/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 20:04:41,547 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 20:04:41,549 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 20:04:41,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 20:04:41,665 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 20:04:41,666 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 20:04:41,666 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 20:04:41,667 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 20:04:41,714 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 20:04:41,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 20:04:41,717 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 20:04:41,717 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 20:04:41,717 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 20:04:41,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 20:04:41,717 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 20:04:41,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 20:04:41,717 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 20:04:41,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 20:04:41,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 20:04:41,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 20:04:41,718 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 20:04:41,719 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 20:04:41,719 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 20:04:41,719 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 20:04:41,719 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 20:04:41,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 20:04:41,719 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 20:04:41,719 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 20:04:41,719 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 20:04:41,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:04:41,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 20:04:41,720 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 20:04:41,720 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 20:04:41,720 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 20:04:41,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 20:04:41,720 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 20:04:41,720 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 20:04:41,720 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 20:04:41,721 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 20:04:42,144 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 20:04:42,167 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 20:04:42,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 20:04:42,169 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 20:04:42,170 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 20:04:42,171 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr-alt.wvr.bpl [2021-08-06 20:04:42,184 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr-alt.wvr.bpl' [2021-08-06 20:04:42,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 20:04:42,211 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 20:04:42,212 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 20:04:42,212 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 20:04:42,212 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 20:04:42,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:04:42" (1/1) ... [2021-08-06 20:04:42,241 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:04:42" (1/1) ... [2021-08-06 20:04:42,277 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 20:04:42,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 20:04:42,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 20:04:42,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 20:04:42,291 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:04:42" (1/1) ... [2021-08-06 20:04:42,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:04:42" (1/1) ... [2021-08-06 20:04:42,292 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:04:42" (1/1) ... [2021-08-06 20:04:42,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:04:42" (1/1) ... [2021-08-06 20:04:42,300 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:04:42" (1/1) ... [2021-08-06 20:04:42,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:04:42" (1/1) ... [2021-08-06 20:04:42,303 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:04:42" (1/1) ... [2021-08-06 20:04:42,304 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 20:04:42,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 20:04:42,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 20:04:42,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 20:04:42,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:04:42" (1/1) ... [2021-08-06 20:04:42,334 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:04:42,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:42,370 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 20:04:42,396 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 20:04:42,431 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 20:04:42,431 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 20:04:42,431 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 20:04:42,431 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 20:04:42,431 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 20:04:42,431 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 20:04:42,431 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 20:04:42,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 20:04:42,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 20:04:42,432 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 20:04:42,682 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 20:04:42,682 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 20:04:42,688 INFO L202 PluginConnector]: Adding new model nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:04:42 BoogieIcfgContainer [2021-08-06 20:04:42,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 20:04:42,689 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 20:04:42,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 20:04:42,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 20:04:42,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:04:42" (1/2) ... [2021-08-06 20:04:42,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66dcaa6b and model type nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 08:04:42, skipping insertion in model container [2021-08-06 20:04:42,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:04:42" (2/2) ... [2021-08-06 20:04:42,693 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-cntr-alt.wvr.bpl [2021-08-06 20:04:42,696 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 20:04:42,696 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 20:04:42,696 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 20:04:42,696 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 20:04:42,759 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-06 20:04:42,804 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 20:04:42,829 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 20:04:42,829 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-06 20:04:42,960 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.52) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:42,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 20:04:42,964 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:42,964 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:04:42,965 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:04:42,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:42,968 INFO L82 PathProgramCache]: Analyzing trace with hash -425687439, now seen corresponding path program 1 times [2021-08-06 20:04:42,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:42,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967889428] [2021-08-06 20:04:42,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:42,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:43,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:43,213 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 20:04:43,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:43,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967889428] [2021-08-06 20:04:43,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967889428] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:04:43,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:04:43,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 20:04:43,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387180568] [2021-08-06 20:04:43,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 20:04:43,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:43,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 20:04:43,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 20:04:43,232 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.52) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:43,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:43,267 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2021-08-06 20:04:43,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 20:04:43,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 20:04:43,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:43,279 INFO L225 Difference]: With dead ends: 43 [2021-08-06 20:04:43,280 INFO L226 Difference]: Without dead ends: 28 [2021-08-06 20:04:43,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:04:43,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-06 20:04:43,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2021-08-06 20:04:43,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 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 20:04:43,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2021-08-06 20:04:43,305 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 15 [2021-08-06 20:04:43,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:43,305 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2021-08-06 20:04:43,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:43,306 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2021-08-06 20:04:43,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 20:04:43,306 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:43,307 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:04:43,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 20:04:43,307 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:04:43,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:43,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1909758895, now seen corresponding path program 1 times [2021-08-06 20:04:43,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:43,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844823228] [2021-08-06 20:04:43,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:43,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:43,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:04:43,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:43,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844823228] [2021-08-06 20:04:43,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844823228] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:04:43,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:04:43,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 20:04:43,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243502721] [2021-08-06 20:04:43,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 20:04:43,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:43,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 20:04:43,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 20:04:43,411 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:43,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:43,443 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2021-08-06 20:04:43,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 20:04:43,457 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 20:04:43,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:43,459 INFO L225 Difference]: With dead ends: 35 [2021-08-06 20:04:43,459 INFO L226 Difference]: Without dead ends: 35 [2021-08-06 20:04:43,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:04:43,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-06 20:04:43,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2021-08-06 20:04:43,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.4482758620689655) 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 20:04:43,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 42 transitions. [2021-08-06 20:04:43,467 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 42 transitions. Word has length 17 [2021-08-06 20:04:43,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:43,468 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 42 transitions. [2021-08-06 20:04:43,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:43,468 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 42 transitions. [2021-08-06 20:04:43,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 20:04:43,469 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:43,469 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:04:43,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 20:04:43,469 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:04:43,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:43,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1508550927, now seen corresponding path program 1 times [2021-08-06 20:04:43,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:43,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382924405] [2021-08-06 20:04:43,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:43,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:43,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:43,761 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 27.7 percent of original size [2021-08-06 20:04:43,786 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 27.7 percent of original size [2021-08-06 20:04:43,832 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:04:43,842 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:04:43,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:43,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:43,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382924405] [2021-08-06 20:04:43,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382924405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:43,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585673483] [2021-08-06 20:04:43,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:43,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:43,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:43,925 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 20:04:43,952 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 20:04:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:43,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 20:04:43,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:04:44,312 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:04:44,317 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:04:44,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:44,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585673483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:44,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:04:44,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 20:04:44,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682038148] [2021-08-06 20:04:44,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:04:44,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:44,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:04:44,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:04:44,467 INFO L87 Difference]: Start difference. First operand 30 states and 42 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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 20:04:44,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:44,584 INFO L93 Difference]: Finished difference Result 70 states and 103 transitions. [2021-08-06 20:04:44,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:04:44,584 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 20:04:44,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:44,585 INFO L225 Difference]: With dead ends: 70 [2021-08-06 20:04:44,585 INFO L226 Difference]: Without dead ends: 52 [2021-08-06 20:04:44,585 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 288.9ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:04:44,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-06 20:04:44,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 39. [2021-08-06 20:04:44,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 38 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:44,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 59 transitions. [2021-08-06 20:04:44,589 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 59 transitions. Word has length 19 [2021-08-06 20:04:44,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:44,589 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 59 transitions. [2021-08-06 20:04:44,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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 20:04:44,589 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 59 transitions. [2021-08-06 20:04:44,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 20:04:44,590 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:44,590 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:04:44,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-06 20:04:44,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:44,805 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:04:44,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:44,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1768472305, now seen corresponding path program 2 times [2021-08-06 20:04:44,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:44,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484612] [2021-08-06 20:04:44,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:44,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:44,902 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 27.7 percent of original size [2021-08-06 20:04:44,908 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 27.7 percent of original size [2021-08-06 20:04:44,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:44,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:44,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484612] [2021-08-06 20:04:44,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:44,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448886659] [2021-08-06 20:04:44,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:04:44,971 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:44,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:44,972 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 20:04:45,000 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 20:04:45,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:04:45,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:04:45,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 20:04:45,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:04:45,316 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:04:45,322 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:04:45,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:45,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448886659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:45,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:04:45,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 20:04:45,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107868056] [2021-08-06 20:04:45,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:04:45,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:45,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:04:45,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:04:45,532 INFO L87 Difference]: Start difference. First operand 39 states and 59 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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 20:04:45,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:45,687 INFO L93 Difference]: Finished difference Result 65 states and 100 transitions. [2021-08-06 20:04:45,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:04:45,688 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 20:04:45,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:45,689 INFO L225 Difference]: With dead ends: 65 [2021-08-06 20:04:45,689 INFO L226 Difference]: Without dead ends: 57 [2021-08-06 20:04:45,689 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 216.1ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:04:45,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-06 20:04:45,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2021-08-06 20:04:45,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.55) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:45,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 62 transitions. [2021-08-06 20:04:45,692 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 62 transitions. Word has length 19 [2021-08-06 20:04:45,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:45,692 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 62 transitions. [2021-08-06 20:04:45,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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 20:04:45,692 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 62 transitions. [2021-08-06 20:04:45,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 20:04:45,693 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:45,693 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:04:45,715 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 20:04:45,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-06 20:04:45,910 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:04:45,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:45,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1566532305, now seen corresponding path program 3 times [2021-08-06 20:04:45,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:45,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496213332] [2021-08-06 20:04:45,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:45,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:45,999 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 50, result has 66.2 percent of original size [2021-08-06 20:04:46,012 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 50, result has 66.2 percent of original size [2021-08-06 20:04:46,073 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 58, result has 60.8 percent of original size [2021-08-06 20:04:46,081 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 58, result has 60.8 percent of original size [2021-08-06 20:04:46,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:46,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:46,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496213332] [2021-08-06 20:04:46,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496213332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:46,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017397970] [2021-08-06 20:04:46,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:04:46,149 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:46,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:46,153 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 20:04:46,168 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 20:04:46,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:04:46,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:04:46,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 20:04:46,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:04:46,645 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:04:46,649 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:04:46,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:46,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017397970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:46,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:04:46,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 20:04:46,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289106098] [2021-08-06 20:04:46,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 20:04:46,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:46,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 20:04:46,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:04:46,834 INFO L87 Difference]: Start difference. First operand 41 states and 62 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:47,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:47,207 INFO L93 Difference]: Finished difference Result 78 states and 112 transitions. [2021-08-06 20:04:47,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 20:04:47,207 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 20:04:47,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:47,211 INFO L225 Difference]: With dead ends: 78 [2021-08-06 20:04:47,211 INFO L226 Difference]: Without dead ends: 70 [2021-08-06 20:04:47,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 465.6ms TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2021-08-06 20:04:47,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-06 20:04:47,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 40. [2021-08-06 20:04:47,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.435897435897436) internal successors, (56), 39 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:47,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 56 transitions. [2021-08-06 20:04:47,213 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 56 transitions. Word has length 21 [2021-08-06 20:04:47,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:47,214 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 56 transitions. [2021-08-06 20:04:47,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:47,214 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 56 transitions. [2021-08-06 20:04:47,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 20:04:47,214 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:47,214 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:04:47,231 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 20:04:47,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:47,417 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:04:47,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:47,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1710490927, now seen corresponding path program 4 times [2021-08-06 20:04:47,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:47,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624358334] [2021-08-06 20:04:47,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:47,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:47,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:47,537 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 27.7 percent of original size [2021-08-06 20:04:47,544 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 27.7 percent of original size [2021-08-06 20:04:47,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:47,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:47,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624358334] [2021-08-06 20:04:47,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624358334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:47,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508288718] [2021-08-06 20:04:47,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:04:47,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:47,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:47,613 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 20:04:47,640 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 20:04:47,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:04:47,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:04:47,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 20:04:47,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:04:48,077 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:04:48,081 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:04:48,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:48,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508288718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:48,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:04:48,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 20:04:48,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099080247] [2021-08-06 20:04:48,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 20:04:48,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:48,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 20:04:48,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:04:48,293 INFO L87 Difference]: Start difference. First operand 40 states and 56 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:48,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:48,628 INFO L93 Difference]: Finished difference Result 80 states and 111 transitions. [2021-08-06 20:04:48,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:04:48,629 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 20:04:48,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:48,629 INFO L225 Difference]: With dead ends: 80 [2021-08-06 20:04:48,629 INFO L226 Difference]: Without dead ends: 72 [2021-08-06 20:04:48,630 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 386.7ms TimeCoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:04:48,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-06 20:04:48,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 42. [2021-08-06 20:04:48,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 41 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:48,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2021-08-06 20:04:48,632 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 21 [2021-08-06 20:04:48,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:48,633 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2021-08-06 20:04:48,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:48,633 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2021-08-06 20:04:48,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 20:04:48,633 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:48,633 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:04:48,653 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 20:04:48,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:48,842 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:04:48,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:48,843 INFO L82 PathProgramCache]: Analyzing trace with hash 460473583, now seen corresponding path program 5 times [2021-08-06 20:04:48,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:48,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007638058] [2021-08-06 20:04:48,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:48,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:48,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:48,944 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 20:04:48,950 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 20:04:48,972 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 20:04:48,982 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 20:04:49,001 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:04:49,002 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:04:49,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:49,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:49,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007638058] [2021-08-06 20:04:49,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007638058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:49,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572544241] [2021-08-06 20:04:49,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:04:49,023 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:49,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:49,025 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 20:04:49,060 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 20:04:49,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:04:49,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:04:49,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 20:04:49,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:04:49,472 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 55.6 percent of original size [2021-08-06 20:04:49,477 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 55.6 percent of original size [2021-08-06 20:04:49,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:49,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572544241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:49,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:04:49,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 20:04:49,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826660858] [2021-08-06 20:04:49,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 20:04:49,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:49,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 20:04:49,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:04:49,754 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:50,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:50,074 INFO L93 Difference]: Finished difference Result 81 states and 112 transitions. [2021-08-06 20:04:50,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:04:50,074 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 20:04:50,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:50,075 INFO L225 Difference]: With dead ends: 81 [2021-08-06 20:04:50,075 INFO L226 Difference]: Without dead ends: 73 [2021-08-06 20:04:50,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 392.7ms TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2021-08-06 20:04:50,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-06 20:04:50,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 47. [2021-08-06 20:04:50,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.4782608695652173) internal successors, (68), 46 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:50,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 68 transitions. [2021-08-06 20:04:50,079 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 68 transitions. Word has length 21 [2021-08-06 20:04:50,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:50,079 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 68 transitions. [2021-08-06 20:04:50,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:50,080 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 68 transitions. [2021-08-06 20:04:50,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 20:04:50,080 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:50,080 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:04:50,097 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 20:04:50,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:50,285 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:04:50,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:50,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1438017229, now seen corresponding path program 6 times [2021-08-06 20:04:50,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:50,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879516001] [2021-08-06 20:04:50,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:50,286 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:50,383 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 20:04:50,385 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 20:04:50,408 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 20:04:50,409 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 20:04:50,425 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:04:50,426 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:04:50,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:50,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:50,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879516001] [2021-08-06 20:04:50,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879516001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:50,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651985420] [2021-08-06 20:04:50,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:04:50,455 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:50,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:50,456 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 20:04:50,456 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 20:04:50,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:04:50,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:04:50,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 20:04:50,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:04:50,923 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:04:50,931 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:04:51,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:51,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651985420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:51,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:04:51,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 20:04:51,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846174798] [2021-08-06 20:04:51,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 20:04:51,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:51,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 20:04:51,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:04:51,232 INFO L87 Difference]: Start difference. First operand 47 states and 68 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:51,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:51,739 INFO L93 Difference]: Finished difference Result 83 states and 117 transitions. [2021-08-06 20:04:51,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 20:04:51,740 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 20:04:51,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:51,741 INFO L225 Difference]: With dead ends: 83 [2021-08-06 20:04:51,741 INFO L226 Difference]: Without dead ends: 75 [2021-08-06 20:04:51,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 535.0ms TimeCoverageRelationStatistics Valid=217, Invalid=1043, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:04:51,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-06 20:04:51,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 47. [2021-08-06 20:04:51,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.4782608695652173) internal successors, (68), 46 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:51,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 68 transitions. [2021-08-06 20:04:51,744 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 68 transitions. Word has length 21 [2021-08-06 20:04:51,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:51,744 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 68 transitions. [2021-08-06 20:04:51,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:51,744 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 68 transitions. [2021-08-06 20:04:51,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 20:04:51,745 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:51,745 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:04:51,777 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 20:04:51,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:51,961 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:04:51,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:51,961 INFO L82 PathProgramCache]: Analyzing trace with hash -739837839, now seen corresponding path program 7 times [2021-08-06 20:04:51,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:51,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683448674] [2021-08-06 20:04:51,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:51,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:51,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:52,882 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:04:52,887 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:04:52,934 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:04:52,939 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:04:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:52,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:52,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683448674] [2021-08-06 20:04:52,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683448674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:52,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220645204] [2021-08-06 20:04:52,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:04:52,993 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:52,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:52,994 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 20:04:52,995 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 20:04:53,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:53,252 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:04:53,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:04:53,549 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:04:53,552 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:04:53,621 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:04:53,626 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:04:53,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:53,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220645204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:53,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:04:53,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 20:04:53,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319926503] [2021-08-06 20:04:53,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:04:53,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:53,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:04:53,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:04:53,796 INFO L87 Difference]: Start difference. First operand 47 states and 68 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:54,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:54,719 INFO L93 Difference]: Finished difference Result 122 states and 167 transitions. [2021-08-06 20:04:54,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 20:04:54,721 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 20:04:54,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:54,721 INFO L225 Difference]: With dead ends: 122 [2021-08-06 20:04:54,721 INFO L226 Difference]: Without dead ends: 98 [2021-08-06 20:04:54,722 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1378.6ms TimeCoverageRelationStatistics Valid=363, Invalid=2289, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 20:04:54,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-06 20:04:54,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2021-08-06 20:04:54,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.5714285714285714) internal successors, (99), 63 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:54,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 99 transitions. [2021-08-06 20:04:54,725 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 99 transitions. Word has length 23 [2021-08-06 20:04:54,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:54,725 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 99 transitions. [2021-08-06 20:04:54,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:54,725 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 99 transitions. [2021-08-06 20:04:54,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 20:04:54,725 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:54,725 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:04:54,750 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 20:04:54,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:54,937 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:04:54,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:54,938 INFO L82 PathProgramCache]: Analyzing trace with hash 268460145, now seen corresponding path program 8 times [2021-08-06 20:04:54,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:54,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614264314] [2021-08-06 20:04:54,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:54,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:54,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:55,112 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:04:55,118 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:04:55,144 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:04:55,148 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:04:55,174 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:04:55,187 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:04:55,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:55,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:55,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614264314] [2021-08-06 20:04:55,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614264314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:55,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944308098] [2021-08-06 20:04:55,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:04:55,239 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:55,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:55,240 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 20:04:55,240 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 20:04:55,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:04:55,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:04:55,497 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:04:55,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:04:55,748 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:04:55,750 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:04:55,861 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:04:55,866 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:04:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:56,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944308098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:56,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:04:56,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 20:04:56,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449948535] [2021-08-06 20:04:56,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:04:56,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:56,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:04:56,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:04:56,010 INFO L87 Difference]: Start difference. First operand 64 states and 99 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:57,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:57,141 INFO L93 Difference]: Finished difference Result 151 states and 210 transitions. [2021-08-06 20:04:57,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 20:04:57,141 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 20:04:57,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:57,142 INFO L225 Difference]: With dead ends: 151 [2021-08-06 20:04:57,142 INFO L226 Difference]: Without dead ends: 127 [2021-08-06 20:04:57,142 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 999.9ms TimeCoverageRelationStatistics Valid=435, Invalid=2645, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 20:04:57,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-08-06 20:04:57,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 76. [2021-08-06 20:04:57,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.6133333333333333) internal successors, (121), 75 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 20:04:57,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 121 transitions. [2021-08-06 20:04:57,147 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 121 transitions. Word has length 23 [2021-08-06 20:04:57,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:57,147 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 121 transitions. [2021-08-06 20:04:57,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:57,147 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 121 transitions. [2021-08-06 20:04:57,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 20:04:57,150 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:57,150 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:04:57,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 20:04:57,355 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,SelfDestructingSolverStorable9 [2021-08-06 20:04:57,355 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:04:57,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:57,355 INFO L82 PathProgramCache]: Analyzing trace with hash -749483919, now seen corresponding path program 9 times [2021-08-06 20:04:57,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:57,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183294385] [2021-08-06 20:04:57,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:57,356 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:57,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:57,471 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:04:57,475 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:04:57,504 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 