13,203 INFO L276 IsEmpty]: Start isEmpty. Operand 69030 states and 164777 transitions. [2021-08-06 19:42:13,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:42:13,240 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:13,240 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:13,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2021-08-06 19:42:13,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:13,460 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:42:13,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:13,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1253531925, now seen corresponding path program 179 times [2021-08-06 19:42:13,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:13,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733622446] [2021-08-06 19:42:13,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:13,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:13,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:13,580 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 24 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:13,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:13,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733622446] [2021-08-06 19:42:13,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733622446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:13,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065295679] [2021-08-06 19:42:13,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:42:13,581 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:13,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:13,582 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:42:13,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2021-08-06 19:42:15,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 19:42:15,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:15,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:42:15,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:15,387 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:42:15,387 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:42:15,403 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 26 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:15,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065295679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:15,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:15,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-08-06 19:42:15,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351105884] [2021-08-06 19:42:15,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:42:15,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:15,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:42:15,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:42:15,404 INFO L87 Difference]: Start difference. First operand 69030 states and 164777 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:15,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:15,887 INFO L93 Difference]: Finished difference Result 108881 states and 261310 transitions. [2021-08-06 19:42:15,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:42:15,887 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:42:15,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:16,204 INFO L225 Difference]: With dead ends: 108881 [2021-08-06 19:42:16,204 INFO L226 Difference]: Without dead ends: 108881 [2021-08-06 19:42:16,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:42:16,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108881 states. [2021-08-06 19:42:18,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108881 to 106540. [2021-08-06 19:42:18,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106540 states, 106539 states have (on average 2.4061798965636996) internal successors, (256352), 106539 states have internal predecessors, (256352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:18,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106540 states to 106540 states and 256352 transitions. [2021-08-06 19:42:18,787 INFO L78 Accepts]: Start accepts. Automaton has 106540 states and 256352 transitions. Word has length 25 [2021-08-06 19:42:18,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:18,787 INFO L470 AbstractCegarLoop]: Abstraction has 106540 states and 256352 transitions. [2021-08-06 19:42:18,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:18,787 INFO L276 IsEmpty]: Start isEmpty. Operand 106540 states and 256352 transitions. [2021-08-06 19:42:18,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:42:18,827 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:18,827 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:18,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2021-08-06 19:42:19,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:19,046 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:42:19,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:19,047 INFO L82 PathProgramCache]: Analyzing trace with hash 180446545, now seen corresponding path program 180 times [2021-08-06 19:42:19,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:19,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140676995] [2021-08-06 19:42:19,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:19,047 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:19,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:19,166 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 17 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:19,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:19,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140676995] [2021-08-06 19:42:19,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140676995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:19,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395663228] [2021-08-06 19:42:19,167 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:42:19,167 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:19,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:19,168 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:42:19,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2021-08-06 19:42:20,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 19:42:20,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:20,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:42:20,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:20,989 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:42:20,989 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:42:21,003 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 18 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:21,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395663228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:21,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:21,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-08-06 19:42:21,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269878623] [2021-08-06 19:42:21,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:42:21,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:21,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:42:21,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:42:21,004 INFO L87 Difference]: Start difference. First operand 106540 states and 256352 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:21,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:21,615 INFO L93 Difference]: Finished difference Result 130189 states and 315283 transitions. [2021-08-06 19:42:21,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:42:21,615 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:42:21,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:22,166 INFO L225 Difference]: With dead ends: 130189 [2021-08-06 19:42:22,166 INFO L226 Difference]: Without dead ends: 130189 [2021-08-06 19:42:22,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 128.2ms TimeCoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:42:22,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130189 states. [2021-08-06 19:42:24,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130189 to 128471. [2021-08-06 19:42:24,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128471 states, 128470 states have (on average 2.4253366544718613) internal successors, (311583), 128470 states have internal predecessors, (311583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:24,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128471 states to 128471 states and 311583 transitions. [2021-08-06 19:42:24,973 INFO L78 Accepts]: Start accepts. Automaton has 128471 states and 311583 transitions. Word has length 25 [2021-08-06 19:42:24,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:24,973 INFO L470 AbstractCegarLoop]: Abstraction has 128471 states and 311583 transitions. [2021-08-06 19:42:24,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:24,973 INFO L276 IsEmpty]: Start isEmpty. Operand 128471 states and 311583 transitions. [2021-08-06 19:42:25,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:42:25,017 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:25,017 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:25,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2021-08-06 19:42:25,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-08-06 19:42:25,237 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:42:25,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:25,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1274538133, now seen corresponding path program 181 times [2021-08-06 19:42:25,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:25,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107888139] [2021-08-06 19:42:25,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:25,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:25,377 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:25,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:25,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107888139] [2021-08-06 19:42:25,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107888139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:25,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159190221] [2021-08-06 19:42:25,378 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:42:25,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:25,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:25,379 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:42:25,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2021-08-06 19:42:27,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:27,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:42:27,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:27,274 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:42:27,275 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:42:27,289 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:27,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159190221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:27,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:27,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-08-06 19:42:27,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051534989] [2021-08-06 19:42:27,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:42:27,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:27,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:42:27,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:42:27,290 INFO L87 Difference]: Start difference. First operand 128471 states and 311583 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:28,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:28,278 INFO L93 Difference]: Finished difference Result 144968 states and 352624 transitions. [2021-08-06 19:42:28,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 19:42:28,279 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:42:28,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:28,703 INFO L225 Difference]: With dead ends: 144968 [2021-08-06 19:42:28,704 INFO L226 Difference]: Without dead ends: 144968 [2021-08-06 19:42:28,704 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 193.4ms TimeCoverageRelationStatistics Valid=382, Invalid=674, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 19:42:28,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144968 states. [2021-08-06 19:42:31,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144968 to 141484. [2021-08-06 19:42:31,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141484 states, 141483 states have (on average 2.4414876698967367) internal successors, (345429), 141483 states have internal predecessors, (345429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:32,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141484 states to 141484 states and 345429 transitions. [2021-08-06 19:42:32,378 INFO L78 Accepts]: Start accepts. Automaton has 141484 states and 345429 transitions. Word has length 25 [2021-08-06 19:42:32,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:32,378 INFO L470 AbstractCegarLoop]: Abstraction has 141484 states and 345429 transitions. [2021-08-06 19:42:32,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:32,378 INFO L276 IsEmpty]: Start isEmpty. Operand 141484 states and 345429 transitions. [2021-08-06 19:42:32,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:42:32,426 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:32,426 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:32,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Forceful destruction successful, exit code 0 [2021-08-06 19:42:32,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:32,645 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:42:32,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:32,645 INFO L82 PathProgramCache]: Analyzing trace with hash 516720905, now seen corresponding path program 182 times [2021-08-06 19:42:32,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:32,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341854984] [2021-08-06 19:42:32,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:32,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:32,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 19:42:32,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:32,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341854984] [2021-08-06 19:42:32,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341854984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:32,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889868635] [2021-08-06 19:42:32,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:42:32,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:32,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:32,738 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:42:32,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2021-08-06 19:42:34,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:42:34,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:34,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:42:34,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:34,902 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:42:34,903 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:42:34,917 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 33 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 19:42:34,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889868635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:34,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:34,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 19:42:34,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479755557] [2021-08-06 19:42:34,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:42:34,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:34,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:42:34,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:42:34,917 INFO L87 Difference]: Start difference. First operand 141484 states and 345429 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:35,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:35,601 INFO L93 Difference]: Finished difference Result 142979 states and 349470 transitions. [2021-08-06 19:42:35,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:42:35,602 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 25 [2021-08-06 19:42:35,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:36,321 INFO L225 Difference]: With dead ends: 142979 [2021-08-06 19:42:36,322 INFO L226 Difference]: Without dead ends: 142977 [2021-08-06 19:42:36,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 130.0ms TimeCoverageRelationStatistics Valid=245, Invalid=457, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:42:36,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142977 states. [2021-08-06 19:42:38,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142977 to 142887. [2021-08-06 19:42:39,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142887 states, 142886 states have (on average 2.4451030891759866) internal successors, (349371), 142886 states have internal predecessors, (349371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:39,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142887 states to 142887 states and 349371 transitions. [2021-08-06 19:42:39,817 INFO L78 Accepts]: Start accepts. Automaton has 142887 states and 349371 transitions. Word has length 25 [2021-08-06 19:42:39,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:39,817 INFO L470 AbstractCegarLoop]: Abstraction has 142887 states and 349371 transitions. [2021-08-06 19:42:39,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:39,817 INFO L276 IsEmpty]: Start isEmpty. Operand 142887 states and 349371 transitions. [2021-08-06 19:42:39,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:42:39,871 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:39,871 INFO L512 BasicCegarLoop]: trace histogram [13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:39,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2021-08-06 19:42:40,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:40,089 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:42:40,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:40,089 INFO L82 PathProgramCache]: Analyzing trace with hash -402979803, now seen corresponding path program 183 times [2021-08-06 19:42:40,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:40,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597673345] [2021-08-06 19:42:40,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:40,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:40,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:40,185 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 36 proven. 57 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 19:42:40,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:40,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597673345] [2021-08-06 19:42:40,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597673345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:40,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541558698] [2021-08-06 19:42:40,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:42:40,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:40,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:40,186 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:42:40,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2021-08-06 19:42:41,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 19:42:41,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:41,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 19:42:41,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 4 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:42:42,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541558698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:42,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:42,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 27 [2021-08-06 19:42:42,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561862795] [2021-08-06 19:42:42,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 19:42:42,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:42,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 19:42:42,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:42:42,197 INFO L87 Difference]: Start difference. First operand 142887 states and 349371 transitions. Second operand has 28 states, 28 states have (on average 1.5) 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) [2021-08-06 19:42:44,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:44,184 INFO L93 Difference]: Finished difference Result 161292 states and 386805 transitions. [2021-08-06 19:42:44,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-08-06 19:42:44,184 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) 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) Word has length 25 [2021-08-06 19:42:44,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:44,829 INFO L225 Difference]: With dead ends: 161292 [2021-08-06 19:42:44,829 INFO L226 Difference]: Without dead ends: 161292 [2021-08-06 19:42:44,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3265 ImplicationChecksByTransitivity, 1306.4ms TimeCoverageRelationStatistics Valid=1319, Invalid=8983, Unknown=0, NotChecked=0, Total=10302 [2021-08-06 19:42:44,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161292 states. [2021-08-06 19:42:48,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161292 to 148620. [2021-08-06 19:42:48,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148620 states, 148619 states have (on average 2.432192384553792) internal successors, (361470), 148619 states have internal predecessors, (361470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:48,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148620 states to 148620 states and 361470 transitions. [2021-08-06 19:42:48,939 INFO L78 Accepts]: Start accepts. Automaton has 148620 states and 361470 transitions. Word has length 25 [2021-08-06 19:42:48,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:48,939 INFO L470 AbstractCegarLoop]: Abstraction has 148620 states and 361470 transitions. [2021-08-06 19:42:48,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) 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) [2021-08-06 19:42:48,939 INFO L276 IsEmpty]: Start isEmpty. Operand 148620 states and 361470 transitions. [2021-08-06 19:42:48,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:42:48,996 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:48,996 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:49,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2021-08-06 19:42:49,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:49,216 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:42:49,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:49,216 INFO L82 PathProgramCache]: Analyzing trace with hash 685667785, now seen corresponding path program 184 times [2021-08-06 19:42:49,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:49,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052788135] [2021-08-06 19:42:49,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:49,216 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:49,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:49,327 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 27 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:42:49,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:49,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052788135] [2021-08-06 19:42:49,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052788135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:49,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362110594] [2021-08-06 19:42:49,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:42:49,327 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:49,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:49,328 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:42:49,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2021-08-06 19:42:51,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:42:51,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:51,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:42:51,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:51,340 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:42:51,340 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:42:51,354 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:42:51,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362110594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:51,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:51,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-06 19:42:51,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707704536] [2021-08-06 19:42:51,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:42:51,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:51,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:42:51,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:42:51,355 INFO L87 Difference]: Start difference. First operand 148620 states and 361470 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:52,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:52,259 INFO L93 Difference]: Finished difference Result 158315 states and 385706 transitions. [2021-08-06 19:42:52,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:42:52,260 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:42:52,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:52,710 INFO L225 Difference]: With dead ends: 158315 [2021-08-06 19:42:52,711 INFO L226 Difference]: Without dead ends: 158315 [2021-08-06 19:42:52,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:42:52,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158315 states. [2021-08-06 19:42:56,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158315 to 154599. [2021-08-06 19:42:56,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154599 states, 154598 states have (on average 2.447470213068733) internal successors, (378374), 154598 states have internal predecessors, (378374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:57,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154599 states to 154599 states and 378374 transitions. [2021-08-06 19:42:57,048 INFO L78 Accepts]: Start accepts. Automaton has 154599 states and 378374 transitions. Word has length 25 [2021-08-06 19:42:57,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:57,048 INFO L470 AbstractCegarLoop]: Abstraction has 154599 states and 378374 transitions. [2021-08-06 19:42:57,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:57,048 INFO L276 IsEmpty]: Start isEmpty. Operand 154599 states and 378374 transitions. [2021-08-06 19:42:57,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:42:57,108 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:57,108 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:57,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2021-08-06 19:42:57,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:57,329 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:42:57,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:57,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1779759373, now seen corresponding path program 185 times [2021-08-06 