27.7 percent of original size [2021-08-06 20:04:57,508 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 27.7 percent of original size [2021-08-06 20:04:57,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:57,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:57,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183294385] [2021-08-06 20:04:57,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183294385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:57,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281142775] [2021-08-06 20:04:57,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:04:57,578 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:57,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:57,578 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 20:04:57,579 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 20:04:57,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:04:57,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:04:57,876 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:04:57,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:04:58,125 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:04:58,127 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:04:58,191 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:04:58,194 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:04:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:58,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281142775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:58,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:04:58,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 20:04:58,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514303533] [2021-08-06 20:04:58,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:04:58,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:58,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:04:58,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:04:58,461 INFO L87 Difference]: Start difference. First operand 76 states and 121 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:59,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:59,437 INFO L93 Difference]: Finished difference Result 127 states and 182 transitions. [2021-08-06 20:04:59,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 20:04:59,437 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 20:04:59,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:59,438 INFO L225 Difference]: With dead ends: 127 [2021-08-06 20:04:59,438 INFO L226 Difference]: Without dead ends: 113 [2021-08-06 20:04:59,439 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 1010.1ms TimeCoverageRelationStatistics Valid=494, Invalid=2586, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 20:04:59,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-08-06 20:04:59,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 72. [2021-08-06 20:04:59,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.619718309859155) internal successors, (115), 71 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:59,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 115 transitions. [2021-08-06 20:04:59,443 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 115 transitions. Word has length 23 [2021-08-06 20:04:59,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:59,443 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 115 transitions. [2021-08-06 20:04:59,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:59,443 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 115 transitions. [2021-08-06 20:04:59,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 20:04:59,444 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:59,444 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:04:59,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 20:04:59,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:59,653 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:04:59,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:59,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1592635441, now seen corresponding path program 10 times [2021-08-06 20:04:59,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:59,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657957109] [2021-08-06 20:04:59,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:59,654 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:59,705 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 31.5 percent of original size [2021-08-06 20:04:59,708 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 31.5 percent of original size [2021-08-06 20:04:59,740 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 32.0 percent of original size [2021-08-06 20:04:59,744 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 32.0 percent of original size [2021-08-06 20:04:59,808 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 60.0 percent of original size [2021-08-06 20:04:59,811 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 60.0 percent of original size [2021-08-06 20:04:59,831 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 55.6 percent of original size [2021-08-06 20:04:59,833 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 55.6 percent of original size [2021-08-06 20:04:59,853 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 51.5 percent of original size [2021-08-06 20:04:59,855 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 51.5 percent of original size [2021-08-06 20:04:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:59,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:59,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657957109] [2021-08-06 20:04:59,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657957109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:59,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177932300] [2021-08-06 20:04:59,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:04:59,900 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:59,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:59,901 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 20:04:59,907 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 20:05:00,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:05:00,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:05:00,236 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:05:00,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:05:00,449 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:00,452 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:00,610 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:00,613 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:00,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177932300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:00,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:05:00,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 20:05:00,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667812038] [2021-08-06 20:05:00,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:05:00,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:05:00,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:05:00,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:05:00,752 INFO L87 Difference]: Start difference. First operand 72 states and 115 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:02,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:05:02,099 INFO L93 Difference]: Finished difference Result 159 states and 233 transitions. [2021-08-06 20:05:02,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 20:05:02,100 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 20:05:02,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:05:02,100 INFO L225 Difference]: With dead ends: 159 [2021-08-06 20:05:02,100 INFO L226 Difference]: Without dead ends: 133 [2021-08-06 20:05:02,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 1296.7ms TimeCoverageRelationStatistics Valid=470, Invalid=2722, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 20:05:02,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-08-06 20:05:02,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 91. [2021-08-06 20:05:02,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.6444444444444444) internal successors, (148), 90 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:02,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 148 transitions. [2021-08-06 20:05:02,104 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 148 transitions. Word has length 23 [2021-08-06 20:05:02,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:05:02,104 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 148 transitions. [2021-08-06 20:05:02,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:02,104 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 148 transitions. [2021-08-06 20:05:02,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 20:05:02,105 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:05:02,105 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:05:02,123 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 20:05:02,313 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,SelfDestructingSolverStorable11 [2021-08-06 20:05:02,313 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:05:02,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:05:02,315 INFO L82 PathProgramCache]: Analyzing trace with hash 574691377, now seen corresponding path program 11 times [2021-08-06 20:05:02,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:05:02,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947696013] [2021-08-06 20:05:02,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:05:02,315 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:05:02,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:02,437 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 31.5 percent of original size [2021-08-06 20:05:02,441 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 31.5 percent of original size [2021-08-06 20:05:02,464 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 32.0 percent of original size [2021-08-06 20:05:02,474 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 32.0 percent of original size [2021-08-06 20:05:02,528 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 60.0 percent of original size [2021-08-06 20:05:02,530 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 60.0 percent of original size [2021-08-06 20:05:02,553 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 57.9 percent of original size [2021-08-06 20:05:02,554 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 57.9 percent of original size [2021-08-06 20:05:02,621 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:02,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:05:02,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947696013] [2021-08-06 20:05:02,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947696013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:02,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488696596] [2021-08-06 20:05:02,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:05:02,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:02,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:05:02,622 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 20:05:02,622 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 20:05:02,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:05:02,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:05:02,993 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:05:02,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:05:03,228 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:03,232 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:03,342 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:03,345 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:03,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:03,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488696596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:03,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:05:03,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 20:05:03,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823838493] [2021-08-06 20:05:03,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:05:03,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:05:03,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:05:03,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:05:03,578 INFO L87 Difference]: Start difference. First operand 91 states and 148 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:04,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:05:04,926 INFO L93 Difference]: Finished difference Result 154 states and 232 transitions. [2021-08-06 20:05:04,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 20:05:04,927 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 20:05:04,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:05:04,927 INFO L225 Difference]: With dead ends: 154 [2021-08-06 20:05:04,928 INFO L226 Difference]: Without dead ends: 144 [2021-08-06 20:05:04,928 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 1317.0ms TimeCoverageRelationStatistics Valid=537, Invalid=2655, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 20:05:04,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-08-06 20:05:04,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 87. [2021-08-06 20:05:04,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.6511627906976745) internal successors, (142), 86 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:04,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 142 transitions. [2021-08-06 20:05:04,931 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 142 transitions. Word has length 23 [2021-08-06 20:05:04,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:05:04,931 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 142 transitions. [2021-08-06 20:05:04,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:04,931 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 142 transitions. [2021-08-06 20:05:04,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 20:05:04,931 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:05:04,932 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:05:04,949 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 20:05:05,140 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,SelfDestructingSolverStorable12 [2021-08-06 20:05:05,141 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:05:05,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:05:05,141 INFO L82 PathProgramCache]: Analyzing trace with hash -2140300501, now seen corresponding path program 12 times [2021-08-06 20:05:05,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:05:05,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732777090] [2021-08-06 20:05:05,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:05:05,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:05:05,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:05,309 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 20:05:05,310 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 20:05:05,343 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 20:05:05,345 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 20:05:05,366 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:05:05,369 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:05:05,384 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 20:05:05,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:05:05,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732777090] [2021-08-06 20:05:05,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732777090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:05,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623812019] [2021-08-06 20:05:05,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:05:05,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:05,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:05:05,385 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 20:05:05,386 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 20:05:05,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:05:05,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:05:05,837 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:05:05,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:05:06,116 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:06,122 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:06,213 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 55.6 percent of original size [2021-08-06 20:05:06,216 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 55.6 percent of original size [2021-08-06 20:05:06,509 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:06,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623812019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:06,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:05:06,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-06 20:05:06,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872220559] [2021-08-06 20:05:06,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 20:05:06,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:05:06,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 20:05:06,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:05:06,511 INFO L87 Difference]: Start difference. First operand 87 states and 142 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:07,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:05:07,460 INFO L93 Difference]: Finished difference Result 186 states and 276 transitions. [2021-08-06 20:05:07,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 20:05:07,460 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 20:05:07,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:05:07,461 INFO L225 Difference]: With dead ends: 186 [2021-08-06 20:05:07,461 INFO L226 Difference]: Without dead ends: 174 [2021-08-06 20:05:07,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1019.2ms TimeCoverageRelationStatistics Valid=369, Invalid=2081, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 20:05:07,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-08-06 20:05:07,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 103. [2021-08-06 20:05:07,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.6764705882352942) internal successors, (171), 102 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:07,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 171 transitions. [2021-08-06 20:05:07,464 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 171 transitions. Word has length 25 [2021-08-06 20:05:07,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:05:07,464 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 171 transitions. [2021-08-06 20:05:07,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:07,465 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 171 transitions. [2021-08-06 20:05:07,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 20:05:07,465 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:05:07,465 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:05:07,485 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 20:05:07,680 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,SelfDestructingSolverStorable13 [2021-08-06 20:05:07,681 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:05:07,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:05:07,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1167606451, now seen corresponding path program 13 times [2021-08-06 20:05:07,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:05:07,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808959944] [2021-08-06 20:05:07,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:05:07,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:05:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:07,800 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 20:05:07,801 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 20:05:07,822 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 20:05:07,823 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 20:05:07,840 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:05:07,841 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:05:07,856 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 20:05:07,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:05:07,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808959944] [2021-08-06 20:05:07,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808959944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:07,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582244187] [2021-08-06 20:05:07,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:05:07,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:07,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:05:07,857 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 20:05:07,858 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 20:05:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:08,317 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:05:08,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:05:08,543 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:05:08,554 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:05:08,615 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:08,619 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:08,918 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:08,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582244187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:08,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:05:08,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-06 20:05:08,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568665827] [2021-08-06 20:05:08,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:05:08,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:05:08,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:05:08,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:05:08,919 INFO L87 Difference]: Start difference. First operand 103 states and 171 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:10,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:05:10,559 INFO L93 Difference]: Finished difference Result 273 states and 410 transitions. [2021-08-06 20:05:10,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-06 20:05:10,560 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 20:05:10,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:05:10,561 INFO L225 Difference]: With dead ends: 273 [2021-08-06 20:05:10,561 INFO L226 Difference]: Without dead ends: 247 [2021-08-06 20:05:10,562 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1778 ImplicationChecksByTransitivity, 1546.1ms TimeCoverageRelationStatistics Valid=800, Invalid=4602, Unknown=0, NotChecked=0, Total=5402 [2021-08-06 20:05:10,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-08-06 20:05:10,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 111. [2021-08-06 20:05:10,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.6727272727272726) internal successors, (184), 110 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:10,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 184 transitions. [2021-08-06 20:05:10,565 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 184 transitions. Word has length 25 [2021-08-06 20:05:10,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:05:10,565 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 184 transitions. [2021-08-06 20:05:10,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:10,565 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 184 transitions. [2021-08-06 20:05:10,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 20:05:10,566 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:05:10,566 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:05:10,592 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 20:05:10,789 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,SelfDestructingSolverStorable14 [2021-08-06 20:05:10,789 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:05:10,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:05:10,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1610160841, now seen corresponding path program 14 times [2021-08-06 20:05:10,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:05:10,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131032010] [2021-08-06 20:05:10,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:05:10,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:05:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:10,852 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:05:10,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:05:10,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131032010] [2021-08-06 20:05:10,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131032010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:10,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137665232] [2021-08-06 20:05:10,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:05:10,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:10,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:05:10,861 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 20:05:10,871 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 20:05:11,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:05:11,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:05:11,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 20:05:11,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:05:11,431 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:05:11,434 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:05:11,556 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:05:11,558 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:05:11,574 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 20:05:11,576 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 20:05:11,580 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:05:11,581 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:05:11,600 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:05:11,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137665232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:11,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:05:11,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-06 20:05:11,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505371320] [2021-08-06 20:05:11,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 20:05:11,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:05:11,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 20:05:11,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:05:11,601 INFO L87 Difference]: Start difference. First operand 111 states and 184 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 20:05:11,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:05:11,643 INFO L93 Difference]: Finished difference Result 176 states and 295 transitions. [2021-08-06 20:05:11,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 20:05:11,643 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 25 [2021-08-06 20:05:11,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:05:11,644 INFO L225 Difference]: With dead ends: 176 [2021-08-06 20:05:11,644 INFO L226 Difference]: Without dead ends: 162 [2021-08-06 20:05:11,644 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:05:11,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-08-06 20:05:11,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 135. [2021-08-06 20:05:11,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.6791044776119404) internal successors, (225), 134 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:11,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 225 transitions. [2021-08-06 20:05:11,646 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 225 transitions. Word has length 25 [2021-08-06 20:05:11,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:05:11,646 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 225 transitions. [2021-08-06 20:05:11,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 20:05:11,647 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 225 transitions. [2021-08-06 20:05:11,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:05:11,647 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:05:11,647 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:05:11,666 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 20:05:11,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:11,866 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:05:11,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:05:11,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1186682127, now seen corresponding path program 15 times [2021-08-06 20:05:11,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:05:11,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836176651] [2021-08-06 20:05:11,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:05:11,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:05:11,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:12,016 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:05:12,024 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:05:12,055 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:05:12,058 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:05:12,126 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:12,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:05:12,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836176651] [2021-08-06 20:05:12,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836176651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:12,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872609759] [2021-08-06 20:05:12,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:05:12,126 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:12,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:05:12,127 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 20:05:12,128 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 20:05:12,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:05:12,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:05:12,648 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 20:05:12,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:05:13,222 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:05:13,225 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:05:13,267 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:05:13,270 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:05:13,346 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:13,353 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:13,563 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:13,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872609759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:13,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:05:13,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-06 20:05:13,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642719962] [2021-08-06 20:05:13,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 20:05:13,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:05:13,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 20:05:13,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:05:13,566 INFO L87 Difference]: Start difference. First operand 135 states and 225 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:14,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:05:14,802 INFO L93 Difference]: Finished difference Result 250 states and 386 transitions. [2021-08-06 20:05:14,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-06 20:05:14,802 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 20:05:14,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:05:14,803 INFO L225 Difference]: With dead ends: 250 [2021-08-06 20:05:14,803 INFO L226 Difference]: Without dead ends: 226 [2021-08-06 20:05:14,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 1296.0ms TimeCoverageRelationStatistics Valid=479, Invalid=3181, Unknown=0, NotChecked=0, Total=3660 [2021-08-06 20:05:14,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-08-06 20:05:14,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 170. [2021-08-06 20:05:14,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.727810650887574) internal successors, (292), 169 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:14,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 292 transitions. [2021-08-06 20:05:14,807 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 292 transitions. Word has length 27 [2021-08-06 20:05:14,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:05:14,807 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 292 transitions. [2021-08-06 20:05:14,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:14,807 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 292 transitions. [2021-08-06 20:05:14,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:05:14,808 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:05:14,808 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:05:14,825 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 20:05:15,008 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,SelfDestructingSolverStorable16 [2021-08-06 20:05:15,008 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:05:15,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:05:15,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1420038897, now seen corresponding path program 16 times [2021-08-06 20:05:15,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:05:15,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186167836] [2021-08-06 20:05:15,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:05:15,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:05:15,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:15,139 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:05:15,142 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:05:15,180 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:05:15,183 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:05:15,235 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:15,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:05:15,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186167836] [2021-08-06 20:05:15,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186167836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:15,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118467370] [2021-08-06 20:05:15,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:05:15,235 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:15,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:05:15,236 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 20:05:15,237 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 20:05:15,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:05:15,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:05:15,780 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 20:05:15,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:05:16,089 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:05:16,100 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:05:16,212 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:05:16,215 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:05:16,283 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:16,286 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:16,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:16,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118467370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:16,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:05:16,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-06 20:05:16,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553244407] [2021-08-06 20:05:16,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 20:05:16,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:05:16,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 20:05:16,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:05:16,425 INFO L87 Difference]: Start difference. First operand 170 states and 292 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:17,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:05:17,565 INFO L93 Difference]: Finished difference Result 261 states and 401 transitions. [2021-08-06 20:05:17,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-06 20:05:17,571 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 20:05:17,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:05:17,572 INFO L225 Difference]: With dead ends: 261 [2021-08-06 20:05:17,572 INFO L226 Difference]: Without dead ends: 241 [2021-08-06 20:05:17,573 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1237 ImplicationChecksByTransitivity, 1172.5ms TimeCoverageRelationStatistics Valid=564, Invalid=3726, Unknown=0, NotChecked=0, Total=4290 [2021-08-06 20:05:17,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-08-06 20:05:17,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 172. [2021-08-06 20:05:17,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.7251461988304093) internal successors, (295), 171 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:17,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 295 transitions. [2021-08-06 20:05:17,576 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 295 transitions. Word has length 27 [2021-08-06 20:05:17,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:05:17,576 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 295 transitions. [2021-08-06 20:05:17,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:17,576 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 295 transitions. [2021-08-06 20:05:17,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:05:17,577 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:05:17,577 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:05:17,594 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 20:05:17,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-06 20:05:17,794 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:05:17,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:05:17,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1866630415, now seen corresponding path program 17 times [2021-08-06 20:05:17,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:05:17,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405718834] [2021-08-06 20:05:17,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:05:17,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:05:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:18,257 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:05:18,313 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:05:18,467 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:05:18,471 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:05:18,525 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:05:18,528 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:05:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:18,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:05:18,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405718834] [2021-08-06 20:05:18,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405718834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:18,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062259083] [2021-08-06 20:05:18,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:05:18,585 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:18,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:05:18,586 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 20:05:18,587 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 20:05:19,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:05:19,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:05:19,165 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 20:05:19,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:05:19,454 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:05:19,456 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:05:19,498 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:05:19,500 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:05:19,611 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:19,613 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:19,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062259083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:19,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:05:19,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-06 20:05:19,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007229293] [2021-08-06 20:05:19,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 20:05:19,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:05:19,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 20:05:19,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:05:19,771 INFO L87 Difference]: Start difference. First operand 172 states and 295 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:21,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:05:21,590 INFO L93 Difference]: Finished difference Result 288 states and 442 transitions. [2021-08-06 20:05:21,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-06 20:05:21,591 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 20:05:21,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:05:21,591 INFO L225 Difference]: With dead ends: 288 [2021-08-06 20:05:21,591 INFO L226 Difference]: Without dead ends: 264 [2021-08-06 20:05:21,592 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 1872.0ms TimeCoverageRelationStatistics Valid=639, Invalid=4191, Unknown=0, NotChecked=0, Total=4830 [2021-08-06 20:05:21,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-08-06 20:05:21,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 180. [2021-08-06 20:05:21,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.7262569832402235) internal successors, (309), 179 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:21,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 309 transitions. [2021-08-06 20:05:21,596 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 309 transitions. Word has length 27 [2021-08-06 20:05:21,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:05:21,596 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 309 transitions. [2021-08-06 20:05:21,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:21,596 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 309 transitions. [2021-08-06 20:05:21,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:05:21,597 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:05:21,597 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:05:21,614 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 20:05:21,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:21,805 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:05:21,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:05:21,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1410392817, now seen corresponding path program 18 times [2021-08-06 20:05:21,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:05:21,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084256219] [2021-08-06 20:05:21,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:05:21,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:05:21,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:22,001 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 50, result has 65.8 percent of original size [2021-08-06 20:05:22,008 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 50, result has 65.8 percent of original size [2021-08-06 20:05:22,049 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 50, result has 66.2 percent of original size [2021-08-06 20:05:22,059 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 50, result has 66.2 percent of original size [2021-08-06 20:05:22,344 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:22,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:05:22,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084256219] [2021-08-06 20:05:22,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084256219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:22,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326700563] [2021-08-06 20:05:22,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:05:22,344 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:22,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:05:22,345 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 20:05:22,346 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 20:05:23,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:05:23,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:05:23,051 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 20:05:23,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:05:23,473 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:05:23,475 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:05:23,527 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:05:23,537 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:05:23,607 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:23,610 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:23,826 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:23,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326700563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:23,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:05:23,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-06 20:05:23,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737842454] [2021-08-06 20:05:23,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 20:05:23,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:05:23,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 20:05:23,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:05:23,827 INFO L87 Difference]: Start difference. First operand 180 states and 309 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:25,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:05:25,448 INFO L93 Difference]: Finished difference Result 266 states and 418 transitions. [2021-08-06 20:05:25,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-06 20:05:25,449 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 20:05:25,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:05:25,449 INFO L225 Difference]: With dead ends: 266 [2021-08-06 20:05:25,449 INFO L226 Difference]: Without dead ends: 256 [2021-08-06 20:05:25,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 1644.2ms TimeCoverageRelationStatistics Valid=691, Invalid=3865, Unknown=0, NotChecked=0, Total=4556 [2021-08-06 20:05:25,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-08-06 20:05:25,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 180. [2021-08-06 20:05:25,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.7262569832402235) internal successors, (309), 179 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:25,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 309 transitions. [2021-08-06 20:05:25,455 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 309 transitions. Word has length 27 [2021-08-06 20:05:25,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:05:25,455 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 309 transitions. [2021-08-06 20:05:25,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:25,456 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 309 transitions. [2021-08-06 20:05:25,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:05:25,456 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:05:25,456 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:05:25,475 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 20:05:25,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:25,669 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:05:25,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:05:25,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1919706989, now seen corresponding path program 19 times [2021-08-06 20:05:25,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:05:25,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557705213] [2021-08-06 20:05:25,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:05:25,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:05:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:25,757 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 32.0 percent of original size [2021-08-06 20:05:25,761 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 32.0 percent of original size [2021-08-06 20:05:25,799 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 63.9 percent of original size [2021-08-06 20:05:25,801 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 63.9 percent of original size [2021-08-06 20:05:25,818 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 59.4 percent of original size [2021-08-06 20:05:25,820 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 59.4 percent of original size [2021-08-06 20:05:25,897 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:25,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:05:25,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557705213] [2021-08-06 20:05:25,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557705213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:25,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492753289] [2021-08-06 20:05:25,898 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:05:25,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:25,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:05:25,901 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 