19:42:57,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:57,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495993427] [2021-08-06 19:42:57,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:57,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:57,439 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 30 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:57,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:57,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495993427] [2021-08-06 19:42:57,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495993427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:57,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382390096] [2021-08-06 19:42:57,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:42:57,440 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:57,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:57,441 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:42:57,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2021-08-06 19:42:59,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 19:42:59,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:59,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:42:59,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:59,500 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:42:59,500 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:42:59,514 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 32 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:42:59,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382390096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:59,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:59,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-06 19:42:59,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196522972] [2021-08-06 19:42:59,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:42:59,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:59,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:42:59,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:42:59,514 INFO L87 Difference]: Start difference. First operand 154599 states and 378374 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:00,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:43:00,603 INFO L93 Difference]: Finished difference Result 164321 states and 400039 transitions. [2021-08-06 19:43:00,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:43:00,604 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 25 [2021-08-06 19:43:00,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:43:01,101 INFO L225 Difference]: With dead ends: 164321 [2021-08-06 19:43:01,102 INFO L226 Difference]: Without dead ends: 164321 [2021-08-06 19:43:01,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 100.3ms TimeCoverageRelationStatistics Valid=195, Invalid=311, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:43:01,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164321 states. [2021-08-06 19:43:04,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164321 to 151789. [2021-08-06 19:43:05,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151789 states, 151788 states have (on average 2.439698790418215) internal successors, (370317), 151788 states have internal predecessors, (370317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:06,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151789 states to 151789 states and 370317 transitions. [2021-08-06 19:43:06,526 INFO L78 Accepts]: Start accepts. Automaton has 151789 states and 370317 transitions. Word has length 25 [2021-08-06 19:43:06,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:43:06,527 INFO L470 AbstractCegarLoop]: Abstraction has 151789 states and 370317 transitions. [2021-08-06 19:43:06,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:06,527 INFO L276 IsEmpty]: Start isEmpty. Operand 151789 states and 370317 transitions. [2021-08-06 19:43:06,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:43:06,581 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:43:06,581 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:43:06,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2021-08-06 19:43:06,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:06,803 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:43:06,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:43:06,803 INFO L82 PathProgramCache]: Analyzing trace with hash 706673993, now seen corresponding path program 186 times [2021-08-06 19:43:06,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:43:06,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97283496] [2021-08-06 19:43:06,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:43:06,803 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:43:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:43:06,933 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 22 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:06,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:43:06,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97283496] [2021-08-06 19:43:06,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97283496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:06,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219640731] [2021-08-06 19:43:06,934 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:43:06,934 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:06,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:43:06,935 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:43:06,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2021-08-06 19:43:08,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 19:43:08,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:43:08,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:43:08,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:43:08,668 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:43:08,669 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:43:08,685 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 23 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:43:08,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219640731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:08,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:43:08,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-06 19:43:08,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315377028] [2021-08-06 19:43:08,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:43:08,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:43:08,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:43:08,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:43:08,686 INFO L87 Difference]: Start difference. First operand 151789 states and 370317 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:09,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:43:09,607 INFO L93 Difference]: Finished difference Result 161450 states and 394112 transitions. [2021-08-06 19:43:09,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:43:09,607 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 25 [2021-08-06 19:43:09,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:43:10,105 INFO L225 Difference]: With dead ends: 161450 [2021-08-06 19:43:10,105 INFO L226 Difference]: Without dead ends: 161450 [2021-08-06 19:43:10,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 163.1ms TimeCoverageRelationStatistics Valid=260, Invalid=442, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:43:10,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161450 states. [2021-08-06 19:43:14,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161450 to 157418. [2021-08-06 19:43:14,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157418 states, 157417 states have (on average 2.453032391673072) internal successors, (386149), 157417 states have internal predecessors, (386149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:15,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157418 states to 157418 states and 386149 transitions. [2021-08-06 19:43:15,172 INFO L78 Accepts]: Start accepts. Automaton has 157418 states and 386149 transitions. Word has length 25 [2021-08-06 19:43:15,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:43:15,172 INFO L470 AbstractCegarLoop]: Abstraction has 157418 states and 386149 transitions. [2021-08-06 19:43:15,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:15,172 INFO L276 IsEmpty]: Start isEmpty. Operand 157418 states and 386149 transitions. [2021-08-06 19:43:15,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:43:15,667 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:43:15,667 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:43:15,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2021-08-06 19:43:15,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-08-06 19:43:15,887 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:43:15,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:43:15,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1336860233, now seen corresponding path program 187 times [2021-08-06 19:43:15,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:43:15,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984983890] [2021-08-06 19:43:15,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:43:15,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:43:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:43:15,993 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 30 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:15,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:43:15,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984983890] [2021-08-06 19:43:15,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984983890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:15,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208595962] [2021-08-06 19:43:15,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:43:15,993 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:15,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:43:15,994 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:43:15,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2021-08-06 19:43:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:43:17,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:43:17,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:43:17,835 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:43:17,836 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:43:17,853 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 33 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:17,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208595962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:17,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:43:17,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-08-06 19:43:17,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704566010] [2021-08-06 19:43:17,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:43:17,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:43:17,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:43:17,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:43:17,854 INFO L87 Difference]: Start difference. First operand 157418 states and 386149 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:18,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:43:18,720 INFO L93 Difference]: Finished difference Result 167157 states and 405634 transitions. [2021-08-06 19:43:18,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:43:18,721 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:43:18,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:43:19,222 INFO L225 Difference]: With dead ends: 167157 [2021-08-06 19:43:19,222 INFO L226 Difference]: Without dead ends: 167157 [2021-08-06 19:43:19,222 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=214, Invalid=338, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:43:19,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167157 states. [2021-08-06 19:43:22,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167157 to 77149. [2021-08-06 19:43:22,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77149 states, 77148 states have (on average 2.3799580027998135) internal successors, (183609), 77148 states have internal predecessors, (183609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:22,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77149 states to 77149 states and 183609 transitions. [2021-08-06 19:43:22,765 INFO L78 Accepts]: Start accepts. Automaton has 77149 states and 183609 transitions. Word has length 25 [2021-08-06 19:43:22,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:43:22,765 INFO L470 AbstractCegarLoop]: Abstraction has 77149 states and 183609 transitions. [2021-08-06 19:43:22,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:22,765 INFO L276 IsEmpty]: Start isEmpty. Operand 77149 states and 183609 transitions. [2021-08-06 19:43:22,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:43:22,821 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:43:22,821 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:43:22,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2021-08-06 19:43:23,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-08-06 19:43:23,036 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:43:23,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:43:23,037 INFO L82 PathProgramCache]: Analyzing trace with hash 263774853, now seen corresponding path program 188 times [2021-08-06 19:43:23,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:43:23,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169567515] [2021-08-06 