20:05:25,935 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 20:05:26,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:26,611 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 20:05:26,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:05:26,895 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:26,898 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:26,952 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:26,955 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:27,107 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:27,109 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:27,256 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:27,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492753289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:27,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:05:27,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-06 20:05:27,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912369633] [2021-08-06 20:05:27,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 20:05:27,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:05:27,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 20:05:27,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:05:27,257 INFO L87 Difference]: Start difference. First operand 180 states and 309 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:29,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:05:29,120 INFO L93 Difference]: Finished difference Result 286 states and 450 transitions. [2021-08-06 20:05:29,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-06 20:05:29,121 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 20:05:29,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:05:29,121 INFO L225 Difference]: With dead ends: 286 [2021-08-06 20:05:29,121 INFO L226 Difference]: Without dead ends: 268 [2021-08-06 20:05:29,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1580 ImplicationChecksByTransitivity, 1744.1ms TimeCoverageRelationStatistics Valid=699, Invalid=4413, Unknown=0, NotChecked=0, Total=5112 [2021-08-06 20:05:29,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-08-06 20:05:29,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 182. [2021-08-06 20:05:29,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.707182320441989) internal successors, (309), 181 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:29,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 309 transitions. [2021-08-06 20:05:29,126 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 309 transitions. Word has length 27 [2021-08-06 20:05:29,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:05:29,126 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 309 transitions. [2021-08-06 20:05:29,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:29,126 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 309 transitions. [2021-08-06 20:05:29,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:05:29,127 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:05:29,127 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:05:29,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-08-06 20:05:29,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:29,337 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:05:29,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:05:29,337 INFO L82 PathProgramCache]: Analyzing trace with hash -679312537, now seen corresponding path program 20 times [2021-08-06 20:05:29,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:05:29,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046486706] [2021-08-06 20:05:29,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:05:29,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:05:29,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:29,517 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 20:05:29,519 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 20:05:29,540 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 20:05:29,541 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 20:05:29,559 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:05:29,560 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:05:29,576 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:29,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:05:29,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046486706] [2021-08-06 20:05:29,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046486706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:29,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112295923] [2021-08-06 20:05:29,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:05:29,576 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:29,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:05:29,577 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 20:05:29,578 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 20:05:30,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:05:30,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:05:30,298 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 20:05:30,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:05:30,619 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:30,623 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:30,676 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:30,679 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:30,779 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 55.6 percent of original size [2021-08-06 20:05:30,782 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 55.6 percent of original size [2021-08-06 20:05:31,025 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:31,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112295923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:31,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:05:31,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-08-06 20:05:31,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424276622] [2021-08-06 20:05:31,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 20:05:31,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:05:31,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 20:05:31,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:05:31,026 INFO L87 Difference]: Start difference. First operand 182 states and 309 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:32,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:05:32,294 INFO L93 Difference]: Finished difference Result 341 states and 531 transitions. [2021-08-06 20:05:32,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 20:05:32,295 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 20:05:32,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:05:32,297 INFO L225 Difference]: With dead ends: 341 [2021-08-06 20:05:32,297 INFO L226 Difference]: Without dead ends: 325 [2021-08-06 20:05:32,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 1108.9ms TimeCoverageRelationStatistics Valid=565, Invalid=3467, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 20:05:32,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-08-06 20:05:32,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 199. [2021-08-06 20:05:32,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.7121212121212122) internal successors, (339), 198 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:32,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 339 transitions. [2021-08-06 20:05:32,301 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 339 transitions. Word has length 29 [2021-08-06 20:05:32,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:05:32,301 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 339 transitions. [2021-08-06 20:05:32,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:32,302 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 339 transitions. [2021-08-06 20:05:32,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:05:32,302 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:05:32,302 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:05:32,332 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 20:05:32,516 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,SelfDestructingSolverStorable21 [2021-08-06 20:05:32,517 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:05:32,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:05:32,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1955021517, now seen corresponding path program 21 times [2021-08-06 20:05:32,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:05:32,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775206102] [2021-08-06 20:05:32,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:05:32,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:05:32,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:32,655 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 20:05:32,656 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 20:05:32,676 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 20:05:32,678 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 20:05:32,695 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:05:32,696 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:05:32,711 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:32,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:05:32,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775206102] [2021-08-06 20:05:32,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775206102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:32,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348231089] [2021-08-06 20:05:32,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:05:32,711 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:32,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:05:32,712 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 20:05:32,725 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 20:05:33,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 20:05:33,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:05:33,478 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 20:05:33,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:05:33,727 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:05:33,732 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:05:33,790 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:05:33,792 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:05:33,858 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:33,861 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:34,163 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:34,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348231089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:34,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:05:34,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-08-06 20:05:34,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214160103] [2021-08-06 20:05:34,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 20:05:34,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:05:34,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 20:05:34,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:05:34,164 INFO L87 Difference]: Start difference. First operand 199 states and 339 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:37,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:05:37,190 INFO L93 Difference]: Finished difference Result 494 states and 775 transitions. [2021-08-06 20:05:37,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-08-06 20:05:37,190 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 20:05:37,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:05:37,201 INFO L225 Difference]: With dead ends: 494 [2021-08-06 20:05:37,201 INFO L226 Difference]: Without dead ends: 464 [2021-08-06 20:05:37,202 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3035 ImplicationChecksByTransitivity, 2514.1ms TimeCoverageRelationStatistics Valid=1183, Invalid=7559, Unknown=0, NotChecked=0, Total=8742 [2021-08-06 20:05:37,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-08-06 20:05:37,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 232. [2021-08-06 20:05:37,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.7445887445887447) internal successors, (403), 231 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:37,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 403 transitions. [2021-08-06 20:05:37,213 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 403 transitions. Word has length 29 [2021-08-06 20:05:37,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:05:37,213 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 403 transitions. [2021-08-06 20:05:37,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:37,214 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 403 transitions. [2021-08-06 20:05:37,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:05:37,214 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:05:37,214 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:05:37,235 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 20:05:37,414 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,SelfDestructingSolverStorable22 [2021-08-06 20:05:37,415 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:05:37,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:05:37,415 INFO L82 PathProgramCache]: Analyzing trace with hash -2027719309, now seen corresponding path program 22 times [2021-08-06 20:05:37,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:05:37,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802388713] [2021-08-06 20:05:37,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:05:37,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:05:37,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:37,485 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:05:37,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:05:37,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802388713] [2021-08-06 20:05:37,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802388713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:37,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693431722] [2021-08-06 20:05:37,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:05:37,485 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:37,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:05:37,486 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 20:05:37,486 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 20:05:38,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:05:38,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:05:38,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 20:05:38,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:05:38,403 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:05:38,404 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:05:38,466 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:05:38,467 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:05:38,489 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:05:38,490 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:05:38,506 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 20:05:38,508 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 20:05:38,512 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:05:38,513 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:05:38,529 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:05:38,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693431722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:38,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:05:38,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-06 20:05:38,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448579650] [2021-08-06 20:05:38,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:05:38,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:05:38,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:05:38,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:05:38,530 INFO L87 Difference]: Start difference. First operand 232 states and 403 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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 20:05:38,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:05:38,609 INFO L93 Difference]: Finished difference Result 322 states and 557 transitions. [2021-08-06 20:05:38,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:05:38,609 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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 29 [2021-08-06 20:05:38,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:05:38,610 INFO L225 Difference]: With dead ends: 322 [2021-08-06 20:05:38,610 INFO L226 Difference]: Without dead ends: 300 [2021-08-06 20:05:38,610 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:05:38,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-08-06 20:05:38,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 241. [2021-08-06 20:05:38,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.7166666666666666) internal successors, (412), 240 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:38,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 412 transitions. [2021-08-06 20:05:38,614 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 412 transitions. Word has length 29 [2021-08-06 20:05:38,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:05:38,614 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 412 transitions. [2021-08-06 20:05:38,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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 20:05:38,614 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 412 transitions. [2021-08-06 20:05:38,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:05:38,615 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:05:38,615 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:05:38,640 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 20:05:38,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:38,833 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:05:38,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:05:38,833 INFO L82 PathProgramCache]: Analyzing trace with hash 520696111, now seen corresponding path program 23 times [2021-08-06 20:05:38,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:05:38,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228121348] [2021-08-06 20:05:38,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:05:38,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:05:38,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:39,063 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 39.7 percent of original size [2021-08-06 20:05:39,069 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 39.7 percent of original size [2021-08-06 20:05:39,109 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 40.1 percent of original size [2021-08-06 20:05:39,121 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 40.1 percent of original size [2021-08-06 20:05:39,201 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 75.0 percent of original size [2021-08-06 20:05:39,203 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 75.0 percent of original size [2021-08-06 20:05:39,229 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 77.1 percent of original size [2021-08-06 20:05:39,243 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 77.1 percent of original size [2021-08-06 20:05:39,278 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 30, result has 48.3 percent of original size [2021-08-06 20:05:39,281 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 30, result has 48.3 percent of original size [2021-08-06 20:05:39,313 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 30, result has 43.4 percent of original size [2021-08-06 20:05:39,315 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 30, result has 43.4 percent of original size [2021-08-06 20:05:39,340 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 69.2 percent of original size [2021-08-06 20:05:39,342 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 69.2 percent of original size [2021-08-06 20:05:39,361 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 29.4 percent of original size [2021-08-06 20:05:39,362 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 29.4 percent of original size [2021-08-06 20:05:39,376 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:39,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:05:39,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228121348] [2021-08-06 20:05:39,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228121348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:39,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472622220] [2021-08-06 20:05:39,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:05:39,376 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:39,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:05:39,377 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 20:05:39,378 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 20:05:40,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:05:40,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:05:40,220 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-06 20:05:40,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:05:40,487 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 58.6 percent of original size [2021-08-06 20:05:40,490 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 58.6 percent of original size [2021-08-06 20:05:40,593 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 60.7 percent of original size [2021-08-06 20:05:40,604 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 60.7 percent of original size [2021-08-06 20:05:40,711 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 56.3 percent of original size [2021-08-06 20:05:40,717 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 56.3 percent of original size [2021-08-06 20:05:40,913 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 58.6 percent of original size [2021-08-06 20:05:40,916 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 58.6 percent of original size [2021-08-06 20:05:41,105 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:41,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472622220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:41,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:05:41,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-08-06 20:05:41,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445220733] [2021-08-06 20:05:41,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 20:05:41,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:05:41,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 20:05:41,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-08-06 20:05:41,106 INFO L87 Difference]: Start difference. First operand 241 states and 412 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:42,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:05:42,914 INFO L93 Difference]: Finished difference Result 262 states and 440 transitions. [2021-08-06 20:05:42,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:05:42,914 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 20:05:42,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:05:42,915 INFO L225 Difference]: With dead ends: 262 [2021-08-06 20:05:42,915 INFO L226 Difference]: Without dead ends: 252 [2021-08-06 20:05:42,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1258.1ms TimeCoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:05:42,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-08-06 20:05:42,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 244. [2021-08-06 20:05:42,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.7160493827160495) internal successors, (417), 243 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 20:05:42,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 417 transitions. [2021-08-06 20:05:42,919 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 417 transitions. Word has length 29 [2021-08-06 20:05:42,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:05:42,919 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 417 transitions. [2021-08-06 20:05:42,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:42,920 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 417 transitions. [2021-08-06 20:05:42,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:05:42,920 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:05:42,920 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:05:42,940 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 20:05:43,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:43,137 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:05:43,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:05:43,137 INFO L82 PathProgramCache]: Analyzing trace with hash 232047475, now seen corresponding path program 24 times [2021-08-06 20:05:43,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:05:43,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626036812] [2021-08-06 20:05:43,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:05:43,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:05:43,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:43,314 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 33.1 percent of original size [2021-08-06 20:05:43,318 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 33.1 percent of original size [2021-08-06 20:05:43,442 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 57.9 percent of original size [2021-08-06 20:05:43,444 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 57.9 percent of original size [2021-08-06 20:05:43,517 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 51.5 percent of original size [2021-08-06 20:05:43,519 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 51.5 percent of original size [2021-08-06 20:05:43,583 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:43,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:05:43,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626036812] [2021-08-06 20:05:43,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626036812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:43,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114645961] [2021-08-06 20:05:43,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:05:43,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:43,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:05:43,585 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 20:05:43,596 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 20:05:44,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 20:05:44,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:05:44,678 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-06 20:05:44,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:05:45,499 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:05:45,501 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:05:45,546 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:05:45,548 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:05:45,668 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 48.1 percent of original size [2021-08-06 20:05:45,671 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 48.1 percent of original size [2021-08-06 20:05:45,850 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:45,853 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:46,004 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:46,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114645961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:46,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:05:46,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-08-06 20:05:46,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043929173] [2021-08-06 20:05:46,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 20:05:46,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:05:46,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 20:05:46,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:05:46,005 INFO L87 Difference]: Start difference. First operand 244 states and 417 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:47,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:05:47,767 INFO L93 Difference]: Finished difference Result 314 states and 514 transitions. [2021-08-06 20:05:47,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-06 20:05:47,767 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 20:05:47,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:05:47,768 INFO L225 Difference]: With dead ends: 314 [2021-08-06 20:05:47,768 INFO L226 Difference]: Without dead ends: 294 [2021-08-06 20:05:47,768 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 1645.2ms TimeCoverageRelationStatistics Valid=397, Invalid=3143, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 20:05:47,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-08-06 20:05:47,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 238. [2021-08-06 20:05:47,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.7130801687763713) internal successors, (406), 237 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:47,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 406 transitions. [2021-08-06 20:05:47,772 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 406 transitions. Word has length 29 [2021-08-06 20:05:47,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:05:47,772 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 406 transitions. [2021-08-06 20:05:47,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:47,772 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 406 transitions. [2021-08-06 20:05:47,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:05:47,772 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:05:47,772 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:05:47,793 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 20:05:47,983 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,SelfDestructingSolverStorable25 [2021-08-06 20:05:47,983 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:05:47,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:05:47,983 INFO L82 PathProgramCache]: Analyzing trace with hash 530350387, now seen corresponding path program 25 times [2021-08-06 20:05:47,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:05:47,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906644129] [2021-08-06 20:05:47,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:05:47,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:05:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:48,402 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 100, result has 35.1 percent of original size [2021-08-06 20:05:48,407 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 100, result has 35.1 percent of original size [2021-08-06 20:05:48,442 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 89.2 percent of original size [2021-08-06 20:05:48,444 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 89.2 percent of original size [2021-08-06 20:05:48,473 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 88.9 percent of original size [2021-08-06 20:05:48,475 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 88.9 percent of original size [2021-08-06 20:05:48,516 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 87.9 percent of original size [2021-08-06 20:05:48,518 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 87.9 percent of original size [2021-08-06 20:05:48,675 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 48.8 percent of original size [2021-08-06 20:05:48,676 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 48.8 percent of original size [2021-08-06 20:05:48,728 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 42.1 percent of original size [2021-08-06 20:05:48,738 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 42.1 percent of original size [2021-08-06 20:05:48,880 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 50.0 percent of original size [2021-08-06 20:05:48,882 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 50.0 percent of original size [2021-08-06 20:05:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:48,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:05:48,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906644129] [2021-08-06 20:05:48,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906644129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:48,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120449554] [2021-08-06 20:05:48,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:05:48,963 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:48,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:05:48,972 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 20:05:49,020 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 20:05:49,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:49,989 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:05:49,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:05:50,281 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:05:50,292 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:05:50,579 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:50,585 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:50,669 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 48.1 percent of original size [2021-08-06 20:05:50,672 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 48.1 percent of original size [2021-08-06 20:05:51,549 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:51,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120449554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:51,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:05:51,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-08-06 20:05:51,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903646346] [2021-08-06 20:05:51,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:05:51,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:05:51,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:05:51,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:05:51,550 INFO L87 Difference]: Start difference. First operand 238 states and 406 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:54,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:05:54,414 INFO L93 Difference]: Finished difference Result 358 states and 584 transitions. [2021-08-06 20:05:54,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 20:05:54,415 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 20:05:54,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:05:54,416 INFO L225 Difference]: With dead ends: 358 [2021-08-06 20:05:54,416 INFO L226 Difference]: Without dead ends: 338 [2021-08-06 20:05:54,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 3007.6ms TimeCoverageRelationStatistics Valid=583, Invalid=3577, Unknown=0, NotChecked=0, Total=4160 [2021-08-06 20:05:54,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-08-06 20:05:54,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 254. [2021-08-06 20:05:54,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.715415019762846) internal successors, (434), 253 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:54,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 434 transitions. [2021-08-06 20:05:54,420 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 434 transitions. Word has length 29 [2021-08-06 20:05:54,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:05:54,420 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 434 transitions. [2021-08-06 20:05:54,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:54,420 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 434 transitions. [2021-08-06 20:05:54,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:05:54,420 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:05:54,421 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:05:54,472 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 20:05:54,633 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,SelfDestructingSolverStorable26 [2021-08-06 20:05:54,633 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:05:54,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:05:54,633 INFO L82 PathProgramCache]: Analyzing trace with hash -487593677, now seen corresponding path program 26 times [2021-08-06 20:05:54,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:05:54,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90904201] [2021-08-06 20:05:54,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:05:54,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:05:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:54,814 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 112, result has 27.3 percent of original size [2021-08-06 20:05:54,842 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 112, result has 27.3 percent of original size [2021-08-06 20:05:54,880 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 88.6 percent of original size [2021-08-06 20:05:54,882 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 88.6 percent of original size [2021-08-06 20:05:54,957 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 88.9 percent of original size [2021-08-06 20:05:54,993 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 88.9 percent of original size [2021-08-06 20:05:55,052 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 87.9 percent of original size [2021-08-06 20:05:55,055 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 87.9 percent of original size [2021-08-06 20:05:55,159 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 81.6 percent of original size [2021-08-06 20:05:55,162 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 81.6 percent of original size [2021-08-06 20:05:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:55,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:05:55,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90904201] [2021-08-06 20:05:55,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90904201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:55,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990328971] [2021-08-06 20:05:55,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:05:55,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:55,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:05:55,512 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 20:05:55,513 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 20:05:56,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:05:56,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:05:56,750 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:05:56,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:05:57,735 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:05:57,737 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:05:57,865 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:57,870 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:05:58,191 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 48.1 percent of original size [2021-08-06 20:05:58,194 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 48.1 percent of original size [2021-08-06 20:05:58,819 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:58,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990328971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:58,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:05:58,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-08-06 20:05:58,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495011821] [2021-08-06 20:05:58,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 20:05:58,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:05:58,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 20:05:58,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:05:58,821 INFO L87 Difference]: Start difference. First operand 254 states and 434 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:03,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:03,399 INFO L93 Difference]: Finished difference Result 356 states and 594 transitions. [2021-08-06 20:06:03,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-06 20:06:03,399 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 20:06:03,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:03,400 INFO L225 Difference]: With dead ends: 356 [2021-08-06 20:06:03,400 INFO L226 Difference]: Without dead ends: 344 [2021-08-06 20:06:03,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 5042.9ms TimeCoverageRelationStatistics Valid=741, Invalid=4809, Unknown=0, NotChecked=0, Total=5550 [2021-08-06 20:06:03,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-08-06 20:06:03,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 238. [2021-08-06 20:06:03,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.7172995780590716) internal successors, (407), 237 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:03,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 407 transitions. [2021-08-06 20:06:03,404 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 407 transitions. Word has length 29 [2021-08-06 20:06:03,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:03,404 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 407 transitions. [2021-08-06 20:06:03,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:03,404 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 407 transitions. [2021-08-06 20:06:03,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:06:03,404 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:03,405 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:03,445 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 20:06:03,632 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,SelfDestructingSolverStorable27 [2021-08-06 20:06:03,633 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:06:03,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:03,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1959636593, now seen corresponding path program 27 times [2021-08-06 20:06:03,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:03,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947714322] [2021-08-06 20:06:03,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:03,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:04,194 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 50, result has 65.8 percent of original size [2021-08-06 20:06:04,202 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 50, result has 65.8 percent of original size [2021-08-06 20:06:04,247 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 58, result has 60.8 percent of original size [2021-08-06 20:06:04,253 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 58, result has 60.8 percent of original size [2021-08-06 20:06:04,373 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:04,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:04,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947714322] [2021-08-06 20:06:04,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947714322] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:04,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495588436] [2021-08-06 20:06:04,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:06:04,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:04,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:04,377 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 20:06:04,404 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 20:06:05,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 20:06:05,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:05,731 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 20:06:05,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:06,457 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:06,459 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:06,502 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:06,504 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:06,561 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:06,563 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:06,633 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:06,636 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:06,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495588436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:06,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:06,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-06 20:06:06,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805172619] [2021-08-06 20:06:06,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:06:06,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:06,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:06:06,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:06:06,781 INFO L87 Difference]: Start difference. First operand 238 states and 407 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:08,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:08,336 INFO L93 Difference]: Finished difference Result 401 states and 644 transitions. [2021-08-06 20:06:08,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-06 20:06:08,336 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 20:06:08,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:08,338 INFO L225 Difference]: With dead ends: 401 [2021-08-06 20:06:08,338 INFO L226 Difference]: Without dead ends: 373 [2021-08-06 20:06:08,338 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 2055.0ms TimeCoverageRelationStatistics Valid=637, Invalid=4333, Unknown=0, NotChecked=0, Total=4970 [2021-08-06 20:06:08,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-08-06 20:06:08,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 298. [2021-08-06 20:06:08,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 1.760942760942761) internal successors, (523), 297 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:08,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 523 transitions. [2021-08-06 20:06:08,342 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 523 transitions. Word has length 31 [2021-08-06 20:06:08,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:08,342 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 523 transitions. [2021-08-06 20:06:08,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:08,343 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 523 transitions. [2021-08-06 20:06:08,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:06:08,343 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:08,343 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:08,376 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 20:06:08,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-06 20:06:08,545 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:06:08,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:08,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1242360207, now seen corresponding path program 28 times [2021-08-06 20:06:08,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:08,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958941454] [2021-08-06 20:06:08,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:08,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:08,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:08,976 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 50, result has 65.8 percent of original size [2021-08-06 20:06:08,983 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 50, result has 65.8 percent of original size [2021-08-06 20:06:09,025 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 58, result has 60.8 percent of original size [2021-08-06 20:06:09,032 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 58, result has 60.8 percent of original size [2021-08-06 20:06:09,110 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:09,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:09,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958941454] [2021-08-06 20:06:09,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958941454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:09,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562123009] [2021-08-06 20:06:09,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:06:09,111 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:09,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:09,111 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 20:06:09,125 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 20:06:10,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:06:10,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:10,369 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 20:06:10,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:10,719 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:10,721 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:10,808 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:10,810 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:10,853 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:10,856 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:10,926 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:10,928 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:11,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562123009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:11,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:11,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-06 20:06:11,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059242274] [2021-08-06 20:06:11,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:06:11,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:11,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:06:11,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:06:11,106 