19:43:23,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:43:23,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:43:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:43:23,170 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 23 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:23,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:43:23,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169567515] [2021-08-06 19:43:23,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169567515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:23,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126719714] [2021-08-06 19:43:23,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:43:23,171 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:23,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:43:23,172 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:43:23,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2021-08-06 19:43:25,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:43:25,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:43:25,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:43:25,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:43:25,136 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:43:25,136 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:43:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 25 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:25,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126719714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:25,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:43:25,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-08-06 19:43:25,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763952682] [2021-08-06 19:43:25,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:43:25,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:43:25,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:43:25,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:43:25,151 INFO L87 Difference]: Start difference. First operand 77149 states and 183609 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:25,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:43:25,676 INFO L93 Difference]: Finished difference Result 107009 states and 255629 transitions. [2021-08-06 19:43:25,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:43:25,676 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:43:25,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:43:26,151 INFO L225 Difference]: With dead ends: 107009 [2021-08-06 19:43:26,151 INFO L226 Difference]: Without dead ends: 107009 [2021-08-06 19:43:26,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 130.0ms TimeCoverageRelationStatistics Valid=217, Invalid=383, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:43:26,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107009 states. [2021-08-06 19:43:27,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107009 to 74045. [2021-08-06 19:43:27,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74045 states, 74044 states have (on average 2.3808681324617793) internal successors, (176289), 74044 states have internal predecessors, (176289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:28,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74045 states to 74045 states and 176289 transitions. [2021-08-06 19:43:28,141 INFO L78 Accepts]: Start accepts. Automaton has 74045 states and 176289 transitions. Word has length 25 [2021-08-06 19:43:28,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:43:28,141 INFO L470 AbstractCegarLoop]: Abstraction has 74045 states and 176289 transitions. [2021-08-06 19:43:28,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:28,141 INFO L276 IsEmpty]: Start isEmpty. Operand 74045 states and 176289 transitions. [2021-08-06 19:43:28,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:43:28,193 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:43:28,193 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:43:28,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2021-08-06 19:43:28,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:28,414 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:43:28,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:43:28,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1357866441, now seen corresponding path program 189 times [2021-08-06 19:43:28,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:43:28,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837789149] [2021-08-06 19:43:28,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:43:28,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:43:28,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:43:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:28,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:43:28,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837789149] [2021-08-06 19:43:28,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837789149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:28,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350260307] [2021-08-06 19:43:28,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:43:28,543 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:28,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:43:28,544 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:43:28,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2021-08-06 19:43:30,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 19:43:30,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:43:30,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:43:30,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:43:30,476 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:43:30,476 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:43:30,490 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 17 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:30,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350260307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:30,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:43:30,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-08-06 19:43:30,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750862459] [2021-08-06 19:43:30,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:43:30,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:43:30,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:43:30,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:43:30,491 INFO L87 Difference]: Start difference. First operand 74045 states and 176289 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:30,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:43:30,954 INFO L93 Difference]: Finished difference Result 81211 states and 192543 transitions. [2021-08-06 19:43:30,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 19:43:30,954 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:43:30,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:43:31,154 INFO L225 Difference]: With dead ends: 81211 [2021-08-06 19:43:31,154 INFO L226 Difference]: Without dead ends: 81211 [2021-08-06 19:43:31,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 192.7ms TimeCoverageRelationStatistics Valid=381, Invalid=675, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 19:43:31,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81211 states. [2021-08-06 19:43:32,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81211 to 67311. [2021-08-06 19:43:32,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67311 states, 67310 states have (on average 2.3785915911454465) internal successors, (160103), 67310 states have internal predecessors, (160103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:32,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67311 states to 67311 states and 160103 transitions. [2021-08-06 19:43:32,875 INFO L78 Accepts]: Start accepts. Automaton has 67311 states and 160103 transitions. Word has length 25 [2021-08-06 19:43:32,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:43:32,875 INFO L470 AbstractCegarLoop]: Abstraction has 67311 states and 160103 transitions. [2021-08-06 19:43:32,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:32,875 INFO L276 IsEmpty]: Start isEmpty. Operand 67311 states and 160103 transitions. [2021-08-06 19:43:32,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:43:32,915 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:43:32,916 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:43:32,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2021-08-06 19:43:33,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:33,133 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:43:33,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:43:33,133 INFO L82 PathProgramCache]: Analyzing trace with hash -989785817, now seen corresponding path program 190 times [2021-08-06 19:43:33,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:43:33,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722045140] [2021-08-06 19:43:33,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:43:33,134 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:43:33,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:43:33,240 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 43 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:33,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:43:33,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722045140] [2021-08-06 19:43:33,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722045140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:33,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310769190] [2021-08-06 19:43:33,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:43:33,245 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:33,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:43:33,247 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:43:33,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2021-08-06 19:43:35,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:43:35,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:43:35,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:43:35,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:43:35,189 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:43:35,190 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:43:35,203 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 48 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:43:35,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310769190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:35,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:43:35,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-06 19:43:35,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389787034] [2021-08-06 19:43:35,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:43:35,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:43:35,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:43:35,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=155, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:43:35,205 INFO L87 Difference]: Start difference. First operand 67311 states and 160103 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:35,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:43:35,612 INFO L93 Difference]: Finished difference Result 67448 states and 160270 transitions. [2021-08-06 19:43:35,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:43:35,613 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:43:35,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:43:35,785 INFO L225 Difference]: With dead ends: 67448 [2021-08-06 19:43:35,785 INFO L226 Difference]: Without dead ends: 67446 [2021-08-06 19:43:35,785 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=325, Invalid=545, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:43:35,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67446 states. [2021-08-06 19:43:37,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67446 to 66916. [2021-08-06 19:43:37,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66916 states, 66915 states have (on average 2.3754614062616755) internal successors, (158954), 66915 states have internal predecessors, (158954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:37,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66916 states to 66916 states and 158954 transitions. [2021-08-06 19:43:37,371 INFO L78 Accepts]: Start accepts. Automaton has 66916 states and 158954 transitions. Word has length 25 [2021-08-06 19:43:37,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:43:37,371 INFO L470 AbstractCegarLoop]: Abstraction has 66916 states and 158954 transitions. [2021-08-06 19:43:37,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:37,372 INFO L276 IsEmpty]: Start isEmpty. Operand 66916 states and 158954 transitions. [2021-08-06 19:43:37,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:43:37,418 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:43:37,418 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:43:37,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2021-08-06 19:43:37,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:37,637 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:43:37,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:43:37,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1586837773, now seen corresponding path program 191 times [2021-08-06 19:43:37,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:43:37,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333976352] [2021-08-06 19:43:37,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:43:37,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:43:37,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:43:37,741 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 39 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:37,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:43:37,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333976352] [2021-08-06 19:43:37,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333976352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:37,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911409680] [2021-08-06 19:43:37,741 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:43:37,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:37,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:43:37,743 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:43:37,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2021-08-06 19:43:39,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 19:43:39,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:43:39,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:43:39,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:43:39,517 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:43:39,518 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:43:39,600 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 44 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:39,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911409680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:39,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:43:39,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-06 19:43:39,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006026152] [2021-08-06 19:43:39,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:43:39,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:43:39,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:43:39,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=155, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:43:39,601 INFO L87 Difference]: Start difference. First operand 66916 states and 158954 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:39,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:43:39,923 INFO L93 Difference]: Finished difference Result 67886 states and 160661 transitions. [2021-08-06 19:43:39,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:43:39,923 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:43:39,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:43:40,090 INFO L225 Difference]: With dead ends: 67886 [2021-08-06 19:43:40,090 INFO L226 Difference]: Without dead ends: 67886 [2021-08-06 19:43:40,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=149, Invalid=193, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:43:40,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67886 states. [2021-08-06 19:43:41,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67886 to 66951. [2021-08-06 19:43:41,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66951 states, 66950 states have (on average 2.3735175504107544) internal successors, (158907), 66950 states have internal predecessors, (158907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:41,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66951 states to 66951 states and 158907 transitions. [2021-08-06 19:43:41,747 INFO L78 Accepts]: Start accepts. Automaton has 66951 states and 158907 transitions. Word has length 25 [2021-08-06 19:43:41,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:43:41,747 INFO L470 AbstractCegarLoop]: Abstraction has 66951 states and 158907 transitions. [2021-08-06 19:43:41,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:41,747 INFO L276 IsEmpty]: Start isEmpty. Operand 66951 states and 158907 transitions. [2021-08-06 19:43:41,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:43:41,781 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:43:41,781 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:43:41,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2021-08-06 19:43:41,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:41,995 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:43:41,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:43:41,995 INFO L82 PathProgramCache]: Analyzing trace with hash -997516215, now seen corresponding path program 192 times [2021-08-06 19:43:41,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:43:41,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983624242] [2021-08-06 19:43:41,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:43:41,995 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:43:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:43:42,107 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 33 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:43:42,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:43:42,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983624242] [2021-08-06 19:43:42,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983624242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:42,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139508080] [2021-08-06 19:43:42,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:43:42,108 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:42,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:43:42,109 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:43:42,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2021-08-06 19:43:43,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 19:43:43,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:43:43,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:43:43,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:43:43,970 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:43:43,970 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:43:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 37 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:43:43,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139508080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:43,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:43:43,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-06 19:43:43,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486661655] [2021-08-06 19:43:43,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:43:43,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:43:43,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:43:43,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:43:43,988 INFO L87 Difference]: Start difference. First operand 66951 states and 158907 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:44,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:43:44,411 INFO L93 Difference]: Finished difference Result 67065 states and 158800 transitions. [2021-08-06 19:43:44,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:43:44,411 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:43:44,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:43:44,557 INFO L225 Difference]: With dead ends: 67065 [2021-08-06 19:43:44,557 INFO L226 Difference]: Without dead ends: 67065 [2021-08-06 19:43:44,557 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 85.7ms TimeCoverageRelationStatistics Valid=153, Invalid=227, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:43:44,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67065 states. [2021-08-06 19:43:45,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67065 to 66552. [2021-08-06 19:43:45,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66552 states, 66551 states have (on average 2.372361046415531) internal successors, (157883), 66551 states have internal predecessors, (157883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:46,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66552 states to 66552 states and 157883 transitions. [2021-08-06 19:43:46,033 INFO L78 Accepts]: Start accepts. Automaton has 66552 states and 157883 transitions. Word has length 25 [2021-08-06 19:43:46,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:43:46,033 INFO L470 AbstractCegarLoop]: Abstraction has 66552 states and 157883 transitions. [2021-08-06 19:43:46,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:46,033 INFO L276 IsEmpty]: Start isEmpty. Operand 66552 states and 157883 transitions. [2021-08-06 19:43:46,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:43:46,078 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:43:46,078 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:43:46,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2021-08-06 19:43:46,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:46,293 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:43:46,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:43:46,293 INFO L82 PathProgramCache]: Analyzing trace with hash 491888781, now seen corresponding path program 193 times [2021-08-06 19:43:46,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:43:46,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592414414] [2021-08-06 19:43:46,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:43:46,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:43:46,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:43:46,406 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 28 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:46,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:43:46,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592414414] [2021-08-06 19:43:46,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592414414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:46,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855798106] [2021-08-06 19:43:46,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:43:46,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:46,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:43:46,407 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:43:46,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2021-08-06 19:43:48,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:43:48,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:43:48,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:43:48,451 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:43:48,452 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:43:48,466 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 31 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:48,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855798106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:48,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:43:48,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-06 19:43:48,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511768986] [2021-08-06 19:43:48,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:43:48,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:43:48,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:43:48,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=218, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:43:48,471 INFO L87 Difference]: Start difference. First operand 66552 states and 157883 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:48,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:43:48,814 INFO L93 Difference]: Finished difference Result 71833 states and 168324 transitions. [2021-08-06 19:43:48,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:43:48,814 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:43:48,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:43:48,971 INFO L225 Difference]: With dead ends: 71833 [2021-08-06 19:43:48,971 INFO L226 Difference]: Without dead ends: 71833 [2021-08-06 19:43:48,971 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=214, Invalid=338, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:43:49,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71833 states. [2021-08-06 19:43:50,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71833 to 66493. [2021-08-06 19:43:50,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66493 states, 66492 states have (on average 2.370420501714492) internal successors, (157614), 66492 states have internal predecessors, (157614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:50,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66493 states to 66493 states and 157614 transitions. [2021-08-06 19:43:50,531 INFO L78 Accepts]: Start accepts. Automaton has 66493 states and 157614 transitions. Word has length 25 [2021-08-06 19:43:50,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:43:50,531 INFO L470 AbstractCegarLoop]: Abstraction has 66493 states and 157614 transitions. [2021-08-06 19:43:50,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:50,531 INFO L276 IsEmpty]: Start isEmpty. Operand 66493 states and 157614 transitions. [2021-08-06 19:43:50,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:43:50,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:43:50,573 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:43:50,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2021-08-06 19:43:50,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:50,793 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:43:50,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:43:50,793 INFO L82 PathProgramCache]: Analyzing trace with hash -581196599, now seen corresponding path program 194 times [2021-08-06 19:43:50,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:43:50,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757796821] [2021-08-06 19:43:50,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:43:50,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:43:50,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:43:50,909 