INFO L87 Difference]: Start difference. First operand 298 states and 523 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:12,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:12,741 INFO L93 Difference]: Finished difference Result 415 states and 663 transitions. [2021-08-06 20:06:12,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-06 20:06:12,741 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 20:06:12,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:12,742 INFO L225 Difference]: With dead ends: 415 [2021-08-06 20:06:12,742 INFO L226 Difference]: Without dead ends: 391 [2021-08-06 20:06:12,743 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 1704.3ms TimeCoverageRelationStatistics Valid=722, Invalid=4978, Unknown=0, NotChecked=0, Total=5700 [2021-08-06 20:06:12,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-08-06 20:06:12,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 300. [2021-08-06 20:06:12,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 1.7591973244147157) internal successors, (526), 299 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:12,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 526 transitions. [2021-08-06 20:06:12,763 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 526 transitions. Word has length 31 [2021-08-06 20:06:12,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:12,763 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 526 transitions. [2021-08-06 20:06:12,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:12,763 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 526 transitions. [2021-08-06 20:06:12,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:06:12,764 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:12,764 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:12,786 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 20:06:12,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:12,965 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:06:12,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:12,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1364360817, now seen corresponding path program 29 times [2021-08-06 20:06:12,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:12,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979638918] [2021-08-06 20:06:12,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:12,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:12,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:13,251 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 50, result has 65.8 percent of original size [2021-08-06 20:06:13,267 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 50, result has 65.8 percent of original size [2021-08-06 20:06:13,315 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 58, result has 60.8 percent of original size [2021-08-06 20:06:13,325 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 58, result has 60.8 percent of original size [2021-08-06 20:06:13,399 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:13,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:13,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979638918] [2021-08-06 20:06:13,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979638918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:13,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733592305] [2021-08-06 20:06:13,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:06:13,400 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:13,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:13,401 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 20:06:13,402 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 20:06:14,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 20:06:14,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:14,597 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 20:06:14,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:15,080 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:15,082 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:15,125 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:15,127 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:15,215 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:15,217 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:15,287 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:15,289 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:15,447 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:15,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733592305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:15,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:15,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-06 20:06:15,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414647044] [2021-08-06 20:06:15,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:06:15,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:15,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:06:15,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:06:15,450 INFO L87 Difference]: Start difference. First operand 300 states and 526 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:17,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:17,442 INFO L93 Difference]: Finished difference Result 414 states and 663 transitions. [2021-08-06 20:06:17,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-06 20:06:17,443 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 20:06:17,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:17,444 INFO L225 Difference]: With dead ends: 414 [2021-08-06 20:06:17,444 INFO L226 Difference]: Without dead ends: 394 [2021-08-06 20:06:17,445 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1909 ImplicationChecksByTransitivity, 1980.5ms TimeCoverageRelationStatistics Valid=821, Invalid=5659, Unknown=0, NotChecked=0, Total=6480 [2021-08-06 20:06:17,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-08-06 20:06:17,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 302. [2021-08-06 20:06:17,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 1.7574750830564785) internal successors, (529), 301 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:17,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 529 transitions. [2021-08-06 20:06:17,461 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 529 transitions. Word has length 31 [2021-08-06 20:06:17,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:17,461 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 529 transitions. [2021-08-06 20:06:17,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:17,461 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 529 transitions. [2021-08-06 20:06:17,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:06:17,462 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:17,462 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:17,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-06 20:06:17,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:17,673 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:06:17,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:17,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1922308495, now seen corresponding path program 30 times [2021-08-06 20:06:17,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:17,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174383945] [2021-08-06 20:06:17,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:17,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:17,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:18,209 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 50, result has 65.8 percent of original size [2021-08-06 20:06:18,217 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 50, result has 65.8 percent of original size [2021-08-06 20:06:18,261 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 50, result has 65.8 percent of original size [2021-08-06 20:06:18,267 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 50, result has 65.8 percent of original size [2021-08-06 20:06:18,309 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 58, result has 60.8 percent of original size [2021-08-06 20:06:18,315 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 58, result has 60.8 percent of original size [2021-08-06 20:06:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:18,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:18,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174383945] [2021-08-06 20:06:18,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174383945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:18,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201526052] [2021-08-06 20:06:18,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:06:18,387 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:18,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:18,387 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 20:06:18,388 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 20:06:19,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 20:06:19,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:19,596 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 20:06:19,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:19,916 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:19,918 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:19,961 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:19,963 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:20,245 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:20,247 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:20,394 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:20,396 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:20,540 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:20,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201526052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:20,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:20,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-06 20:06:20,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371845492] [2021-08-06 20:06:20,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:06:20,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:20,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:06:20,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:06:20,542 INFO L87 Difference]: Start difference. First operand 302 states and 529 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:23,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:23,286 INFO L93 Difference]: Finished difference Result 445 states and 709 transitions. [2021-08-06 20:06:23,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-06 20:06:23,286 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 20:06:23,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:23,287 INFO L225 Difference]: With dead ends: 445 [2021-08-06 20:06:23,287 INFO L226 Difference]: Without dead ends: 421 [2021-08-06 20:06:23,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 2767.1ms TimeCoverageRelationStatistics Valid=897, Invalid=6075, Unknown=0, NotChecked=0, Total=6972 [2021-08-06 20:06:23,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-08-06 20:06:23,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 310. [2021-08-06 20:06:23,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 1.7572815533980584) internal successors, (543), 309 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:23,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 543 transitions. [2021-08-06 20:06:23,292 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 543 transitions. Word has length 31 [2021-08-06 20:06:23,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:23,292 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 543 transitions. [2021-08-06 20:06:23,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:23,305 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 543 transitions. [2021-08-06 20:06:23,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:06:23,306 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:23,306 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:23,357 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 20:06:23,508 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,SelfDestructingSolverStorable31 [2021-08-06 20:06:23,509 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:06:23,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:23,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1354714737, now seen corresponding path program 31 times [2021-08-06 20:06:23,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:23,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035036111] [2021-08-06 20:06:23,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:23,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:23,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:23,711 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:06:23,715 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:06:23,782 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 27.7 percent of original size [2021-08-06 20:06:23,786 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 27.7 percent of original size [2021-08-06 20:06:23,869 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:23,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:23,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035036111] [2021-08-06 20:06:23,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035036111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:23,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757738365] [2021-08-06 20:06:23,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:06:23,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:23,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:23,872 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 20:06:23,873 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 20:06:25,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:25,210 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 20:06:25,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:26,254 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:26,257 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:26,298 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:26,301 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:26,343 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:26,346 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:26,414 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:26,416 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:26,892 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:26,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757738365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:26,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:26,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-06 20:06:26,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907490611] [2021-08-06 20:06:26,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:06:26,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:26,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:06:26,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:06:26,895 INFO L87 Difference]: Start difference. First operand 310 states and 543 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:29,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:29,013 INFO L93 Difference]: Finished difference Result 421 states and 684 transitions. [2021-08-06 20:06:29,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-06 20:06:29,013 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 20:06:29,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:29,015 INFO L225 Difference]: With dead ends: 421 [2021-08-06 20:06:29,015 INFO L226 Difference]: Without dead ends: 411 [2021-08-06 20:06:29,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1887 ImplicationChecksByTransitivity, 2099.5ms TimeCoverageRelationStatistics Valid=933, Invalid=5547, Unknown=0, NotChecked=0, Total=6480 [2021-08-06 20:06:29,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-08-06 20:06:29,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 310. [2021-08-06 20:06:29,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 1.7572815533980584) internal successors, (543), 309 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:29,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 543 transitions. [2021-08-06 20:06:29,023 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 543 transitions. Word has length 31 [2021-08-06 20:06:29,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:29,023 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 543 transitions. [2021-08-06 20:06:29,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:29,023 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 543 transitions. [2021-08-06 20:06:29,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:06:29,024 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:29,024 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:29,047 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 20:06:29,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:29,241 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:06:29,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:29,241 INFO L82 PathProgramCache]: Analyzing trace with hash -2097660947, now seen corresponding path program 32 times [2021-08-06 20:06:29,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:29,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764483724] [2021-08-06 20:06:29,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:29,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:29,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:29,692 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:06:29,696 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:06:29,726 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:06:29,729 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:06:29,795 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:29,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:29,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764483724] [2021-08-06 20:06:29,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764483724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:29,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426087887] [2021-08-06 20:06:29,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:06:29,795 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:29,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:29,796 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 20:06:29,798 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 20:06:31,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:06:31,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:31,100 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 20:06:31,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:31,417 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:31,419 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:31,500 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:31,502 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:31,688 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:31,690 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:31,760 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:31,763 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:31,897 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:31,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426087887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:31,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:31,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-06 20:06:31,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369182277] [2021-08-06 20:06:31,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:06:31,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:31,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:06:31,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:06:31,917 INFO L87 Difference]: Start difference. First operand 310 states and 543 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:33,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:33,514 INFO L93 Difference]: Finished difference Result 410 states and 667 transitions. [2021-08-06 20:06:33,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-06 20:06:33,514 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 20:06:33,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:33,515 INFO L225 Difference]: With dead ends: 410 [2021-08-06 20:06:33,516 INFO L226 Difference]: Without dead ends: 390 [2021-08-06 20:06:33,516 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1672 ImplicationChecksByTransitivity, 1664.3ms TimeCoverageRelationStatistics Valid=677, Invalid=5023, Unknown=0, NotChecked=0, Total=5700 [2021-08-06 20:06:33,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-08-06 20:06:33,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 314. [2021-08-06 20:06:33,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 1.7571884984025559) internal successors, (550), 313 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:33,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 550 transitions. [2021-08-06 20:06:33,520 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 550 transitions. Word has length 31 [2021-08-06 20:06:33,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:33,520 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 550 transitions. [2021-08-06 20:06:33,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:33,520 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 550 transitions. [2021-08-06 20:06:33,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:06:33,521 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:33,521 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:33,541 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 20:06:33,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:33,737 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:06:33,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:33,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1089362963, now seen corresponding path program 33 times [2021-08-06 20:06:33,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:33,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878515686] [2021-08-06 20:06:33,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:33,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:34,357 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:06:34,360 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:06:34,390 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:06:34,393 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:06:34,419 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:06:34,423 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:06:34,490 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:34,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:34,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878515686] [2021-08-06 20:06:34,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878515686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:34,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232760179] [2021-08-06 20:06:34,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:06:34,490 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:34,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:34,497 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 20:06:34,498 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 20:06:36,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 20:06:36,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:36,025 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 20:06:36,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:36,416 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:36,418 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:36,468 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:36,470 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:36,550 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:36,553 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:36,667 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:36,669 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:36,806 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:36,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232760179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:36,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:36,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-06 20:06:36,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458068040] [2021-08-06 20:06:36,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:06:36,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:36,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:06:36,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:06:36,808 INFO L87 Difference]: Start difference. First operand 314 states and 550 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:40,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:40,215 INFO L93 Difference]: Finished difference Result 452 states and 728 transitions. [2021-08-06 20:06:40,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-06 20:06:40,215 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 20:06:40,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:40,216 INFO L225 Difference]: With dead ends: 452 [2021-08-06 20:06:40,216 INFO L226 Difference]: Without dead ends: 426 [2021-08-06 20:06:40,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1880 ImplicationChecksByTransitivity, 2253.0ms TimeCoverageRelationStatistics Valid=786, Invalid=5534, Unknown=0, NotChecked=0, Total=6320 [2021-08-06 20:06:40,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-08-06 20:06:40,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 315. [2021-08-06 20:06:40,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 1.7484076433121019) internal successors, (549), 314 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:40,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 549 transitions. [2021-08-06 20:06:40,232 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 549 transitions. Word has length 31 [2021-08-06 20:06:40,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:40,232 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 549 transitions. [2021-08-06 20:06:40,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:40,232 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 549 transitions. [2021-08-06 20:06:40,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:06:40,233 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:40,233 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:40,258 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 20:06:40,436 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,SelfDestructingSolverStorable34 [2021-08-06 20:06:40,437 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:06:40,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:40,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1474834601, now seen corresponding path program 34 times [2021-08-06 20:06:40,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:40,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185366567] [2021-08-06 20:06:40,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:40,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:40,663 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 32.0 percent of original size [2021-08-06 20:06:40,666 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 32.0 percent of original size [2021-08-06 20:06:40,718 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 60.0 percent of original size [2021-08-06 20:06:40,720 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 60.0 percent of original size [2021-08-06 20:06:40,744 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 55.6 percent of original size [2021-08-06 20:06:40,746 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 55.6 percent of original size [2021-08-06 20:06:40,769 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 51.5 percent of original size [2021-08-06 20:06:40,770 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 51.5 percent of original size [2021-08-06 20:06:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:40,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:40,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185366567] [2021-08-06 20:06:40,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185366567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:40,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601724564] [2021-08-06 20:06:40,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:06:40,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:40,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:40,826 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 20:06:40,826 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 20:06:42,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:06:42,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:42,210 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 20:06:42,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:42,723 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:42,726 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:42,779 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:42,781 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:42,832 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:42,834 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:42,985 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:42,987 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:43,118 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:43,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601724564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:43,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:43,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-06 20:06:43,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439876783] [2021-08-06 20:06:43,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:06:43,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:43,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:06:43,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:06:43,133 INFO L87 Difference]: Start difference. First operand 315 states and 549 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:46,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:46,093 INFO L93 Difference]: Finished difference Result 456 states and 738 transitions. [2021-08-06 20:06:46,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-06 20:06:46,093 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 20:06:46,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:46,095 INFO L225 Difference]: With dead ends: 456 [2021-08-06 20:06:46,095 INFO L226 Difference]: Without dead ends: 438 [2021-08-06 20:06:46,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2441 ImplicationChecksByTransitivity, 3001.8ms TimeCoverageRelationStatistics Valid=912, Invalid=6744, Unknown=0, NotChecked=0, Total=7656 [2021-08-06 20:06:46,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-08-06 20:06:46,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 302. [2021-08-06 20:06:46,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 1.7209302325581395) internal successors, (518), 301 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:46,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 518 transitions. [2021-08-06 20:06:46,102 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 518 transitions. Word has length 31 [2021-08-06 20:06:46,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:46,102 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 518 transitions. [2021-08-06 20:06:46,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:46,103 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 518 transitions. [2021-08-06 20:06:46,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 20:06:46,117 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:46,117 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:46,162 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 20:06:46,320 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,SelfDestructingSolverStorable35 [2021-08-06 20:06:46,321 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:06:46,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:46,321 INFO L82 PathProgramCache]: Analyzing trace with hash -132907613, now seen corresponding path program 35 times [2021-08-06 20:06:46,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:46,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165677186] [2021-08-06 20:06:46,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:46,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:46,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:46,801 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 20:06:46,802 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 20:06:46,827 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 20:06:46,828 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 20:06:46,848 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:06:46,849 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:06:46,867 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:46,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:46,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165677186] [2021-08-06 20:06:46,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165677186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:46,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188331634] [2021-08-06 20:06:46,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:06:46,868 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:46,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:46,868 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 20:06:46,870 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 20:06:48,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 20:06:48,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:48,553 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-06 20:06:48,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:49,455 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:49,457 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:49,523 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:49,530 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:49,621 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:49,623 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:49,710 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 55.6 percent of original size [2021-08-06 20:06:49,713 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 55.6 percent of original size [2021-08-06 20:06:50,008 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:50,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188331634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:50,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:50,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-08-06 20:06:50,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950538380] [2021-08-06 20:06:50,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-06 20:06:50,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:50,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-06 20:06:50,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 20:06:50,010 INFO L87 Difference]: Start difference. First operand 302 states and 518 transitions. Second operand has 33 states, 33 states have (on average 1.9393939393939394) 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 20:06:52,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:52,950 INFO L93 Difference]: Finished difference Result 518 states and 825 transitions. [2021-08-06 20:06:52,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-08-06 20:06:52,951 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9393939393939394) 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) Word has length 33 [2021-08-06 20:06:52,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:52,952 INFO L225 Difference]: With dead ends: 518 [2021-08-06 20:06:52,952 INFO L226 Difference]: Without dead ends: 498 [2021-08-06 20:06:52,953 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 2675.7ms TimeCoverageRelationStatistics Valid=810, Invalid=5196, Unknown=0, NotChecked=0, Total=6006 [2021-08-06 20:06:52,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-08-06 20:06:52,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 323. [2021-08-06 20:06:52,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.7267080745341614) internal successors, (556), 322 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:52,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 556 transitions. [2021-08-06 20:06:52,969 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 556 transitions. Word has length 33 [2021-08-06 20:06:52,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:52,969 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 556 transitions. [2021-08-06 20:06:52,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9393939393939394) 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 20:06:52,969 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 556 transitions. [2021-08-06 20:06:52,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 20:06:52,970 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:52,970 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:52,996 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 20:06:53,184 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,SelfDestructingSolverStorable36 [2021-08-06 20:06:53,185 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:06:53,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:53,185 INFO L82 PathProgramCache]: Analyzing trace with hash 372918451, now seen corresponding path program 36 times [2021-08-06 20:06:53,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:53,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527537374] [2021-08-06 20:06:53,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:53,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:54,175 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 20:06:54,176 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 20:06:54,200 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 20:06:54,201 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 20:06:54,221 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:06:54,222 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:06:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:54,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:54,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527537374] [2021-08-06 20:06:54,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527537374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:54,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364967923] [2021-08-06 20:06:54,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:06:54,240 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:54,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:54,241 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 20:06:54,242 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 20:06:55,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 20:06:55,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:55,877 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-06 20:06:55,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:56,213 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:56,217 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:56,260 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:56,262 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:56,315 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:56,317 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:06:56,389 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:56,391 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:06:56,671 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:56,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364967923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:56,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:56,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-08-06 20:06:56,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111505954] [2021-08-06 20:06:56,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:06:56,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:56,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:06:56,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:06:56,673 INFO L87 Difference]: Start difference. First operand 323 states and 556 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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 20:06:59,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:59,556 INFO L93 Difference]: Finished difference Result 717 states and 1137 transitions. [2021-08-06 20:06:59,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-08-06 20:06:59,556 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 20:06:59,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:59,558 INFO L225 Difference]: With dead ends: 717 [2021-08-06 20:06:59,558 INFO L226 Difference]: Without dead ends: 683 [2021-08-06 20:06:59,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4614 ImplicationChecksByTransitivity, 2987.4ms TimeCoverageRelationStatistics Valid=1647, Invalid=11235, Unknown=0, NotChecked=0, Total=12882 [2021-08-06 20:06:59,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-08-06 20:06:59,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 362. [2021-08-06 20:06:59,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 1.745152354570637) internal successors, (630), 361 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:59,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 630 transitions. [2021-08-06 20:06:59,565 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 630 transitions. Word has length 33 [2021-08-06 20:06:59,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:59,565 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 630 transitions. [2021-08-06 20:06:59,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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 20:06:59,565 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 630 transitions. [2021-08-06 20:06:59,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 20:06:59,566 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:59,566 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:59,588 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 20:06:59,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:59,785 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:06:59,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:59,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1096636173, now seen corresponding path program 37 times [2021-08-06 20:06:59,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:59,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412967887] [2021-08-06 20:06:59,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:59,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:59,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:06:59,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:59,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412967887] [2021-08-06 20:06:59,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412967887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:59,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467148349] [2021-08-06 20:06:59,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:06:59,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:59,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:59,989 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 20:06:59,991 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 20:07:01,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:01,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 20:07:01,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:07:01,897 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:07:01,899 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:07:01,933 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:07:01,934 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:07:01,948 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:07:01,949 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:07:01,963 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:07:01,964 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:07:01,981 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 20:07:01,982 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 20:07:01,986 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:07:01,987 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:07:02,003 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:07:02,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467148349] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:02,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:07:02,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-06 20:07:02,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744591166] [2021-08-06 20:07:02,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 20:07:02,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:07:02,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 20:07:02,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:07:02,004 INFO L87 Difference]: Start difference. First operand 362 states and 630 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 20:07:02,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:07:02,083 INFO L93 Difference]: Finished difference Result 482 states and 831 transitions. [2021-08-06 20:07:02,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:07:02,083 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 33 [2021-08-06 20:07:02,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:07:02,084 INFO L225 Difference]: With dead ends: 482 [2021-08-06 20:07:02,085 INFO L226 Difference]: Without dead ends: 452 [2021-08-06 20:07:02,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:07:02,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-08-06 20:07:02,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 393. [2021-08-06 20:07:02,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 1.7244897959183674) internal successors, (676), 392 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:02,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 676 transitions. [2021-08-06 20:07:02,089 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 676 transitions. Word has length 33 [2021-08-06 20:07:02,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:07:02,089 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 676 transitions. [2021-08-06 20:07:02,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 20:07:02,089 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 676 transitions. [2021-08-06 20:07:02,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 20:07:02,106 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:07:02,106 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:07:02,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-08-06 20:07:02,328 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,SelfDestructingSolverStorable38 [2021-08-06 20:07:02,329 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:07:02,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:07:02,329 INFO L82 PathProgramCache]: Analyzing trace with hash -923248021, now seen corresponding path program 38 times [2021-08-06 20:07:02,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:07:02,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268481734] [2021-08-06 20:07:02,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:07:02,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:07:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:02,547 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 86, result has 33.3 percent of original size [2021-08-06 20:07:02,563 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 86, result has 33.3 percent of original size [2021-08-06 20:07:02,726 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 55.1 percent of original size [2021-08-06 20:07:02,728 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 55.1 percent of original size [2021-08-06 20:07:02,755 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 50.0 percent of original size [2021-08-06 20:07:02,757 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 50.0 percent of original size [2021-08-06 20:07:02,819 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:07:02,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:07:02,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268481734] [2021-08-06 20:07:02,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268481734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:02,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838990132] [2021-08-06 20:07:02,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:07:02,820 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:02,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:07:02,821 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 20:07:02,822 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 20:07:04,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:07:04,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:07:04,607 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 20:07:04,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:07:04,865 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:04,869 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:04,958 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:07:04,961 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:07:05,011 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:07:05,014 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:07:05,091 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 48.1 percent of original size [2021-08-06 20:07:05,094 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 48.1 percent of original size [2021-08-06 20:07:05,528 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:05,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838990132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:05,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:07:05,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-08-06 20:07:05,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652574985] [2021-08-06 20:07:05,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 20:07:05,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:07:05,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 20:07:05,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:07:05,529 INFO L87 Difference]: Start difference. First operand 393 states and 676 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:07,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:07:07,619 INFO L93 Difference]: Finished difference Result 476 states and 791 transitions. [2021-08-06 20:07:07,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-06 20:07:07,619 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 20:07:07,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:07:07,620 INFO L225 Difference]: With dead ends: 476 [2021-08-06 20:07:07,621 INFO L226 Difference]: Without dead ends: 456 [2021-08-06 20:07:07,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 1812.3ms TimeCoverageRelationStatistics Valid=395, Invalid=3637, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 20:07:07,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-08-06 20:07:07,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 335. [2021-08-06 20:07:07,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 1.7125748502994012) internal successors, (572), 334 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:07,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 572 transitions. [2021-08-06 20:07:07,631 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 572 transitions. Word has length 33 [2021-08-06 20:07:07,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:07:07,631 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 572 transitions. [2021-08-06 20:07:07,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:07,631 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 572 transitions. [2021-08-06 20:07:07,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 20:07:07,631 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:07:07,631 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:07:07,689 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 20:07:07,852 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,SelfDestructingSolverStorable39 [2021-08-06 20:07:07,853 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:07:07,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:07:07,853 INFO L82 PathProgramCache]: Analyzing trace with hash -271756757, now seen corresponding path program 39 times [2021-08-06 20:07:07,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:07:07,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970775558] [2021-08-06 20:07:07,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:07:07,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:07:07,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:08,007 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 86, result has 33.3 percent of original size [2021-08-06 20:07:08,011 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 86, result has 33.3 percent of original size [2021-08-06 20:07:08,129 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 55.1 percent of original size [2021-08-06 20:07:08,131 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 55.1 percent of original size [2021-08-06 20:07:08,228 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:07:08,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:07:08,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970775558] [2021-08-06 20:07:08,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970775558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:08,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385359669] [2021-08-06 20:07:08,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:07:08,229 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:08,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:07:08,229 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 20:07:08,231 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 20:07:09,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 20:07:09,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:07:09,890 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 20:07:09,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:07:10,106 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:10,108 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:10,215 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:07:10,217 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:07:10,267 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:07:10,269 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:07:10,321 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 45.1 percent of original size [2021-08-06 20:07:10,323 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 45.1 percent of original size [2021-08-06 20:07:10,710 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:10,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385359669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:10,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:07:10,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-08-06 20:07:10,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555873106] [2021-08-06 20:07:10,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:07:10,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:07:10,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:07:10,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:07:10,711 INFO L87 Difference]: Start difference. First operand 335 states and 572 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:12,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:07:12,473 INFO L93 Difference]: Finished difference Result 458 states and 772 transitions. [2021-08-06 20:07:12,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-06 20:07:12,473 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 20:07:12,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:07:12,474 INFO L225 Difference]: With dead ends: 458 [2021-08-06 20:07:12,474 INFO L226 Difference]: Without dead ends: 446 [2021-08-06 20:07:12,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1711.5ms TimeCoverageRelationStatistics Valid=486, Invalid=3936, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 20:07:12,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-08-06 20:07:12,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 348. [2021-08-06 20:07:12,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 1.7118155619596542) internal successors, (594), 347 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:12,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 594 transitions. [2021-08-06 20:07:12,479 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 594 transitions. Word has length 33 [2021-08-06 20:07:12,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:07:12,479 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 594 transitions. [2021-08-06 20:07:12,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:12,479 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 594 transitions. [2021-08-06 20:07:12,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:07:12,479 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:07:12,479 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:07:12,509 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 20:07:12,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:12,701 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:07:12,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:07:12,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1049707249, now seen corresponding path program 40 times [2021-08-06 20:07:12,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:07:12,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167311259] [2021-08-06 20:07:12,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:07:12,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:07:12,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:12,926 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:07:12,930 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:07:12,960 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:07:12,963 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:07:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:13,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:07:13,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167311259] [2021-08-06 20:07:13,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167311259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:13,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281612427] [2021-08-06 20:07:13,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:07:13,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:13,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:07:13,022 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 20:07:13,023 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 20:07:14,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:07:14,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:07:14,728 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-06 20:07:14,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:07:15,170 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:15,172 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:15,215 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:15,217 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:15,261 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:15,263 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:15,307 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:15,335 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:15,407 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:07:15,410 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:07:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:15,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281612427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:15,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:07:15,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-06 20:07:15,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419619358] [2021-08-06 20:07:15,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-06 20:07:15,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:07:15,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-06 20:07:15,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:07:15,546 INFO L87 Difference]: Start difference. First operand 348 states and 594 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:17,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:07:17,158 INFO L93 Difference]: Finished difference Result 566 states and 916 transitions. [2021-08-06 20:07:17,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-08-06 20:07:17,158 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:07:17,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:07:17,160 INFO L225 Difference]: With dead ends: 566 [2021-08-06 20:07:17,160 INFO L226 Difference]: Without dead ends: 534 [2021-08-06 20:07:17,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1841 ImplicationChecksByTransitivity, 1623.9ms TimeCoverageRelationStatistics Valid=811, Invalid=5669, Unknown=0, NotChecked=0, Total=6480 [2021-08-06 20:07:17,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-08-06 20:07:17,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 435. [2021-08-06 20:07:17,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 1.7511520737327189) internal successors, (760), 434 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:17,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 760 transitions. [2021-08-06 20:07:17,165 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 760 transitions. Word has length 35 [2021-08-06 20:07:17,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:07:17,166 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 760 transitions. [2021-08-06 20:07:17,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:17,166 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 760 transitions. [2021-08-06 20:07:17,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:07:17,166 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:07:17,166 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:07:17,189 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 20:07:17,387 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,SelfDestructingSolverStorable41 [2021-08-06 20:07:17,387 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:07:17,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:07:17,387 INFO L82 PathProgramCache]: Analyzing trace with hash -872633615, now seen corresponding path program 41 times [2021-08-06 20:07:17,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:07:17,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145103779] [2021-08-06 20:07:17,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:07:17,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:07:17,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:17,576 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:07:17,580 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:07:17,606 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:07:17,609 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:07:17,660 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:17,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:07:17,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145103779] [2021-08-06 20:07:17,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145103779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:17,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353719213] [2021-08-06 20:07:17,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:07:17,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:17,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:07:17,662 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 20:07:17,663 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 20:07:19,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 20:07:19,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:07:19,361 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-06 20:07:19,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:07:19,760 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:19,763 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:19,850 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:19,852 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:19,896 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:19,899 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:19,947 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:19,949 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:20,021 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:07:20,033 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:07:20,171 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:20,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353719213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:20,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:07:20,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-06 20:07:20,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077176215] [2021-08-06 20:07:20,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-06 20:07:20,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:07:20,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-06 20:07:20,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:07:20,172 INFO L87 Difference]: Start difference. First operand 435 states and 760 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:21,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:07:21,930 INFO L93 Difference]: Finished difference Result 584 states and 940 transitions. [2021-08-06 20:07:21,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-06 20:07:21,930 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:07:21,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:07:21,932 INFO L225 Difference]: With dead ends: 584 [2021-08-06 20:07:21,932 INFO L226 Difference]: Without dead ends: 556 [2021-08-06 20:07:21,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2138 ImplicationChecksByTransitivity, 1704.6ms TimeCoverageRelationStatistics Valid=896, Invalid=6414, Unknown=0, NotChecked=0, Total=7310 [2021-08-06 20:07:21,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-08-06 20:07:21,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 437. [2021-08-06 20:07:21,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 1.75) internal successors, (763), 436 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:21,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 763 transitions. [2021-08-06 20:07:21,937 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 763 transitions. Word has length 35 [2021-08-06 20:07:21,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:07:21,938 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 763 transitions. [2021-08-06 20:07:21,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:21,938 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 763 transitions. [2021-08-06 20:07:21,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:07:21,938 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:07:21,938 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:07:21,959 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 20:07:22,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:22,161 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:07:22,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:07:22,161 INFO L82 PathProgramCache]: Analyzing trace with hash 220336881, now seen corresponding path program 42 times [2021-08-06 20:07:22,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:07:22,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078105665] [2021-08-06 20:07:22,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:07:22,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:07:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:22,343 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:07:22,347 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:07:22,373 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:07:22,376 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:07:22,430 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:22,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:07:22,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078105665] [2021-08-06 20:07:22,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078105665] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:22,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289980298] [2021-08-06 20:07:22,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:07:22,430 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:22,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:07:22,433 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 20:07:22,468 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 20:07:24,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 20:07:24,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:07:24,286 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-06 20:07:24,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:07:24,699 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:24,702 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:24,749 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:24,751 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:24,846 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:24,848 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:24,894 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:24,896 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:25,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289980298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:25,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:07:25,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-06 20:07:25,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932265785] [2021-08-06 20:07:25,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-06 20:07:25,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:07:25,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-06 20:07:25,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:07:25,187 INFO L87 Difference]: Start difference. First operand 437 states and 763 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:27,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:07:27,089 INFO L93 Difference]: Finished difference Result 582 states and 939 transitions. [2021-08-06 20:07:27,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-08-06 20:07:27,089 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:07:27,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:07:27,090 INFO L225 Difference]: With dead ends: 582 [2021-08-06 20:07:27,090 INFO L226 Difference]: Without dead ends: 558 [2021-08-06 20:07:27,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2393 ImplicationChecksByTransitivity, 1874.1ms TimeCoverageRelationStatistics Valid=992, Invalid=7198, Unknown=0, NotChecked=0, Total=8190 [2021-08-06 20:07:27,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-08-06 20:07:27,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 439. [2021-08-06 20:07:27,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 1.7488584474885844) internal successors, (766), 438 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:27,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 766 transitions. [2021-08-06 20:07:27,097 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 766 transitions. Word has length 35 [2021-08-06 20:07:27,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:07:27,097 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 766 transitions. [2021-08-06 20:07:27,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:27,097 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 766 transitions. [2021-08-06 20:07:27,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:07:27,097 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:07:27,097 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:07:27,121 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 20:07:27,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:27,321 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:07:27,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:07:27,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1467909391, now seen corresponding path program 43 times [2021-08-06 20:07:27,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:07:27,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867975836] [2021-08-06 20:07:27,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:07:27,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:07:27,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:27,511 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:07:27,515 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:07:27,541 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:07:27,544 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:07:27,600 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:27,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:07:27,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867975836] [2021-08-06 20:07:27,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867975836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:27,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576642176] [2021-08-06 20:07:27,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:07:27,600 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:27,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:07:27,601 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 20:07:27,602 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 20:07:29,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:29,404 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-06 20:07:29,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:07:29,776 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:29,778 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:29,835 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:29,837 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:29,881 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:29,883 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:29,974 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:29,976 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:30,049 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:07:30,051 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:07:30,196 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:30,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576642176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:30,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:07:30,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-06 20:07:30,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536009863] [2021-08-06 20:07:30,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-06 20:07:30,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:07:30,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-06 20:07:30,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:07:30,197 INFO L87 Difference]: Start difference. First operand 439 states and 766 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:32,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:07:32,157 INFO L93 Difference]: Finished difference Result 581 states and 939 transitions. [2021-08-06 20:07:32,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-08-06 20:07:32,158 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:07:32,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:07:32,159 INFO L225 Difference]: With dead ends: 581 [2021-08-06 20:07:32,159 INFO L226 Difference]: Without dead ends: 561 [2021-08-06 20:07:32,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2741 ImplicationChecksByTransitivity, 1914.4ms TimeCoverageRelationStatistics Valid=1119, Invalid=8001, Unknown=0, NotChecked=0, Total=9120 [2021-08-06 20:07:32,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-08-06 20:07:32,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 441. [2021-08-06 20:07:32,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 1.7477272727272728) internal successors, (769), 440 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:32,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 769 transitions. [2021-08-06 20:07:32,167 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 769 transitions. Word has length 35 [2021-08-06 20:07:32,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:07:32,167 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 769 transitions. [2021-08-06 20:07:32,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:32,168 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 769 transitions. [2021-08-06 20:07:32,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:07:32,168 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:07:32,168 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:07:32,193 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 20:07:32,389 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,SelfDestructingSolverStorable44 [2021-08-06 20:07:32,389 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:07:32,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:07:32,389 INFO L82 PathProgramCache]: Analyzing trace with hash -459611407, now seen corresponding path program 44 times [2021-08-06 20:07:32,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:07:32,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157663269] [2021-08-06 20:07:32,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:07:32,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:07:32,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:32,553 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:07:32,556 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:07:32,583 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:07:32,587 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:07:32,614 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:07:32,617 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:07:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:32,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:07:32,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157663269] [2021-08-06 20:07:32,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157663269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:32,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606679676] [2021-08-06 20:07:32,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:07:32,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:32,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:07:32,676 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 20:07:32,677 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 20:07:34,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:07:34,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:07:34,542 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-06 20:07:34,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:07:34,929 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:34,931 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:34,973 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:34,975 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:35,020 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:35,023 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:35,067 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:35,069 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:35,193 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:07:35,195 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:07:35,330 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:35,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606679676] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:35,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:07:35,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-06 20:07:35,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320960648] [2021-08-06 20:07:35,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-06 20:07:35,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:07:35,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-06 20:07:35,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:07:35,331 INFO L87 Difference]: Start difference. First operand 441 states and 769 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:37,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:07:37,421 INFO L93 Difference]: Finished difference Result 616 states and 990 transitions. [2021-08-06 20:07:37,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-08-06 20:07:37,421 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:07:37,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:07:37,423 INFO L225 Difference]: With dead ends: 616 [2021-08-06 20:07:37,423 INFO L226 Difference]: Without dead ends: 592 [2021-08-06 20:07:37,423 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2870 ImplicationChecksByTransitivity, 1966.4ms TimeCoverageRelationStatistics Valid=1176, Invalid=8330, Unknown=0, NotChecked=0, Total=9506 [2021-08-06 20:07:37,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-08-06 20:07:37,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 449. [2021-08-06 20:07:37,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.7477678571428572) internal successors, (783), 448 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:37,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 783 transitions. [2021-08-06 20:07:37,428 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 783 transitions. Word has length 35 [2021-08-06 20:07:37,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:07:37,429 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 783 transitions. [2021-08-06 20:07:37,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:37,429 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 783 transitions. [2021-08-06 20:07:37,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:07:37,429 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:07:37,429 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:07:37,453 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 20:07:37,644 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,SelfDestructingSolverStorable45 [2021-08-06 20:07:37,645 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:07:37,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:07:37,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1477555471, now seen corresponding path program 45 times [2021-08-06 20:07:37,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:07:37,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817631326] [2021-08-06 20:07:37,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:07:37,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:07:37,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:37,811 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:07:37,815 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:07:37,844 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 27.7 percent of original size [2021-08-06 20:07:37,847 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 27.7 percent of original size [2021-08-06 20:07:37,928 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:37,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:07:37,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817631326] [2021-08-06 20:07:37,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817631326] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:37,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73410495] [2021-08-06 20:07:37,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:07:37,928 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:37,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:07:37,929 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 20:07:37,937 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 20:07:39,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 20:07:39,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:07:39,852 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-06 20:07:39,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:07:40,241 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:40,243 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:40,285 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:40,287 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:40,331 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:40,333 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:40,377 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:40,379 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:40,449 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:07:40,452 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:07:40,646 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:40,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73410495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:40,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:07:40,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-06 20:07:40,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276189676] [2021-08-06 20:07:40,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-06 20:07:40,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:07:40,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-06 20:07:40,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:07:40,647 INFO L87 Difference]: Start difference. First operand 449 states and 783 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:42,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:07:42,738 INFO L93 Difference]: Finished difference Result 590 states and 964 transitions. [2021-08-06 20:07:42,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-08-06 20:07:42,738 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:07:42,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:07:42,740 INFO L225 Difference]: With dead ends: 590 [2021-08-06 20:07:42,740 INFO L226 Difference]: Without dead ends: 580 [2021-08-06 20:07:42,741 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2586 ImplicationChecksByTransitivity, 2016.6ms TimeCoverageRelationStatistics Valid=1220, Invalid=7522, Unknown=0, NotChecked=0, Total=8742 [2021-08-06 20:07:42,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-08-06 20:07:42,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 449. [2021-08-06 20:07:42,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.7477678571428572) internal successors, (783), 448 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:42,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 783 transitions. [2021-08-06 20:07:42,746 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 783 transitions. Word has length 35 [2021-08-06 20:07:42,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:07:42,746 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 783 transitions. [2021-08-06 20:07:42,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:42,746 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 783 transitions. [2021-08-06 20:07:42,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:07:42,747 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:07:42,747 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:07:42,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-06 20:07:42,947 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,SelfDestructingSolverStorable46 [2021-08-06 20:07:42,947 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:07:42,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:07:42,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1817076077, now seen corresponding path program 46 times [2021-08-06 20:07:42,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:07:42,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957512189] [2021-08-06 20:07:42,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:07:42,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:07:42,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:43,255 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:07:43,259 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:07:43,289 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:07:43,292 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:07:43,360 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:43,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:07:43,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957512189] [2021-08-06 20:07:43,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957512189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:43,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613967744] [2021-08-06 20:07:43,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:07:43,361 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:43,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:07:43,365 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 20:07:43,388 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 20:07:45,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:07:45,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:07:45,354 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-06 20:07:45,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:07:45,698 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:07:45,700 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:07:45,753 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:07:45,755 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:07:45,885 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:45,887 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:45,931 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:45,933 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:46,004 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:07:46,007 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:07:46,141 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:46,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613967744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:46,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:07:46,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-06 20:07:46,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269415480] [2021-08-06 20:07:46,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-06 20:07:46,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:07:46,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-06 20:07:46,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:07:46,142 INFO L87 Difference]: Start difference. First operand 449 states and 783 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:47,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:07:47,725 INFO L93 Difference]: Finished difference Result 580 states and 943 transitions. [2021-08-06 20:07:47,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-06 20:07:47,726 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:07:47,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:07:47,727 INFO L225 Difference]: With dead ends: 580 [2021-08-06 20:07:47,727 INFO L226 Difference]: Without dead ends: 556 [2021-08-06 20:07:47,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2161 ImplicationChecksByTransitivity, 1727.7ms TimeCoverageRelationStatistics Valid=843, Invalid=6467, Unknown=0, NotChecked=0, Total=7310 [2021-08-06 20:07:47,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-08-06 20:07:47,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 453. [2021-08-06 20:07:47,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.747787610619469) internal successors, (790), 452 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:47,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 790 transitions. [2021-08-06 20:07:47,733 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 790 transitions. Word has length 35 [2021-08-06 20:07:47,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:07:47,733 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 790 transitions. [2021-08-06 20:07:47,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:47,733 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 790 transitions. [2021-08-06 20:07:47,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:07:47,734 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:07:47,734 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:07:47,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-06 20:07:47,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:47,945 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:07:47,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:07:47,945 INFO L82 PathProgramCache]: Analyzing trace with hash 128829805, now seen corresponding path program 47 times [2021-08-06 20:07:47,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:07:47,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627042374] [2021-08-06 20:07:47,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:07:47,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:07:47,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:48,125 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:07:48,129 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:07:48,155 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:07:48,158 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:07:48,209 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:48,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:07:48,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627042374] [2021-08-06 20:07:48,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627042374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:48,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793480042] [2021-08-06 20:07:48,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:07:48,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:48,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:07:48,213 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 20:07:48,214 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 20:07:50,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 20:07:50,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:07:50,236 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-06 20:07:50,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:07:50,594 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:07:50,597 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:07:50,648 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:07:50,651 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:07:50,736 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:50,738 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:50,827 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:50,829 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:07:50,899 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:07:50,902 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:07:51,047 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:51,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793480042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:51,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:07:51,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-06 20:07:51,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497671832] [2021-08-06 20:07:51,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-06 20:07:51,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:07:51,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-06 20:07:51,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1044, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:07:51,048 INFO L87 Difference]: Start difference. First operand 453 states and 790 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:52,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:07:52,930 INFO L93 Difference]: Finished difference Result 600 states and 980 transitions. [2021-08-06 20:07:52,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-06 20:07:52,930 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:07:52,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:07:52,932 INFO L225 Difference]: With dead ends: 600 [2021-08-06 20:07:52,932 INFO L226 Difference]: Without dead ends: 580 [2021-08-06 20:07:52,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2453 ImplicationChecksByTransitivity, 1799.0ms TimeCoverageRelationStatistics Valid=975, Invalid=7215, Unknown=0, NotChecked=0, Total=8190 [2021-08-06 20:07:52,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-08-06 20:07:52,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 461. [2021-08-06 20:07:52,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 1.7630434782608695) internal successors, (811), 460 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:52,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 811 transitions. [2021-08-06 20:07:52,944 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 811 transitions. Word has length 35 [2021-08-06 20:07:52,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:07:52,944 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 811 transitions. [2021-08-06 20:07:52,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:52,944 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 811 transitions. [2021-08-06 20:07:52,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:07:52,945 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:07:52,945 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:07:52,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-06 20:07:53,145 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,SelfDestructingSolverStorable48 [2021-08-06 20:07:53,145 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:07:53,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:07:53,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1137127789, now seen corresponding path program 48 times [2021-08-06 20:07:53,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:07:53,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587672986] [2021-08-06 20:07:53,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:07:53,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:07:53,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:53,309 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:07:53,312 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:07:53,339 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:07:53,343 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:07:53,368 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:07:53,371 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:07:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:53,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:07:53,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587672986] [2021-08-06 