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 22 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:50,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:43:50,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757796821] [2021-08-06 19:43:50,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757796821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:50,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779507064] [2021-08-06 19:43:50,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:43:50,910 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:50,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:43:50,910 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:43:50,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2021-08-06 19:43:52,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:43:52,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:43:52,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:43:52,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:43:52,804 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:43:52,805 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:43:52,819 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 24 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:52,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779507064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:52,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:43:52,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-06 19:43:52,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197461417] [2021-08-06 19:43:52,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:43:52,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:43:52,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:43:52,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:43:52,820 INFO L87 Difference]: Start difference. First operand 66493 states and 157614 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:53,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:43:53,361 INFO L93 Difference]: Finished difference Result 102576 states and 244038 transitions. [2021-08-06 19:43:53,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:43:53,361 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:43:53,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:43:53,635 INFO L225 Difference]: With dead ends: 102576 [2021-08-06 19:43:53,635 INFO L226 Difference]: Without dead ends: 102576 [2021-08-06 19:43:53,635 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 120.6ms TimeCoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:43:53,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102576 states. [2021-08-06 19:43:55,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102576 to 78031. [2021-08-06 19:43:55,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78031 states, 78030 states have (on average 2.370806100217865) internal successors, (184994), 78030 states have internal predecessors, (184994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:55,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78031 states to 78031 states and 184994 transitions. [2021-08-06 19:43:55,801 INFO L78 Accepts]: Start accepts. Automaton has 78031 states and 184994 transitions. Word has length 25 [2021-08-06 19:43:55,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:43:55,801 INFO L470 AbstractCegarLoop]: Abstraction has 78031 states and 184994 transitions. [2021-08-06 19:43:55,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:55,801 INFO L276 IsEmpty]: Start isEmpty. Operand 78031 states and 184994 transitions. [2021-08-06 19:43:55,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:43:55,838 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:43:55,838 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:43:55,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2021-08-06 19:43:56,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:56,050 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:43:56,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:43:56,051 INFO L82 PathProgramCache]: Analyzing trace with hash 512894989, now seen corresponding path program 195 times [2021-08-06 19:43:56,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:43:56,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650698725] [2021-08-06 19:43:56,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:43:56,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:43:56,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:43:56,546 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:56,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:43:56,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650698725] [2021-08-06 19:43:56,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650698725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:56,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241741272] [2021-08-06 19:43:56,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:43:56,546 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:56,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:43:56,547 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:43:56,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2021-08-06 19:43:58,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 19:43:58,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:43:58,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:43:58,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:43:58,308 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:43:58,309 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:43:58,321 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 17 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:58,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241741272] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:58,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:43:58,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-06 19:43:58,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695724330] [2021-08-06 19:43:58,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:43:58,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:43:58,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:43:58,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:43:58,322 INFO L87 Difference]: Start difference. First operand 78031 states and 184994 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:58,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:43:58,848 INFO L93 Difference]: Finished difference Result 98748 states and 235085 transitions. [2021-08-06 19:43:58,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:43:58,848 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:43:58,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:43:59,099 INFO L225 Difference]: With dead ends: 98748 [2021-08-06 19:43:59,099 INFO L226 Difference]: Without dead ends: 98748 [2021-08-06 19:43:59,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 165.5ms TimeCoverageRelationStatistics Valid=286, Invalid=526, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:43:59,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98748 states. [2021-08-06 19:44:00,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98748 to 93786. [2021-08-06 19:44:00,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93786 states, 93785 states have (on average 2.380732526523431) internal successors, (223277), 93785 states have internal predecessors, (223277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:01,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93786 states to 93786 states and 223277 transitions. [2021-08-06 19:44:01,145 INFO L78 Accepts]: Start accepts. Automaton has 93786 states and 223277 transitions. Word has length 25 [2021-08-06 19:44:01,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:44:01,145 INFO L470 AbstractCegarLoop]: Abstraction has 93786 states and 223277 transitions. [2021-08-06 19:44:01,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:01,145 INFO L276 IsEmpty]: Start isEmpty. Operand 93786 states and 223277 transitions. [2021-08-06 19:44:01,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:44:01,191 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:44:01,191 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:44:01,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2021-08-06 19:44:01,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:44:01,411 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:44:01,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:44:01,412 INFO L82 PathProgramCache]: Analyzing trace with hash 69995849, now seen corresponding path program 196 times [2021-08-06 19:44:01,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:44:01,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856226241] [2021-08-06 19:44:01,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:44:01,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:44:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:44:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:44:01,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:44:01,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856226241] [2021-08-06 19:44:01,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856226241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:01,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723924254] [2021-08-06 19:44:01,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:44:01,775 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:44:01,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:44:01,805 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:44:01,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2021-08-06 19:44:03,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:44:03,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:44:03,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:44:03,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:44:03,678 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:44:03,679 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:44:03,696 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:44:03,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723924254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:03,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:44:03,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-06 19:44:03,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321234369] [2021-08-06 19:44:03,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:44:03,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:44:03,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:44:03,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:44:03,697 INFO L87 Difference]: Start difference. First operand 93786 states and 223277 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:04,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:44:04,511 INFO L93 Difference]: Finished difference Result 112029 states and 265661 transitions. [2021-08-06 19:44:04,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 19:44:04,511 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:44:04,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:44:04,819 INFO L225 Difference]: With dead ends: 112029 [2021-08-06 19:44:04,819 INFO L226 Difference]: Without dead ends: 112029 [2021-08-06 19:44:04,820 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 230.5ms TimeCoverageRelationStatistics Valid=528, Invalid=954, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 19:44:04,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112029 states. [2021-08-06 19:44:06,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112029 to 105184. [2021-08-06 19:44:07,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105184 states, 105183 states have (on average 2.3945504501678028) internal successors, (251866), 105183 states have internal predecessors, (251866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:07,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105184 states to 105184 states and 251866 transitions. [2021-08-06 19:44:07,738 INFO L78 Accepts]: Start accepts. Automaton has 105184 states and 251866 transitions. Word has length 25 [2021-08-06 19:44:07,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:44:07,738 INFO L470 AbstractCegarLoop]: Abstraction has 105184 states and 251866 transitions. [2021-08-06 19:44:07,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:07,738 INFO L276 IsEmpty]: Start isEmpty. Operand 105184 states and 251866 transitions. [2021-08-06 19:44:07,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:44:07,785 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:44:07,785 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:44:07,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2021-08-06 19:44:08,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-08-06 19:44:08,001 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:44:08,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:44:08,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1195068843, now seen corresponding path program 197 times [2021-08-06 19:44:08,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:44:08,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50515884] [2021-08-06 19:44:08,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:44:08,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:44:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:44:08,090 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 31 proven. 53 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 19:44:08,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:44:08,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50515884] [2021-08-06 19:44:08,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50515884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:08,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11677583] [2021-08-06 19:44:08,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:44:08,090 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:44:08,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:44:08,091 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:44:08,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2021-08-06 19:44:10,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 19:44:10,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:44:10,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:44:10,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:44:10,078 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:44:10,079 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:44:10,093 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 33 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 19:44:10,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11677583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:10,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:44:10,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 19:44:10,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485273147] [2021-08-06 19:44:10,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:44:10,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:44:10,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:44:10,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:44:10,093 INFO L87 Difference]: Start difference. First operand 105184 states and 251866 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:10,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:44:10,711 INFO L93 Difference]: Finished difference Result 105961 states and 253798 transitions. [2021-08-06 19:44:10,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:44:10,711 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 25 [2021-08-06 19:44:10,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:44:11,042 INFO L225 Difference]: With dead ends: 105961 [2021-08-06 19:44:11,043 INFO L226 Difference]: Without dead ends: 105959 [2021-08-06 19:44:11,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 208.1ms TimeCoverageRelationStatistics Valid=244, Invalid=458, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:44:11,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105959 states. [2021-08-06 19:44:13,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105959 to 105878. [2021-08-06 19:44:13,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105878 states, 105877 states have (on average 2.3962616998970505) internal successors, (253709), 105877 states have internal predecessors, (253709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:13,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105878 states to 105878 states and 253709 transitions. [2021-08-06 19:44:13,763 INFO L78 Accepts]: Start accepts. Automaton has 105878 states and 253709 transitions. Word has length 25 [2021-08-06 19:44:13,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:44:13,764 INFO L470 AbstractCegarLoop]: Abstraction has 105878 states and 253709 transitions. [2021-08-06 19:44:13,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:13,764 INFO L276 IsEmpty]: Start isEmpty. Operand 105878 states and 253709 transitions. [2021-08-06 19:44:13,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:44:13,818 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:44:13,818 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:44:13,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Forceful destruction successful, exit code 0 [2021-08-06 19:44:14,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-08-06 19:44:14,038 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:44:14,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:44:14,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1005115755, now seen corresponding path program 198 times [2021-08-06 19:44:14,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:44:14,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957319373] [2021-08-06 19:44:14,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:44:14,039 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:44:14,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:44:14,145 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 25 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:44:14,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:44:14,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957319373] [2021-08-06 19:44:14,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957319373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:14,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103553357] [2021-08-06 19:44:14,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:44:14,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:44:14,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:44:14,147 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:44:14,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2021-08-06 19:44:16,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 19:44:16,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:44:16,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:44:16,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:44:16,437 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:44:16,438 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:44:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 27 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:44:16,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103553357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:16,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:44:16,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-06 19:44:16,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14813584] [2021-08-06 19:44:16,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:44:16,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:44:16,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:44:16,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:44:16,452 INFO L87 Difference]: Start difference. First operand 105878 states and 253709 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:17,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:44:17,056 INFO L93 Difference]: Finished difference Result 116449 states and 277400 transitions. [2021-08-06 19:44:17,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:44:17,056 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 25 [2021-08-06 19:44:17,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:44:17,590 INFO L225 Difference]: With dead ends: 116449 [2021-08-06 19:44:17,591 INFO L226 Difference]: Without dead ends: 116449 [2021-08-06 19:44:17,591 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 134.9ms TimeCoverageRelationStatistics Valid=259, Invalid=443, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:44:17,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116449 states. [2021-08-06 19:44:20,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116449 to 109614. [2021-08-06 19:44:20,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109614 states, 109613 states have (on average 2.406977274593342) internal successors, (263836), 109613 states have internal predecessors, (263836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:20,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109614 states to 109614 states and 263836 transitions. [2021-08-06 19:44:20,487 INFO L78 Accepts]: Start accepts. Automaton has 109614 states and 263836 transitions. Word has length 25 [2021-08-06 19:44:20,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:44:20,487 INFO L470 AbstractCegarLoop]: Abstraction has 109614 states and 263836 transitions. [2021-08-06 19:44:20,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:20,487 INFO L276 IsEmpty]: Start isEmpty. Operand 109614 states and 263836 transitions. [2021-08-06 19:44:20,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:44:20,542 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:44:20,542 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:44:20,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Forceful destruction successful, exit code 0 [2021-08-06 19:44:20,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-08-06 19:44:20,750 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:44:20,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:44:20,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1448014895, now seen corresponding path program 199 times [2021-08-06 19:44:20,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:44:20,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725268670] [2021-08-06 19:44:20,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:44:20,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:44:20,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:44:20,864 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 27 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:44:20,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:44:20,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725268670] [2021-08-06 19:44:20,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725268670] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:20,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026142807] [2021-08-06 19:44:20,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:44:20,864 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:44:20,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:44:20,865 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:44:20,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2021-08-06 19:44:22,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:44:22,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:44:22,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:44:22,847 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:44:22,847 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:44:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 30 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:44:22,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026142807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:22,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:44:22,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-08-06 19:44:22,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114510407] [2021-08-06 19:44:22,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:44:22,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:44:22,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:44:22,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:44:22,862 INFO L87 Difference]: Start difference. First operand 109614 states and 263836 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:23,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:44:23,455 INFO L93 Difference]: Finished difference Result 120813 states and 286878 transitions. [2021-08-06 19:44:23,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:44:23,455 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:44:23,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:44:24,018 INFO L225 Difference]: With dead ends: 120813 [2021-08-06 19:44:24,018 INFO L226 Difference]: Without dead ends: 120813 [2021-08-06 19:44:24,018 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=281, Invalid=475, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:44:24,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120813 states. [2021-08-06 19:44:25,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120813 to 92199. [2021-08-06 19:44:26,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92199 states, 92198 states have (on average 2.381396559578299) internal successors, (219560), 92198 states have internal predecessors, (219560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:26,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92199 states to 92199 states and 219560 transitions. [2021-08-06 19:44:26,685 INFO L78 Accepts]: Start accepts. Automaton has 92199 states and 219560 transitions. Word has length 25 [2021-08-06 19:44:26,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:44:26,685 INFO L470 AbstractCegarLoop]: Abstraction has 92199 states and 219560 transitions. [2021-08-06 19:44:26,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:26,685 INFO L276 IsEmpty]: Start isEmpty. Operand 92199 states and 219560 transitions. [2021-08-06 19:44:26,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:44:26,726 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:44:26,726 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:44:26,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Forceful destruction successful, exit code 0 [2021-08-06 19:44:26,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-08-06 19:44:26,947 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:44:26,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:44:26,947 INFO L82 PathProgramCache]: Analyzing trace with hash -353923307, now seen corresponding path program 200 times [2021-08-06 19:44:26,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:44:26,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6483534] [2021-08-06 19:44:26,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:44:26,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:44:26,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:44:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 20 