20:07:53,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587672986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:53,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190276992] [2021-08-06 20:07:53,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:07:53,423 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:53,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:07:53,424 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 20:07:53,426 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 20:07:55,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 20:07:55,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:07:55,520 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-06 20:07:55,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:07:55,861 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:07:55,863 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:07:56,792 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:56,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190276992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:56,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:07:56,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-06 20:07:56,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888668065] [2021-08-06 20:07:56,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-06 20:07:56,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:07:56,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-06 20:07:56,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:07:56,793 INFO L87 Difference]: Start difference. First operand 461 states and 811 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:59,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:07:59,365 INFO L93 Difference]: Finished difference Result 663 states and 1080 transitions. [2021-08-06 20:07:59,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-08-06 20:07:59,365 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:07:59,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:07:59,367 INFO L225 Difference]: With dead ends: 663 [2021-08-06 20:07:59,367 INFO L226 Difference]: Without dead ends: 637 [2021-08-06 20:07:59,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2816 ImplicationChecksByTransitivity, 2427.7ms TimeCoverageRelationStatistics Valid=1114, Invalid=8786, Unknown=0, NotChecked=0, Total=9900 [2021-08-06 20:07:59,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-08-06 20:07:59,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 472. [2021-08-06 20:07:59,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 1.762208067940552) internal successors, (830), 471 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:59,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 830 transitions. [2021-08-06 20:07:59,373 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 830 transitions. Word has length 35 [2021-08-06 20:07:59,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:07:59,373 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 830 transitions. [2021-08-06 20:07:59,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:59,373 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 830 transitions. [2021-08-06 20:07:59,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:07:59,373 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:07:59,374 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:07:59,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-06 20:07:59,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-06 20:07:59,585 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:07:59,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:07:59,585 INFO L82 PathProgramCache]: Analyzing trace with hash -988539095, now seen corresponding path program 49 times [2021-08-06 20:07:59,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:07:59,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295345127] [2021-08-06 20:07:59,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:07:59,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:07:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:59,781 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:07:59,784 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:07:59,812 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:07:59,815 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:07:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:59,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:07:59,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295345127] [2021-08-06 20:07:59,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295345127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:59,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398543203] [2021-08-06 20:07:59,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:07:59,870 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:59,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:07:59,871 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 20:07:59,871 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 20:08:02,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:08:02,041 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-06 20:08:02,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:08:02,383 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:02,386 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:02,445 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:02,447 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:02,499 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:02,501 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:02,634 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:08:02,636 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:08:02,712 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:02,714 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:02,854 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:02,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398543203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:02,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:08:02,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-06 20:08:02,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583553109] [2021-08-06 20:08:02,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-06 20:08:02,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:08:02,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-06 20:08:02,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:08:02,855 INFO L87 Difference]: Start difference. First operand 472 states and 830 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:04,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:08:04,580 INFO L93 Difference]: Finished difference Result 587 states and 970 transitions. [2021-08-06 20:08:04,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-06 20:08:04,580 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:08:04,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:08:04,581 INFO L225 Difference]: With dead ends: 587 [2021-08-06 20:08:04,581 INFO L226 Difference]: Without dead ends: 567 [2021-08-06 20:08:04,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 1796.2ms TimeCoverageRelationStatistics Valid=957, Invalid=7415, Unknown=0, NotChecked=0, Total=8372 [2021-08-06 20:08:04,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-08-06 20:08:04,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 475. [2021-08-06 20:08:04,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 1.761603375527426) internal successors, (835), 474 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:04,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 835 transitions. [2021-08-06 20:08:04,587 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 835 transitions. Word has length 35 [2021-08-06 20:08:04,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:08:04,587 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 835 transitions. [2021-08-06 20:08:04,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:04,587 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 835 transitions. [2021-08-06 20:08:04,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:08:04,588 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:08:04,588 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:08:04,610 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 20:08:04,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:08:04,789 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:08:04,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:08:04,789 INFO L82 PathProgramCache]: Analyzing trace with hash 19758889, now seen corresponding path program 50 times [2021-08-06 20:08:04,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:08:04,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309276256] [2021-08-06 20:08:04,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:08:04,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:08:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:08:04,951 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:08:04,954 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:08:04,981 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:08:04,985 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:08:05,011 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:08:05,014 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:08:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:05,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:08:05,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309276256] [2021-08-06 20:08:05,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309276256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:05,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043804353] [2021-08-06 20:08:05,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:08:05,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:08:05,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:08:05,068 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 20:08:05,069 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 20:08:07,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:08:07,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:08:07,279 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-06 20:08:07,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:08:07,626 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:07,628 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:07,680 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:07,682 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:07,747 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:07,750 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:07,836 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:08:07,838 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:08:07,957 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:07,961 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:08,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043804353] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:08,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:08:08,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-06 20:08:08,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346579381] [2021-08-06 20:08:08,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-06 20:08:08,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:08:08,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-06 20:08:08,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:08:08,107 INFO L87 Difference]: Start difference. First operand 475 states and 835 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:10,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:08:10,070 INFO L93 Difference]: Finished difference Result 643 states and 1051 transitions. [2021-08-06 20:08:10,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-08-06 20:08:10,071 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:08:10,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:08:10,072 INFO L225 Difference]: With dead ends: 643 [2021-08-06 20:08:10,072 INFO L226 Difference]: Without dead ends: 617 [2021-08-06 20:08:10,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2741 ImplicationChecksByTransitivity, 1884.0ms TimeCoverageRelationStatistics Valid=1073, Invalid=7857, Unknown=0, NotChecked=0, Total=8930 [2021-08-06 20:08:10,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-08-06 20:08:10,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 456. [2021-08-06 20:08:10,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.7384615384615385) internal successors, (791), 455 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:10,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 791 transitions. [2021-08-06 20:08:10,078 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 791 transitions. Word has length 35 [2021-08-06 20:08:10,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:08:10,078 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 791 transitions. [2021-08-06 20:08:10,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:10,078 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 791 transitions. [2021-08-06 20:08:10,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:08:10,079 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:08:10,079 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:08:10,102 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 20:08:10,280 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,SelfDestructingSolverStorable51 [2021-08-06 20:08:10,281 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:08:10,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:08:10,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1711010843, now seen corresponding path program 51 times [2021-08-06 20:08:10,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:08:10,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338631832] [2021-08-06 20:08:10,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:08:10,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:08:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:08:10,433 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 32.0 percent of original size [2021-08-06 20:08:10,436 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 32.0 percent of original size [2021-08-06 20:08:10,486 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 60.0 percent of original size [2021-08-06 20:08:10,487 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 60.0 percent of original size [2021-08-06 20:08:10,510 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 55.6 percent of original size [2021-08-06 20:08:10,511 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 55.6 percent of original size [2021-08-06 20:08:10,532 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 51.5 percent of original size [2021-08-06 20:08:10,533 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 51.5 percent of original size [2021-08-06 20:08:10,582 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:10,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:08:10,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338631832] [2021-08-06 20:08:10,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338631832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:10,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081763060] [2021-08-06 20:08:10,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:08:10,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:08:10,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:08:10,583 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 20:08:10,584 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 20:08:12,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 20:08:12,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:08:12,905 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-06 20:08:12,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:08:13,247 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:13,250 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:13,311 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:13,313 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:13,484 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:13,486 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:13,597 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:13,599 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:14,000 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:14,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081763060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:14,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:08:14,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-06 20:08:14,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830261791] [2021-08-06 20:08:14,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-06 20:08:14,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:08:14,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-06 20:08:14,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:08:14,002 INFO L87 Difference]: Start difference. First operand 456 states and 791 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:17,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:08:17,058 INFO L93 Difference]: Finished difference Result 650 states and 1060 transitions. [2021-08-06 20:08:17,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-08-06 20:08:17,059 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:08:17,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:08:17,060 INFO L225 Difference]: With dead ends: 650 [2021-08-06 20:08:17,060 INFO L226 Difference]: Without dead ends: 632 [2021-08-06 20:08:17,061 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3659 ImplicationChecksByTransitivity, 3057.5ms TimeCoverageRelationStatistics Valid=1272, Invalid=10070, Unknown=0, NotChecked=0, Total=11342 [2021-08-06 20:08:17,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-08-06 20:08:17,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 430. [2021-08-06 20:08:17,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 1.7156177156177157) internal successors, (736), 429 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:17,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 736 transitions. [2021-08-06 20:08:17,067 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 736 transitions. Word has length 35 [2021-08-06 20:08:17,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:08:17,067 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 736 transitions. [2021-08-06 20:08:17,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:17,067 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 736 transitions. [2021-08-06 20:08:17,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 20:08:17,068 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:08:17,068 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:08:17,093 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 20:08:17,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:08:17,289 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:08:17,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:08:17,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1593505313, now seen corresponding path program 52 times [2021-08-06 20:08:17,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:08:17,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151479777] [2021-08-06 20:08:17,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:08:17,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:08:17,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:08:17,775 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 20:08:17,776 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 20:08:17,876 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 20:08:17,878 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 20:08:17,899 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:08:17,900 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:08:17,919 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:17,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:08:17,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151479777] [2021-08-06 20:08:17,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151479777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:17,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120528007] [2021-08-06 20:08:17,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:08:17,920 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:08:17,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:08:17,920 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 20:08:17,921 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 20:08:20,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:08:20,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:08:20,570 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-06 20:08:20,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:08:21,342 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:21,344 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:21,396 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:21,406 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:21,459 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:21,462 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:21,514 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:21,516 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:21,596 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 55.6 percent of original size [2021-08-06 20:08:21,599 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 55.6 percent of original size [2021-08-06 20:08:21,996 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:21,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120528007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:21,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:08:21,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-08-06 20:08:21,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851225984] [2021-08-06 20:08:21,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-06 20:08:21,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:08:21,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-06 20:08:21,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1152, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 20:08:21,997 INFO L87 Difference]: Start difference. First operand 430 states and 736 transitions. Second operand has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:24,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:08:24,544 INFO L93 Difference]: Finished difference Result 712 states and 1147 transitions. [2021-08-06 20:08:24,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-06 20:08:24,545 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 20:08:24,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:08:24,547 INFO L225 Difference]: With dead ends: 712 [2021-08-06 20:08:24,547 INFO L226 Difference]: Without dead ends: 688 [2021-08-06 20:08:24,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2387 ImplicationChecksByTransitivity, 2594.8ms TimeCoverageRelationStatistics Valid=1104, Invalid=7268, Unknown=0, NotChecked=0, Total=8372 [2021-08-06 20:08:24,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-08-06 20:08:24,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 455. [2021-08-06 20:08:24,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 1.722466960352423) internal successors, (782), 454 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:24,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 782 transitions. [2021-08-06 20:08:24,553 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 782 transitions. Word has length 37 [2021-08-06 20:08:24,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:08:24,553 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 782 transitions. [2021-08-06 20:08:24,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:24,553 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 782 transitions. [2021-08-06 20:08:24,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 20:08:24,554 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:08:24,554 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:08:24,580 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 20:08:24,768 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,SelfDestructingSolverStorable53 [2021-08-06 20:08:24,769 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:08:24,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:08:24,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1570514227, now seen corresponding path program 53 times [2021-08-06 20:08:24,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:08:24,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883860266] [2021-08-06 20:08:24,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:08:24,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:08:24,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:08:26,436 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 20:08:26,438 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 20:08:26,461 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 20:08:26,462 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 20:08:26,482 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:08:26,483 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:08:26,502 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:26,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:08:26,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883860266] [2021-08-06 20:08:26,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883860266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:26,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398883012] [2021-08-06 20:08:26,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:08:26,503 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:08:26,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:08:26,503 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 20:08:26,504 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 20:08:29,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 20:08:29,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:08:29,205 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-06 20:08:29,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:08:29,808 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:08:29,810 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:08:29,854 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:08:29,856 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:08:29,899 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:08:29,901 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:08:29,945 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:08:29,947 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:08:30,015 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:30,017 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:30,282 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:30,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398883012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:30,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:08:30,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 32 [2021-08-06 20:08:30,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460890532] [2021-08-06 20:08:30,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-06 20:08:30,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:08:30,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-06 20:08:30,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 20:08:30,283 INFO L87 Difference]: Start difference. First operand 455 states and 782 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:33,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:08:33,782 INFO L93 Difference]: Finished difference Result 941 states and 1499 transitions. [2021-08-06 20:08:33,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-08-06 20:08:33,782 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 20:08:33,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:08:33,785 INFO L225 Difference]: With dead ends: 941 [2021-08-06 20:08:33,785 INFO L226 Difference]: Without dead ends: 903 [2021-08-06 20:08:33,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6511 ImplicationChecksByTransitivity, 3772.5ms TimeCoverageRelationStatistics Valid=2192, Invalid=15630, Unknown=0, NotChecked=0, Total=17822 [2021-08-06 20:08:33,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2021-08-06 20:08:33,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 498. [2021-08-06 20:08:33,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 1.7364185110663983) internal successors, (863), 497 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:33,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 863 transitions. [2021-08-06 20:08:33,793 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 863 transitions. Word has length 37 [2021-08-06 20:08:33,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:08:33,793 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 863 transitions. [2021-08-06 20:08:33,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:33,793 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 863 transitions. [2021-08-06 20:08:33,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 20:08:33,794 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:08:33,794 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:08:33,819 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 20:08:34,008 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,SelfDestructingSolverStorable54 [2021-08-06 20:08:34,009 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:08:34,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:08:34,009 INFO L82 PathProgramCache]: Analyzing trace with hash 2046307699, now seen corresponding path program 54 times [2021-08-06 20:08:34,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:08:34,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229658739] [2021-08-06 20:08:34,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:08:34,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:08:34,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:08:34,233 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:08:34,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:08:34,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229658739] [2021-08-06 20:08:34,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229658739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:34,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207608517] [2021-08-06 20:08:34,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:08:34,234 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:08:34,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:08:34,235 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 20:08:34,236 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 20:08:36,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 20:08:36,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:08:36,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:08:36,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:08:36,954 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:08:36,955 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:08:36,991 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:08:36,992 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:08:37,006 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:08:37,007 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:08:37,021 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:08:37,022 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:08:37,036 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:08:37,037 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:08:37,054 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 20:08:37,055 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 20:08:37,060 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:08:37,060 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:08:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:08:37,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207608517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:37,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:08:37,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-06 20:08:37,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239031257] [2021-08-06 20:08:37,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:08:37,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:08:37,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:08:37,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:08:37,077 INFO L87 Difference]: Start difference. First operand 498 states and 863 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:37,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:08:37,190 INFO L93 Difference]: Finished difference Result 653 states and 1119 transitions. [2021-08-06 20:08:37,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:08:37,190 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 20:08:37,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:08:37,192 INFO L225 Difference]: With dead ends: 653 [2021-08-06 20:08:37,192 INFO L226 Difference]: Without dead ends: 615 [2021-08-06 20:08:37,192 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:08:37,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-08-06 20:08:37,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 540. [2021-08-06 20:08:37,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 1.7142857142857142) internal successors, (924), 539 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:37,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 924 transitions. [2021-08-06 20:08:37,198 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 924 transitions. Word has length 37 [2021-08-06 20:08:37,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:08:37,198 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 924 transitions. [2021-08-06 20:08:37,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:37,198 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 924 transitions. [2021-08-06 20:08:37,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 20:08:37,198 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:08:37,199 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:08:37,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-06 20:08:37,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:08:37,405 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:08:37,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:08:37,405 INFO L82 PathProgramCache]: Analyzing trace with hash 446125479, now seen corresponding path program 55 times [2021-08-06 20:08:37,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:08:37,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277022746] [2021-08-06 20:08:37,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:08:37,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:08:37,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:08:37,702 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 112, result has 27.7 percent of original size [2021-08-06 20:08:37,706 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 112, result has 27.7 percent of original size [2021-08-06 20:08:37,828 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 73.8 percent of original size [2021-08-06 20:08:37,830 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 73.8 percent of original size [2021-08-06 20:08:37,867 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:08:37,869 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:08:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:08:37,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:08:37,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277022746] [2021-08-06 20:08:37,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277022746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:37,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987079532] [2021-08-06 20:08:37,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:08:37,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:08:37,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:08:37,944 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 20:08:37,972 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 20:08:40,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:08:40,757 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-06 20:08:40,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:08:42,185 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:08:42,187 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:08:42,275 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:42,277 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:42,331 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:42,333 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:42,389 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:42,392 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:42,496 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 48.1 percent of original size [2021-08-06 20:08:42,498 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 48.1 percent of original size [2021-08-06 20:08:43,646 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:43,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987079532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:43,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:08:43,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-08-06 20:08:43,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840496208] [2021-08-06 20:08:43,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 20:08:43,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:08:43,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 20:08:43,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:08:43,647 INFO L87 Difference]: Start difference. First operand 540 states and 924 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:46,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:08:46,379 INFO L93 Difference]: Finished difference Result 665 states and 1089 transitions. [2021-08-06 20:08:46,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-08-06 20:08:46,380 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 20:08:46,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:08:46,381 INFO L225 Difference]: With dead ends: 665 [2021-08-06 20:08:46,381 INFO L226 Difference]: Without dead ends: 645 [2021-08-06 20:08:46,382 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2221 ImplicationChecksByTransitivity, 2466.4ms TimeCoverageRelationStatistics Valid=598, Invalid=6884, Unknown=0, NotChecked=0, Total=7482 [2021-08-06 20:08:46,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-08-06 20:08:46,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 477. [2021-08-06 20:08:46,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.7100840336134453) internal successors, (814), 476 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:46,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 814 transitions. [2021-08-06 20:08:46,387 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 814 transitions. Word has length 37 [2021-08-06 20:08:46,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:08:46,388 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 814 transitions. [2021-08-06 20:08:46,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:46,388 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 814 transitions. [2021-08-06 20:08:46,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 20:08:46,388 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:08:46,388 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:08:46,413 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 20:08:46,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:08:46,601 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:08:46,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:08:46,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1732730215, now seen corresponding path program 56 times [2021-08-06 20:08:46,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:08:46,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020283906] [2021-08-06 20:08:46,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:08:46,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:08:46,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:08:46,912 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 33.6 percent of original size [2021-08-06 20:08:46,916 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 33.6 percent of original size [2021-08-06 20:08:46,946 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 56.1 percent of original size [2021-08-06 20:08:46,947 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 56.1 percent of original size [2021-08-06 20:08:46,971 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 52.6 percent of original size [2021-08-06 20:08:46,972 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 52.6 percent of original size [2021-08-06 20:08:47,019 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 61.8 percent of original size [2021-08-06 20:08:47,021 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 61.8 percent of original size [2021-08-06 20:08:47,158 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:08:47,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:08:47,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020283906] [2021-08-06 20:08:47,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020283906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:47,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234246295] [2021-08-06 20:08:47,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:08:47,158 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:08:47,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:08:47,161 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 20:08:47,175 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 20:08:51,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:08:51,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:08:51,119 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-06 20:08:51,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:08:51,432 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:08:51,434 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:08:51,549 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:51,551 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:51,780 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:51,810 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:52,027 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:52,029 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:08:52,122 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 48.1 percent of original size [2021-08-06 20:08:52,125 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 48.1 percent of original size [2021-08-06 20:08:52,929 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:52,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234246295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:52,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:08:52,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-08-06 20:08:52,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228432668] [2021-08-06 20:08:52,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 20:08:52,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:08:52,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 20:08:52,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:08:52,938 INFO L87 Difference]: Start difference. First operand 477 states and 814 transitions. Second operand has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:56,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:08:56,975 INFO L93 Difference]: Finished difference Result 661 states and 1099 transitions. [2021-08-06 20:08:56,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-06 20:08:56,975 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 20:08:56,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:08:56,977 INFO L225 Difference]: With dead ends: 661 [2021-08-06 20:08:56,977 INFO L226 Difference]: Without dead ends: 649 [2021-08-06 20:08:56,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 4068.2ms TimeCoverageRelationStatistics Valid=822, Invalid=6660, Unknown=0, NotChecked=0, Total=7482 [2021-08-06 20:08:56,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-08-06 20:08:56,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 492. [2021-08-06 20:08:56,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 1.7087576374745417) internal successors, (839), 491 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:56,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 839 transitions. [2021-08-06 20:08:56,983 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 839 transitions. Word has length 37 [2021-08-06 20:08:56,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:08:56,983 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 839 transitions. [2021-08-06 20:08:56,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:56,983 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 839 transitions. [2021-08-06 20:08:56,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 20:08:56,984 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:08:56,984 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:08:57,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-06 20:08:57,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:08:57,205 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:08:57,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:08:57,205 INFO L82 PathProgramCache]: Analyzing trace with hash -125244305, now seen corresponding path program 57 times [2021-08-06 20:08:57,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:08:57,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454515017] [2021-08-06 20:08:57,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:08:57,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:08:57,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:08:57,420 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 121, result has 21.4 percent of original size [2021-08-06 20:08:57,448 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 121, result has 21.4 percent of original size [2021-08-06 20:08:57,493 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 87.9 percent of original size [2021-08-06 20:08:57,495 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 87.9 percent of original size [2021-08-06 20:08:57,527 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 88.2 percent of original size [2021-08-06 20:08:57,529 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 88.2 percent of original size [2021-08-06 20:08:57,553 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 87.9 percent of original size [2021-08-06 20:08:57,570 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 87.9 percent of original size [2021-08-06 20:08:57,578 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 86.7 percent of original size [2021-08-06 20:08:57,580 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 86.7 percent of original size [2021-08-06 20:08:57,598 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 87.1 percent of original size [2021-08-06 20:08:57,599 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 87.1 percent of original size [2021-08-06 20:08:57,631 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 87.5 percent of original size [2021-08-06 20:08:57,632 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 87.5 percent of original size [2021-08-06 20:08:57,660 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 86.2 percent of original size [2021-08-06 20:08:57,661 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 86.2 percent of original size [2021-08-06 20:08:57,689 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 77.4 percent of original size [2021-08-06 20:08:57,700 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 77.4 percent of original size [2021-08-06 20:08:57,754 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 82.5 percent of original size [2021-08-06 20:08:57,770 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 82.5 percent of original size [2021-08-06 20:08:57,809 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 81.6 percent of original size [2021-08-06 20:08:57,811 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 81.6 percent of original size [2021-08-06 20:08:57,948 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:57,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:08:57,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454515017] [2021-08-06 20:08:57,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454515017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:57,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901615467] [2021-08-06 20:08:57,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:08:57,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:08:57,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:08:57,950 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 20:08:57,979 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 20:09:00,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 20:09:00,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:09:00,961 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:09:00,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:09:01,178 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:01,180 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:01,265 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:01,267 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:01,310 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 41.7 percent of original size [2021-08-06 20:09:01,312 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 41.7 percent of original size [2021-08-06 20:09:01,534 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:09:01,536 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:09:01,863 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:09:01,865 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:09:02,287 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:02,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901615467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:02,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:09:02,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-06 20:09:02,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264758037] [2021-08-06 20:09:02,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-06 20:09:02,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:09:02,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-06 20:09:02,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:09:02,288 INFO L87 Difference]: Start difference. First operand 492 states and 839 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:09,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:09:09,148 INFO L93 Difference]: Finished difference Result 876 states and 1451 transitions. [2021-08-06 20:09:09,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-08-06 20:09:09,148 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 20:09:09,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:09:09,150 INFO L225 Difference]: With dead ends: 876 [2021-08-06 20:09:09,150 INFO L226 Difference]: Without dead ends: 864 [2021-08-06 20:09:09,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5563 ImplicationChecksByTransitivity, 6210.0ms TimeCoverageRelationStatistics Valid=1896, Invalid=13854, Unknown=0, NotChecked=0, Total=15750 [2021-08-06 20:09:09,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2021-08-06 20:09:09,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 547. [2021-08-06 20:09:09,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 1.7142857142857142) internal successors, (936), 546 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:09,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 936 transitions. [2021-08-06 20:09:09,163 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 936 transitions. Word has length 37 [2021-08-06 20:09:09,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:09:09,163 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 936 transitions. [2021-08-06 20:09:09,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:09,163 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 936 transitions. [2021-08-06 20:09:09,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:09:09,164 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:09:09,168 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:09:09,194 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 20:09:09,380 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,SelfDestructingSolverStorable58 [2021-08-06 20:09:09,381 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:09:09,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:09:09,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1408325519, now seen corresponding path program 58 times [2021-08-06 20:09:09,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:09:09,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764103270] [2021-08-06 20:09:09,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:09:09,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:09:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:09:09,897 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:09:09,901 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:09:09,935 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:09:09,938 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:09:10,002 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:10,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:09:10,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764103270] [2021-08-06 20:09:10,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764103270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:10,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375882271] [2021-08-06 20:09:10,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:09:10,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:09:10,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:09:10,009 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 20:09:10,033 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 20:09:13,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:09:13,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:09:13,201 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-06 20:09:13,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:09:14,442 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:14,444 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:14,489 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:14,491 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:14,539 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:14,542 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:14,588 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:14,590 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:14,637 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:14,639 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:14,716 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:09:14,719 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:09:14,858 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:14,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375882271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:14,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:09:14,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-06 20:09:14,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085820175] [2021-08-06 20:09:14,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-06 20:09:14,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:09:14,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-06 20:09:14,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1312, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:09:14,859 INFO L87 Difference]: Start difference. First operand 547 states and 936 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:17,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:09:17,603 INFO L93 Difference]: Finished difference Result 824 states and 1350 transitions. [2021-08-06 20:09:17,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-06 20:09:17,603 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 20:09:17,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:09:17,605 INFO L225 Difference]: With dead ends: 824 [2021-08-06 20:09:17,606 INFO L226 Difference]: Without dead ends: 788 [2021-08-06 20:09:17,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2356 ImplicationChecksByTransitivity, 3122.7ms TimeCoverageRelationStatistics Valid=1016, Invalid=7174, Unknown=0, NotChecked=0, Total=8190 [2021-08-06 20:09:17,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-08-06 20:09:17,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 665. [2021-08-06 20:09:17,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 1.7454819277108433) internal successors, (1159), 664 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:17,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1159 transitions. [2021-08-06 20:09:17,623 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1159 transitions. Word has length 39 [2021-08-06 20:09:17,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:09:17,623 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 1159 transitions. [2021-08-06 20:09:17,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:17,623 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1159 transitions. [2021-08-06 20:09:17,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:09:17,624 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:09:17,624 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:09:17,653 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 20:09:17,848 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,SelfDestructingSolverStorable59 [2021-08-06 20:09:17,849 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:09:17,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:09:17,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1941958543, now seen corresponding path program 59 times [2021-08-06 20:09:17,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:09:17,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713637650] [2021-08-06 20:09:17,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:09:17,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:09:17,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:09:18,245 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:09:18,249 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:09:18,281 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:09:18,284 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:09:18,348 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:18,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:09:18,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713637650] [2021-08-06 20:09:18,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713637650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:18,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682740145] [2021-08-06 20:09:18,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:09:18,349 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:09:18,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:09:18,349 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 20:09:18,352 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 20:09:21,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 20:09:21,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:09:21,450 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-06 20:09:21,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:09:22,126 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:22,128 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:22,237 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:22,239 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:22,284 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:22,286 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:22,331 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:22,348 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:22,394 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:22,396 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:22,475 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:09:22,478 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:09:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:22,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682740145] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:22,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:09:22,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-06 20:09:22,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793715833] [2021-08-06 20:09:22,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-06 20:09:22,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:09:22,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-06 20:09:22,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:09:22,701 INFO L87 Difference]: Start difference. First operand 665 states and 1159 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:24,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:09:24,950 INFO L93 Difference]: Finished difference Result 846 states and 1379 transitions. [2021-08-06 20:09:24,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-08-06 20:09:24,950 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 20:09:24,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:09:24,953 INFO L225 Difference]: With dead ends: 846 [2021-08-06 20:09:24,953 INFO L226 Difference]: Without dead ends: 814 [2021-08-06 20:09:24,953 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2687 ImplicationChecksByTransitivity, 2531.4ms TimeCoverageRelationStatistics Valid=1101, Invalid=8019, Unknown=0, NotChecked=0, Total=9120 [2021-08-06 20:09:24,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-08-06 20:09:24,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 667. [2021-08-06 20:09:24,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 1.7447447447447448) internal successors, (1162), 666 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:24,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1162 transitions. [2021-08-06 20:09:24,978 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1162 transitions. Word has length 39 [2021-08-06 20:09:24,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:09:24,978 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 1162 transitions. [2021-08-06 20:09:24,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:24,978 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1162 transitions. [2021-08-06 20:09:24,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:09:24,985 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:09:24,985 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:09:25,040 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 20:09:25,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:09:25,207 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:09:25,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:09:25,208 INFO L82 PathProgramCache]: Analyzing trace with hash 430667889, now seen corresponding path program 60 times [2021-08-06 20:09:25,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:09:25,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040763704] [2021-08-06 20:09:25,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:09:25,208 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:09:25,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:09:26,247 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:09:26,250 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:09:26,312 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:09:26,368 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:09:26,565 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:26,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:09:26,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040763704] [2021-08-06 20:09:26,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040763704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:26,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989875736] [2021-08-06 20:09:26,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:09:26,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:09:26,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:09:26,567 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 20:09:26,568 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 20:09:29,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 20:09:29,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:09:29,457 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-06 20:09:29,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:09:29,954 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:29,956 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:30,001 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:30,003 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:30,095 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:30,097 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:30,147 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:30,149 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:30,308 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:30,311 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:30,399 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:09:30,401 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:09:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:30,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989875736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:30,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:09:30,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-06 20:09:30,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426556415] [2021-08-06 20:09:30,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-06 20:09:30,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:09:30,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-06 20:09:30,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:09:30,570 INFO L87 Difference]: Start difference. First operand 667 states and 1162 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:33,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:09:33,671 INFO L93 Difference]: Finished difference Result 844 states and 1378 transitions. [2021-08-06 20:09:33,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-08-06 20:09:33,671 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 20:09:33,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:09:33,673 INFO L225 Difference]: With dead ends: 844 [2021-08-06 20:09:33,674 INFO L226 Difference]: Without dead ends: 816 [2021-08-06 20:09:33,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3014 ImplicationChecksByTransitivity, 3287.8ms TimeCoverageRelationStatistics Valid=1200, Invalid=8900, Unknown=0, NotChecked=0, Total=10100 [2021-08-06 20:09:33,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-08-06 20:09:33,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 669. [2021-08-06 20:09:33,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 1.7440119760479043) internal successors, (1165), 668 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:33,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1165 transitions. [2021-08-06 20:09:33,688 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1165 transitions. Word has length 39 [2021-08-06 20:09:33,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:09:33,688 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 1165 transitions. [2021-08-06 20:09:33,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:33,689 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1165 transitions. [2021-08-06 20:09:33,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:09:33,690 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:09:33,690 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:09:33,721 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 20:09:33,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:09:33,917 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:09:33,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:09:33,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1523638385, now seen corresponding path program 61 times [2021-08-06 20:09:33,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:09:33,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321672383] [2021-08-06 20:09:33,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:09:33,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:09:33,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:09:34,316 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:09:34,320 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:09:34,355 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:09:34,358 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:09:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:34,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:09:34,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321672383] [2021-08-06 20:09:34,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321672383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:34,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231179781] [2021-08-06 20:09:34,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:09:34,434 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:09:34,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:09:34,437 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 20:09:34,438 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 20:09:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:09:37,801 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-06 20:09:37,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:09:38,500 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:38,502 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:38,547 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:38,549 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:38,596 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:38,598 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:38,939 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:38,941 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:38,990 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:38,992 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:39,071 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:09:39,073 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:09:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:39,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231179781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:39,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:09:39,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-06 20:09:39,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931133591] [2021-08-06 20:09:39,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-06 20:09:39,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:09:39,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-06 20:09:39,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:09:39,236 INFO L87 Difference]: Start difference. First operand 669 states and 1165 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:42,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:09:42,078 INFO L93 Difference]: Finished difference Result 842 states and 1377 transitions. [2021-08-06 20:09:42,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-08-06 20:09:42,078 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 20:09:42,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:09:42,080 INFO L225 Difference]: With dead ends: 842 [2021-08-06 20:09:42,080 INFO L226 Difference]: Without dead ends: 818 [2021-08-06 20:09:42,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3358 ImplicationChecksByTransitivity, 3190.4ms TimeCoverageRelationStatistics Valid=1324, Invalid=9806, Unknown=0, NotChecked=0, Total=11130 [2021-08-06 20:09:42,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-08-06 20:09:42,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 671. [2021-08-06 20:09:42,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 1.7432835820895523) internal successors, (1168), 670 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:42,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1168 transitions. [2021-08-06 20:09:42,095 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1168 transitions. Word has length 39 [2021-08-06 20:09:42,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:09:42,095 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 1168 transitions. [2021-08-06 20:09:42,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:42,096 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1168 transitions. [2021-08-06 20:09:42,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:09:42,096 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:09:42,096 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:09:42,123 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 20:09:42,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:09:42,321 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:09:42,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:09:42,322 INFO L82 PathProgramCache]: Analyzing trace with hash -164607887, now seen corresponding path program 62 times [2021-08-06 20:09:42,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:09:42,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323156116] [2021-08-06 20:09:42,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:09:42,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:09:42,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:09:42,615 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:09:42,619 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:09:42,673 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:09:42,676 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:09:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:42,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:09:42,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323156116] [2021-08-06 20:09:42,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323156116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:42,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592739523] [2021-08-06 20:09:42,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:09:42,736 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:09:42,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:09:42,736 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 20:09:42,737 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 20:09:45,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:09:45,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:09:45,708 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-06 20:09:45,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:09:46,161 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:46,163 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:46,207 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:46,209 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:46,261 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:46,263 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:46,309 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:46,311 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:46,405 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:46,407 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:09:46,484 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:09:46,486 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:09:46,625 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:46,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592739523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:46,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:09:46,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-06 20:09:46,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10117299] [2021-08-06 20:09:46,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-06 20:09:46,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:09:46,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-06 20:09:46,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1312, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:09:46,626 INFO L87 Difference]: Start difference. First operand 671 states and 1168 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:48,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:09:48,977 INFO L93 Difference]: Finished difference Result 841 states and 1377 transitions. [2021-08-06 20:09:48,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-08-06 20:09:48,978 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 20:09:48,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:09:48,979 INFO L225 Difference]: With dead ends: 841 [2021-08-06 20:09:48,979 INFO L226 Difference]: Without dead ends: 821 [2021-08-06 20:09:48,980 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3716 ImplicationChecksByTransitivity, 2380.3ms TimeCoverageRelationStatistics Valid=1473, Invalid=10737, Unknown=0, NotChecked=0, Total=12210 [2021-08-06 20:09:48,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2021-08-06 20:09:48,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 673. [2021-08-06 20:09:48,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 1.7425595238095237) internal successors, (1171), 672 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:48,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1171 transitions. [2021-08-06 20:09:48,992 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1171 transitions. Word has length 39 [2021-08-06 20:09:48,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:09:48,992 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 1171 transitions. [2021-08-06 20:09:48,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:48,992 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1171 transitions. [2021-08-06 20:09:48,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:09:48,993 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:09:48,993 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:09:49,018 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 20:09:49,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:09:49,201 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:09:49,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:09:49,201 INFO L82 PathProgramCache]: Analyzing trace with hash 843690097, now seen corresponding path program 63 times [2021-08-06 20:09:49,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:09:49,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751879568] [2021-08-06 20:09:49,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:09:49,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:09:49,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:09:49,419 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:09:49,423 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:09:49,453 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:09:49,457 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:09:49,486 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:09:49,489 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:09:49,573 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:49,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:09:49,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751879568] [2021-08-06 20:09:49,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751879568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:49,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067919079] [2021-08-06 20:09:49,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:09:49,573 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:09:49,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:09:49,575 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 20:09:49,576 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 20:09:52,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 20:09:52,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:09:52,510 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-06 20:09:52,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:09:54,259 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:54,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067919079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:54,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:09:54,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-06 20:09:54,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034867385] [2021-08-06 20:09:54,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-06 20:09:54,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:09:54,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-06 20:09:54,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1357, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:09:54,260 INFO L87 Difference]: Start difference. First operand 673 states and 1171 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:58,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:09:58,407 INFO L93 Difference]: Finished difference Result 893 states and 1453 transitions. [2021-08-06 20:09:58,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-08-06 20:09:58,407 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 20:09:58,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:09:58,409 INFO L225 Difference]: With dead ends: 893 [2021-08-06 20:09:58,409 INFO L226 Difference]: Without dead ends: 869 [2021-08-06 20:09:58,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4716 ImplicationChecksByTransitivity, 3871.8ms TimeCoverageRelationStatistics Valid=1685, Invalid=14827, Unknown=0, NotChecked=0, Total=16512 [2021-08-06 20:09:58,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-08-06 20:09:58,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 681. [2021-08-06 20:09:58,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 1.7426470588235294) internal successors, (1185), 680 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:58,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1185 transitions. [2021-08-06 20:09:58,416 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1185 transitions. Word has length 39 [2021-08-06 20:09:58,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:09:58,416 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 1185 transitions. [2021-08-06 20:09:58,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:58,417 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1185 transitions. [2021-08-06 20:09:58,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:09:58,417 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:09:58,417 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:09:58,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-08-06 20:09:58,618 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,SelfDestructingSolverStorable64 [2021-08-06 20:09:58,618 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:09:58,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:09:58,618 INFO L82 PathProgramCache]: Analyzing trace with hash -174253967, now seen corresponding path program 64 times [2021-08-06 20:09:58,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:09:58,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407496684] [2021-08-06 20:09:58,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:09:58,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:09:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:09:58,851 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 50, result has 65.8 percent of original size [2021-08-06 20:09:58,858 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 50, result has 65.8 percent of original size [2021-08-06 20:09:58,903 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 50, result has 66.2 percent of original size [2021-08-06 20:09:58,910 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 50, result has 66.2 percent of original size [2021-08-06 20:09:59,004 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:59,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:09:59,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407496684] [2021-08-06 20:09:59,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407496684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:59,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440644399] [2021-08-06 20:09:59,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:09:59,005 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:09:59,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:09:59,006 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 20:09:59,006 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 20:10:02,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:10:02,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:10:02,109 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-06 20:10:02,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:02,649 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:02,652 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:02,710 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:02,712 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:02,767 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:02,772 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:02,819 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:02,821 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:02,868 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:02,870 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:02,949 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:02,951 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:03,164 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:03,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440644399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:03,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:03,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-06 20:10:03,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882076359] [2021-08-06 20:10:03,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-06 20:10:03,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:03,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-06 20:10:03,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1294, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:10:03,165 INFO L87 Difference]: Start difference. First operand 681 states and 1185 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:06,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:06,154 INFO L93 Difference]: Finished difference Result 855 states and 1412 transitions. [2021-08-06 20:10:06,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-08-06 20:10:06,154 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 20:10:06,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:06,156 INFO L225 Difference]: With dead ends: 855 [2021-08-06 20:10:06,156 INFO L226 Difference]: Without dead ends: 845 [2021-08-06 20:10:06,156 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3396 ImplicationChecksByTransitivity, 2884.1ms TimeCoverageRelationStatistics Valid=1552, Invalid=9790, Unknown=0, NotChecked=0, Total=11342 [2021-08-06 20:10:06,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-08-06 20:10:06,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 681. [2021-08-06 20:10:06,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 1.7426470588235294) internal successors, (1185), 680 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:06,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1185 transitions. [2021-08-06 20:10:06,163 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1185 transitions. Word has length 39 [2021-08-06 20:10:06,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:06,163 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 1185 transitions. [2021-08-06 20:10:06,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:06,163 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1185 transitions. [2021-08-06 20:10:06,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:10:06,164 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:06,164 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:10:06,191 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 20:10:06,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:06,388 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:10:06,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:06,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1593710573, now seen corresponding path program 65 times [2021-08-06 20:10:06,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:06,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165031441] [2021-08-06 20:10:06,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:06,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:06,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:06,746 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:10:06,750 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:10:06,787 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:10:06,791 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:10:06,858 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:06,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:06,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165031441] [2021-08-06 20:10:06,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165031441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:06,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372648045] [2021-08-06 20:10:06,858 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:10:06,858 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:06,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:06,859 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 20:10:06,860 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 20:10:10,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 20:10:10,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:10:10,029 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-06 20:10:10,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:10,429 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:10,431 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:10,486 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:10,488 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:10,640 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:10,642 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:10,695 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:10,698 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:10,754 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:10,756 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:10,831 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:10,833 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:10,974 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:10,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372648045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:10,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:10,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-06 20:10:10,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911854687] [2021-08-06 20:10:10,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-06 20:10:10,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:10,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-06 20:10:10,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1311, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:10:10,975 INFO L87 Difference]: Start difference. First operand 681 states and 1185 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:12,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:12,959 INFO L93 Difference]: Finished difference Result 846 states and 1386 transitions. [2021-08-06 20:10:12,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-08-06 20:10:12,959 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 20:10:12,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:12,961 INFO L225 Difference]: With dead ends: 846 [2021-08-06 20:10:12,961 INFO L226 Difference]: Without dead ends: 818 [2021-08-06 20:10:12,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2716 ImplicationChecksByTransitivity, 2064.8ms TimeCoverageRelationStatistics Valid=1035, Invalid=8085, Unknown=0, NotChecked=0, Total=9120 [2021-08-06 20:10:12,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-08-06 20:10:12,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 685. [2021-08-06 20:10:12,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 1.7426900584795322) internal successors, (1192), 684 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:12,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 1192 transitions. [2021-08-06 20:10:12,968 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 1192 transitions. Word has length 39 [2021-08-06 20:10:12,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:12,968 INFO L470 AbstractCegarLoop]: Abstraction has 685 states and 1192 transitions. [2021-08-06 20:10:12,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:12,968 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 1192 transitions. [2021-08-06 20:10:12,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:10:12,968 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:12,969 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:10:12,994 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 20:10:13,169 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,SelfDestructingSolverStorable66 [2021-08-06 20:10:13,169 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:10:13,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:13,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1608286227, now seen corresponding path program 66 times [2021-08-06 20:10:13,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:13,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144006783] [2021-08-06 20:10:13,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:13,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:13,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:13,404 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:10:13,408 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:10:13,437 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:10:13,458 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:10:13,515 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:13,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:13,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144006783] [2021-08-06 20:10:13,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144006783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:13,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553709615] [2021-08-06 20:10:13,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:10:13,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:13,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:13,517 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 20:10:13,517 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 20:10:16,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 20:10:16,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:10:16,743 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-06 20:10:16,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:17,151 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:17,153 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:17,207 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:17,209 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:17,301 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:17,303 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:17,395 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:17,397 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:17,444 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:17,446 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:17,521 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:17,523 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:17,676 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:17,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553709615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:17,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:17,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-06 20:10:17,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592750373] [2021-08-06 20:10:17,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-06 20:10:17,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:17,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-06 20:10:17,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1309, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:10:17,677 INFO L87 Difference]: Start difference. First operand 685 states and 1192 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:20,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:20,149 INFO L93 Difference]: Finished difference Result 870 states and 1431 transitions. [2021-08-06 20:10:20,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-08-06 20:10:20,149 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 20:10:20,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:20,150 INFO L225 Difference]: With dead ends: 870 [2021-08-06 20:10:20,150 INFO L226 Difference]: Without dead ends: 846 [2021-08-06 20:10:20,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3039 ImplicationChecksByTransitivity, 2417.0ms TimeCoverageRelationStatistics Valid=1167, Invalid=8933, Unknown=0, NotChecked=0, Total=10100 [2021-08-06 20:10:20,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-08-06 20:10:20,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 695. [2021-08-06 20:10:20,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 1.7564841498559078) internal successors, (1219), 694 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:20,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1219 transitions. [2021-08-06 20:10:20,157 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1219 transitions. Word has length 39 [2021-08-06 20:10:20,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:20,157 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 1219 transitions. [2021-08-06 20:10:20,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:20,157 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1219 transitions. [2021-08-06 20:10:20,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:10:20,158 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:20,158 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:10:20,187 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 20:10:20,360 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,SelfDestructingSolverStorable67 [2021-08-06 20:10:20,361 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:10:20,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:20,361 INFO L82 PathProgramCache]: Analyzing trace with hash 998434797, now seen corresponding path program 67 times [2021-08-06 20:10:20,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:20,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532498980] [2021-08-06 20:10:20,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:20,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:20,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:20,708 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:10:20,712 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:10:20,745 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:10:20,748 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:10:20,813 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:20,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:20,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532498980] [2021-08-06 20:10:20,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532498980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:20,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863960292] [2021-08-06 20:10:20,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:10:20,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:20,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:20,814 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 20:10:20,815 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 20:10:24,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:24,261 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-06 20:10:24,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:24,683 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:24,688 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:24,741 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:24,744 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:24,850 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:24,853 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:24,902 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:24,904 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:25,000 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:25,003 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:25,080 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:25,083 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:25,222 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:25,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863960292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:25,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:25,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-06 20:10:25,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827431720] [2021-08-06 20:10:25,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-06 20:10:25,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:25,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-06 20:10:25,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1303, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:10:25,223 INFO L87 Difference]: Start difference. First operand 695 states and 1219 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:27,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:27,864 INFO L93 Difference]: Finished difference Result 894 states and 1478 transitions. [2021-08-06 20:10:27,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-08-06 20:10:27,864 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 20:10:27,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:27,865 INFO L225 Difference]: With dead ends: 894 [2021-08-06 20:10:27,865 INFO L226 Difference]: Without dead ends: 874 [2021-08-06 20:10:27,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3376 ImplicationChecksByTransitivity, 2532.5ms TimeCoverageRelationStatistics Valid=1316, Invalid=9814, Unknown=0, NotChecked=0, Total=11130 [2021-08-06 20:10:27,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-08-06 20:10:27,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 713. [2021-08-06 20:10:27,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 1.7612359550561798) internal successors, (1254), 712 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:27,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1254 transitions. [2021-08-06 20:10:27,873 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1254 transitions. Word has length 39 [2021-08-06 20:10:27,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:27,873 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 1254 transitions. [2021-08-06 20:10:27,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:27,873 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1254 transitions. [2021-08-06 20:10:27,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:10:27,874 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:27,874 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:10:27,902 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 20:10:28,074 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,SelfDestructingSolverStorable68 [2021-08-06 20:10:28,075 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:10:28,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:28,075 INFO L82 PathProgramCache]: Analyzing trace with hash 2006732781, now seen corresponding path program 68 times [2021-08-06 20:10:28,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:28,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818642873] [2021-08-06 20:10:28,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:28,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:28,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:28,291 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:10:28,295 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:10:28,326 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:10:28,329 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:10:28,357 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:10:28,360 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:10:28,460 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:28,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:28,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818642873] [2021-08-06 20:10:28,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818642873] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:28,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621384491] [2021-08-06 20:10:28,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:10:28,460 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:28,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:28,461 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 20:10:28,463 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 20:10:31,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:10:31,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:10:31,907 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-06 20:10:31,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:32,308 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:32,310 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:32,370 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:32,378 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:32,478 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:32,480 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:32,530 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:32,532 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:32,595 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:32,597 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:32,740 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:32,742 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:32,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621384491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:32,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:32,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-06 20:10:32,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146165736] [2021-08-06 20:10:32,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-06 20:10:32,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:32,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-06 20:10:32,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:10:32,888 INFO L87 Difference]: Start difference. First operand 713 states and 1254 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:37,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:37,210 INFO L93 Difference]: Finished difference Result 958 states and 1577 transitions. [2021-08-06 20:10:37,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-08-06 20:10:37,210 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 20:10:37,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:37,212 INFO L225 Difference]: With dead ends: 958 [2021-08-06 20:10:37,212 INFO L226 Difference]: Without dead ends: 932 [2021-08-06 20:10:37,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3507 ImplicationChecksByTransitivity, 3664.6ms TimeCoverageRelationStatistics Valid=1399, Invalid=10157, Unknown=0, NotChecked=0, Total=11556 [2021-08-06 20:10:37,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2021-08-06 20:10:37,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 722. [2021-08-06 20:10:37,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 721 states have (on average 1.7600554785020806) internal successors, (1269), 721 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:37,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 1269 transitions. [2021-08-06 20:10:37,234 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 1269 transitions. Word has length 39 [2021-08-06 20:10:37,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:37,234 INFO L470 AbstractCegarLoop]: Abstraction has 722 states and 1269 transitions. [2021-08-06 20:10:37,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:37,234 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 1269 transitions. [2021-08-06 20:10:37,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:10:37,235 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:37,235 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:10:37,315 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 20:10:37,444 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,SelfDestructingSolverStorable69 [2021-08-06 20:10:37,445 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:10:37,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:37,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1657975127, now seen corresponding path program 69 times [2021-08-06 20:10:37,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:37,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345900147] [2021-08-06 20:10:37,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:37,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:37,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:37,804 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:10:37,808 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:10:37,838 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:10:37,842 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:10:37,912 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:37,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:37,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345900147] [2021-08-06 20:10:37,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345900147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:37,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078000780] [2021-08-06 20:10:37,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:10:37,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:37,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:37,913 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 20:10:37,940 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 20:10:41,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 20:10:41,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:10:41,588 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-06 20:10:41,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:45,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078000780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:45,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:45,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-06 20:10:45,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485015105] [2021-08-06 20:10:45,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-06 20:10:45,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:45,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-06 20:10:45,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:10:45,523 INFO L87 Difference]: Start difference. First operand 722 states and 1269 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:49,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:49,781 INFO L93 Difference]: Finished difference Result 868 states and 1445 transitions. [2021-08-06 20:10:49,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-08-06 20:10:49,781 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 20:10:49,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:49,783 INFO L225 Difference]: With dead ends: 868 [2021-08-06 20:10:49,783 INFO L226 Difference]: Without dead ends: 844 [2021-08-06 20:10:49,784 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3157 ImplicationChecksByTransitivity, 4617.2ms TimeCoverageRelationStatistics Valid=1164, Invalid=10608, Unknown=0, NotChecked=0, Total=11772 [2021-08-06 20:10:49,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-08-06 20:10:49,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 725. [2021-08-06 20:10:49,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 724 states have (on average 1.7596685082872927) internal successors, (1274), 724 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:49,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1274 transitions. [2021-08-06 20:10:49,791 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1274 transitions. Word has length 39 [2021-08-06 20:10:49,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:49,791 INFO L470 AbstractCegarLoop]: Abstraction has 725 states and 1274 transitions. [2021-08-06 20:10:49,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:49,791 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1274 transitions. [2021-08-06 20:10:49,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:10:49,792 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:49,792 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:10:49,832 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 20:10:50,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:50,013 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:10:50,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:50,013 INFO L82 PathProgramCache]: Analyzing trace with hash 948745897, now seen corresponding path program 70 times [2021-08-06 20:10:50,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:50,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082545152] [2021-08-06 20:10:50,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:50,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:50,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:50,441 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:10:50,445 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:10:50,483 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:10:50,487 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:10:50,551 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:50,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:50,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082545152] [2021-08-06 20:10:50,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082545152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:50,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406941458] [2021-08-06 20:10:50,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:10:50,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:50,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:50,552 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 20:10:50,553 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 20:10:54,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:10:54,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:10:54,566 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-06 20:10:54,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:56,067 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:56,070 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:56,124 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:56,127 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:56,182 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:56,184 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:56,278 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:56,280 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:56,488 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:56,490 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:10:56,576 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:56,579 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:10:56,750 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:56,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406941458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:56,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:56,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-06 20:10:56,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531520338] [2021-08-06 20:10:56,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-06 20:10:56,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:56,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-06 20:10:56,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:10:56,751 INFO L87 Difference]: Start difference. First operand 725 states and 1274 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:00,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:00,998 INFO L93 Difference]: Finished difference Result 897 states and 1496 transitions. [2021-08-06 20:11:00,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-08-06 20:11:00,999 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 20:11:00,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:01,000 INFO L225 Difference]: With dead ends: 897 [2021-08-06 20:11:01,000 INFO L226 Difference]: Without dead ends: 877 [2021-08-06 20:11:01,001 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3498 ImplicationChecksByTransitivity, 4296.7ms TimeCoverageRelationStatistics Valid=1317, Invalid=10025, Unknown=0, NotChecked=0, Total=11342 [2021-08-06 20:11:01,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-08-06 20:11:01,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 733. [2021-08-06 20:11:01,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 1.7691256830601092) internal successors, (1295), 732 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:01,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1295 transitions. [2021-08-06 20:11:01,017 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1295 transitions. Word has length 39 [2021-08-06 20:11:01,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:01,017 INFO L470 AbstractCegarLoop]: Abstraction has 733 states and 1295 transitions. [2021-08-06 20:11:01,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:01,018 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1295 transitions. [2021-08-06 20:11:01,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:11:01,018 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:01,018 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:01,047 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 20:11:01,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:01,233 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:11:01,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:01,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1957043881, now seen corresponding path program 71 times [2021-08-06 20:11:01,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:01,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7462149] [2021-08-06 20:11:01,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:01,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:01,828 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:11:01,832 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:11:01,866 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:11:01,870 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:11:01,899 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:11:01,902 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:11:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:01,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:01,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7462149] [2021-08-06 20:11:01,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7462149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:01,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575047632] [2021-08-06 20:11:01,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:11:01,963 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:01,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:01,964 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 20:11:01,988 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 20:11:05,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 20:11:05,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:05,863 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-06 20:11:05,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:06,256 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:06,259 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:06,312 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:06,317 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:06,372 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:06,375 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:06,480 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:11:06,483 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:11:06,537 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:11:06,539 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:11:06,667 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:06,669 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:06,819 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:06,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575047632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:06,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:06,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-06 20:11:06,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768916343] [2021-08-06 20:11:06,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-06 20:11:06,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:06,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-06 20:11:06,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:11:06,820 INFO L87 Difference]: Start difference. First operand 733 states and 1295 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:10,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:10,148 INFO L93 Difference]: Finished difference Result 969 states and 1609 transitions. [2021-08-06 20:11:10,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-08-06 20:11:10,148 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 20:11:10,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:10,150 INFO L225 Difference]: With dead ends: 969 [2021-08-06 20:11:10,150 INFO L226 Difference]: Without dead ends: 943 [2021-08-06 20:11:10,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3624 ImplicationChecksByTransitivity, 2783.5ms TimeCoverageRelationStatistics Valid=1412, Invalid=10360, Unknown=0, NotChecked=0, Total=11772 [2021-08-06 20:11:10,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-08-06 20:11:10,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 706. [2021-08-06 20:11:10,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 1.750354609929078) internal successors, (1234), 705 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:10,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1234 transitions. [2021-08-06 20:11:10,158 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1234 transitions. Word has length 39 [2021-08-06 20:11:10,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:10,158 INFO L470 AbstractCegarLoop]: Abstraction has 706 states and 1234 transitions. [2021-08-06 20:11:10,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:10,158 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1234 transitions. [2021-08-06 20:11:10,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:11:10,159 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:10,159 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:10,189 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 20:11:10,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:10,373 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:11:10,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:10,374 INFO L82 PathProgramCache]: Analyzing trace with hash -168623003, now seen corresponding path program 72 times [2021-08-06 20:11:10,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:10,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243111944] [2021-08-06 20:11:10,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:10,374 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:10,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:10,626 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:11:10,630 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:11:10,659 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:11:10,662 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:11:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:10,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:10,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243111944] [2021-08-06 20:11:10,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243111944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:10,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37022350] [2021-08-06 20:11:10,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:11:10,720 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:10,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:10,721 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 20:11:10,721 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 20:11:14,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 20:11:14,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:14,350 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-06 20:11:14,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:14,767 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:14,770 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:14,824 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:14,826 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:14,880 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:14,882 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:15,641 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:15,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37022350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:15,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:15,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-06 20:11:15,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795786203] [2021-08-06 20:11:15,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-06 20:11:15,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:15,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-06 20:11:15,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1312, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:11:15,642 INFO L87 Difference]: Start difference. First operand 706 states and 1234 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:18,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:18,474 INFO L93 Difference]: Finished difference Result 837 states and 1392 transitions. [2021-08-06 20:11:18,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-08-06 20:11:18,474 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 20:11:18,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:18,476 INFO L225 Difference]: With dead ends: 837 [2021-08-06 20:11:18,476 INFO L226 Difference]: Without dead ends: 817 [2021-08-06 20:11:18,477 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3548 ImplicationChecksByTransitivity, 2755.6ms TimeCoverageRelationStatistics Valid=1299, Invalid=10691, Unknown=0, NotChecked=0, Total=11990 [2021-08-06 20:11:18,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-08-06 20:11:18,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 709. [2021-08-06 20:11:18,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 708 states have (on average 1.75) internal successors, (1239), 708 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:18,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 1239 transitions. [2021-08-06 20:11:18,483 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 1239 transitions. Word has length 39 [2021-08-06 20:11:18,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:18,483 INFO L470 AbstractCegarLoop]: Abstraction has 709 states and 1239 transitions. [2021-08-06 20:11:18,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:18,483 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 1239 transitions. [2021-08-06 20:11:18,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:11:18,484 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:18,484 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:18,513 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 20:11:18,700 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,SelfDestructingSolverStorable73 [2021-08-06 20:11:18,701 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:11:18,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:18,701 INFO L82 PathProgramCache]: Analyzing trace with hash 839674981, now seen corresponding path program 73 times [2021-08-06 20:11:18,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:18,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875140253] [2021-08-06 20:11:18,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:18,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:18,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:18,926 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:11:18,930 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:11:18,960 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:11:18,964 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:11:18,993 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:11:18,996 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:11:19,053 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:19,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:19,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875140253] [2021-08-06 20:11:19,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875140253] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:19,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257058592] [2021-08-06 20:11:19,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:11:19,054 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:19,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:19,054 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 20:11:19,055 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 20:11:22,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:22,739 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-06 20:11:22,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:23,135 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:23,137 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:23,191 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:23,194 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:23,248 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:23,250 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:23,305 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:23,308 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:23,400 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:11:23,402 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:11:23,529 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:23,531 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:23,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257058592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:23,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:23,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-06 20:11:23,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037347] [2021-08-06 20:11:23,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-06 20:11:23,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:23,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-06 20:11:23,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1286, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:11:23,909 INFO L87 Difference]: Start difference. First operand 709 states and 1239 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:26,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:26,411 INFO L93 Difference]: Finished difference Result 905 states and 1489 transitions. [2021-08-06 20:11:26,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-08-06 20:11:26,412 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 20:11:26,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:26,413 INFO L225 Difference]: With dead ends: 905 [2021-08-06 20:11:26,413 INFO L226 Difference]: Without dead ends: 879 [2021-08-06 20:11:26,414 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3749 ImplicationChecksByTransitivity, 2627.7ms TimeCoverageRelationStatistics Valid=1411, Invalid=10579, Unknown=0, NotChecked=0, Total=11990 [2021-08-06 20:11:26,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2021-08-06 20:11:26,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 690. [2021-08-06 20:11:26,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 689 states have (on average 1.7343976777939043) internal successors, (1195), 689 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:26,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1195 transitions. [2021-08-06 20:11:26,421 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1195 transitions. Word has length 39 [2021-08-06 20:11:26,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:26,421 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 1195 transitions. [2021-08-06 20:11:26,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:26,421 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1195 transitions. [2021-08-06 20:11:26,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:11:26,422 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:26,422 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:26,451 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 20:11:26,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:26,622 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:11:26,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:26,623 INFO L82 PathProgramCache]: Analyzing trace with hash -891094751, now seen corresponding path program 74 times [2021-08-06 20:11:26,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:26,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622512581] [2021-08-06 20:11:26,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:26,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:26,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:26,800 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 32.0 percent of original size [2021-08-06 20:11:26,803 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 32.0 percent of original size [2021-08-06 20:11:26,854 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 60.0 percent of original size [2021-08-06 20:11:26,856 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 60.0 percent of original size [2021-08-06 20:11:26,880 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 55.6 percent of original size [2021-08-06 20:11:26,881 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 55.6 percent of original size [2021-08-06 20:11:26,903 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 51.5 percent of original size [2021-08-06 20:11:26,904 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 51.5 percent of original size [2021-08-06 20:11:26,955 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:26,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:26,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622512581] [2021-08-06 20:11:26,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622512581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:26,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583089900] [2021-08-06 20:11:26,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:11:26,956 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:26,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:26,956 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 20:11:26,957 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 20:11:30,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:11:30,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:30,802 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-06 20:11:30,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:31,207 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:31,209 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:31,264 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:31,267 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:31,321 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:31,324 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:31,379 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:31,381 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:31,437 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:31,440 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:31,610 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:31,612 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:31,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583089900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:31,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:31,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-06 20:11:31,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028444904] [2021-08-06 20:11:31,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-06 20:11:31,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:31,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-06 20:11:31,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1284, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:11:31,756 INFO L87 Difference]: Start difference. First operand 690 states and 1195 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:35,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:35,311 INFO L93 Difference]: Finished difference Result 962 states and 1582 transitions. [2021-08-06 20:11:35,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-08-06 20:11:35,311 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 20:11:35,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:35,313 INFO L225 Difference]: With dead ends: 962 [2021-08-06 20:11:35,313 INFO L226 Difference]: Without dead ends: 944 [2021-08-06 20:11:35,315 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5081 ImplicationChecksByTransitivity, 3471.3ms TimeCoverageRelationStatistics Valid=1694, Invalid=13558, Unknown=0, NotChecked=0, Total=15252 [2021-08-06 20:11:35,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2021-08-06 20:11:35,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 651. [2021-08-06 20:11:35,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 1.716923076923077) internal successors, (1116), 650 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:35,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1116 transitions. [2021-08-06 20:11:35,321 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1116 transitions. Word has length 39 [2021-08-06 20:11:35,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:35,321 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 1116 transitions. [2021-08-06 20:11:35,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:35,322 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1116 transitions. [2021-08-06 20:11:35,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 20:11:35,322 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:35,322 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:35,356 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 20:11:35,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:35,523 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:11:35,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:35,523 INFO L82 PathProgramCache]: Analyzing trace with hash 2025367579, now seen corresponding path program 75 times [2021-08-06 20:11:35,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:35,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009040626] [2021-08-06 20:11:35,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:35,523 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:36,073 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 20:11:36,075 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 20:11:36,104 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 20:11:36,105 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 20:11:36,130 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:11:36,131 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:11:36,154 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:36,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:36,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009040626] [2021-08-06 20:11:36,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009040626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:36,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492696309] [2021-08-06 20:11:36,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:11:36,155 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:36,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:36,157 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 20:11:36,177 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 20:11:40,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 20:11:40,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:40,526 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 61 conjunts are in the unsatisfiable core [2021-08-06 20:11:40,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:41,043 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:41,045 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:41,123 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:41,125 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:41,182 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:41,185 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:41,242 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:41,244 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:41,303 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:41,305 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:41,431 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 55.6 percent of original size [2021-08-06 20:11:41,434 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 55.6 percent of original size [2021-08-06 20:11:41,891 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:41,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492696309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:41,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:41,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2021-08-06 20:11:41,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464697593] [2021-08-06 20:11:41,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-06 20:11:41,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:41,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-06 20:11:41,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1421, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:11:41,892 INFO L87 Difference]: Start difference. First operand 651 states and 1116 transitions. Second operand has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:44,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:44,916 INFO L93 Difference]: Finished difference Result 1026 states and 1674 transitions. [2021-08-06 20:11:44,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-08-06 20:11:44,917 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 20:11:44,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:44,918 INFO L225 Difference]: With dead ends: 1026 [2021-08-06 20:11:44,918 INFO L226 Difference]: Without dead ends: 998 [2021-08-06 20:11:44,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3224 ImplicationChecksByTransitivity, 2793.3ms TimeCoverageRelationStatistics Valid=1447, Invalid=9683, Unknown=0, NotChecked=0, Total=11130 [2021-08-06 20:11:44,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-08-06 20:11:44,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 680. [2021-08-06 20:11:44,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 1.7231222385861562) internal successors, (1170), 679 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:44,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 1170 transitions. [2021-08-06 20:11:44,927 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 1170 transitions. Word has length 41 [2021-08-06 20:11:44,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:44,927 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 1170 transitions. [2021-08-06 20:11:44,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:44,927 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 1170 transitions. [2021-08-06 20:11:44,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 20:11:44,928 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:44,928 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:45,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-06 20:11:45,132 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,SelfDestructingSolverStorable76 [2021-08-06 20:11:45,132 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:11:45,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:45,132 INFO L82 PathProgramCache]: Analyzing trace with hash -87190861, now seen corresponding path program 76 times [2021-08-06 20:11:45,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:45,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124233948] [2021-08-06 20:11:45,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:45,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:45,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:45,367 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 20:11:45,368 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 20:11:45,391 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 20:11:45,392 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 20:11:45,410 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:11:45,411 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:11:45,428 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:45,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:45,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124233948] [2021-08-06 20:11:45,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124233948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:45,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196581972] [2021-08-06 20:11:45,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:11:45,429 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:45,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:45,429 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 20:11:45,430 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 20:11:49,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:11:49,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:49,681 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 61 conjunts are in the unsatisfiable core [2021-08-06 20:11:49,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:50,388 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:11:50,390 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:11:50,436 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:11:50,438 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:11:50,495 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:11:50,497 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:11:50,543 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:11:50,549 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:11:50,641 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:11:50,643 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:11:50,737 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:50,740 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:11:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:51,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196581972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:51,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:51,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 35 [2021-08-06 20:11:51,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867210234] [2021-08-06 20:11:51,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 20:11:51,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:51,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 20:11:51,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:11:51,023 INFO L87 Difference]: Start difference. First operand 680 states and 1170 transitions. Second operand has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:56,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:56,665 INFO L93 Difference]: Finished difference Result 1278 states and 2049 