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:44:27,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:44:27,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6483534] [2021-08-06 19:44:27,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6483534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:27,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503534931] [2021-08-06 19:44:27,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:44:27,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:44:27,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:44:27,066 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:44:27,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2021-08-06 19:44:28,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:44:28,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:44:28,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:44:28,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:44:28,937 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:44:28,938 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:44:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 22 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:44:28,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503534931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:28,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:44:28,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-08-06 19:44:28,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679717957] [2021-08-06 19:44:28,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:44:28,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:44:28,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:44:28,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:44:28,952 INFO L87 Difference]: Start difference. First operand 92199 states and 219560 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:29,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:44:29,614 INFO L93 Difference]: Finished difference Result 115713 states and 274544 transitions. [2021-08-06 19:44:29,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 19:44:29,614 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:44:29,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:44:29,935 INFO L225 Difference]: With dead ends: 115713 [2021-08-06 19:44:29,936 INFO L226 Difference]: Without dead ends: 115713 [2021-08-06 19:44:29,936 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 186.9ms TimeCoverageRelationStatistics Valid=380, Invalid=676, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 19:44:30,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115713 states. [2021-08-06 19:44:32,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115713 to 109634. [2021-08-06 19:44:32,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109634 states, 109633 states have (on average 2.394215245409685) internal successors, (262485), 109633 states have internal predecessors, (262485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:32,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109634 states to 109634 states and 262485 transitions. [2021-08-06 19:44:32,819 INFO L78 Accepts]: Start accepts. Automaton has 109634 states and 262485 transitions. Word has length 25 [2021-08-06 19:44:32,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:44:32,819 INFO L470 AbstractCegarLoop]: Abstraction has 109634 states and 262485 transitions. [2021-08-06 19:44:32,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:32,819 INFO L276 IsEmpty]: Start isEmpty. Operand 109634 states and 262485 transitions. [2021-08-06 19:44:32,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:44:32,867 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:44:32,867 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:44:32,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2021-08-06 19:44:33,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:44:33,073 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:44:33,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:44:33,073 INFO L82 PathProgramCache]: Analyzing trace with hash 2001980949, now seen corresponding path program 201 times [2021-08-06 19:44:33,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:44:33,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594275087] [2021-08-06 19:44:33,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:44:33,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:44:33,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:44:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 27 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:44:33,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:44:33,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594275087] [2021-08-06 19:44:33,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594275087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:33,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036794125] [2021-08-06 19:44:33,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:44:33,772 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:44:33,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:44:33,780 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:44:33,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2021-08-06 19:44:35,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 19:44:35,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:44:35,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:44:35,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:44:35,734 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:44:35,735 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:44:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 30 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:44:35,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036794125] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:35,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:44:35,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-06 19:44:35,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955300651] [2021-08-06 19:44:35,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:44:35,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:44:35,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:44:35,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:44:35,752 INFO L87 Difference]: Start difference. First operand 109634 states and 262485 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:36,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:44:36,468 INFO L93 Difference]: Finished difference Result 120814 states and 284836 transitions. [2021-08-06 19:44:36,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:44:36,468 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:44:36,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:44:36,799 INFO L225 Difference]: With dead ends: 120814 [2021-08-06 19:44:36,799 INFO L226 Difference]: Without dead ends: 120814 [2021-08-06 19:44:36,800 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 141.1ms TimeCoverageRelationStatistics Valid=283, Invalid=473, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:44:36,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120814 states. [2021-08-06 19:44:38,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120814 to 65561. [2021-08-06 19:44:38,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65561 states, 65560 states have (on average 2.3557657107992678) internal successors, (154444), 65560 states have internal predecessors, (154444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:39,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65561 states to 65561 states and 154444 transitions. [2021-08-06 19:44:39,320 INFO L78 Accepts]: Start accepts. Automaton has 65561 states and 154444 transitions. Word has length 25 [2021-08-06 19:44:39,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:44:39,320 INFO L470 AbstractCegarLoop]: Abstraction has 65561 states and 154444 transitions. [2021-08-06 19:44:39,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:39,320 INFO L276 IsEmpty]: Start isEmpty. Operand 65561 states and 154444 transitions. [2021-08-06 19:44:39,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:44:39,364 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:44:39,364 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:44:39,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2021-08-06 19:44:39,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:44:39,585 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:44:39,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:44:39,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1198894759, now seen corresponding path program 202 times [2021-08-06 19:44:39,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:44:39,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129642261] [2021-08-06 19:44:39,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:44:39,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:44:39,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:44:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 21 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:44:39,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:44:39,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129642261] [2021-08-06 19:44:39,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129642261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:39,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492871880] [2021-08-06 19:44:39,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:44:39,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:44:39,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:44:39,729 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:44:39,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2021-08-06 19:44:41,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:44:41,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:44:41,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:44:41,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:44:41,564 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:44:41,565 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:44:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 23 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:44:41,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492871880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:41,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:44:41,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-06 19:44:41,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177540714] [2021-08-06 19:44:41,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:44:41,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:44:41,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:44:41,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:44:41,579 INFO L87 Difference]: Start difference. First operand 65561 states and 154444 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:42,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:44:42,026 INFO L93 Difference]: Finished difference Result 91129 states and 214264 transitions. [2021-08-06 19:44:42,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:44:42,027 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:44:42,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:44:42,266 INFO L225 Difference]: With dead ends: 91129 [2021-08-06 19:44:42,266 INFO L226 Difference]: Without dead ends: 91129 [2021-08-06 19:44:42,267 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 141.9ms TimeCoverageRelationStatistics Valid=285, Invalid=527, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:44:42,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91129 states. [2021-08-06 19:44:43,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91129 to 57777. [2021-08-06 19:44:43,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57777 states, 57776 states have (on average 2.347151066186652) internal successors, (135609), 57776 states have internal predecessors, (135609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:44,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57777 states to 57777 states and 135609 transitions. [2021-08-06 19:44:44,117 INFO L78 Accepts]: Start accepts. Automaton has 57777 states and 135609 transitions. Word has length 25 [2021-08-06 19:44:44,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:44:44,117 INFO L470 AbstractCegarLoop]: Abstraction has 57777 states and 135609 transitions. [2021-08-06 19:44:44,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:44,118 INFO L276 IsEmpty]: Start isEmpty. Operand 57777 states and 135609 transitions. [2021-08-06 19:44:44,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:44:44,148 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:44:44,148 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:44:44,350 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forcibly destroying the process [2021-08-06 19:44:44,551 FATAL L548 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Could not destroy process within 200 ms, abandoning it [2021-08-06 19:44:44,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-08-06 19:44:44,551 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:44:44,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:44:44,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1641793899, now seen corresponding path program 203 times [2021-08-06 19:44:44,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:44:44,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502818770] [2021-08-06 19:44:44,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:44:44,552 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:44:44,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat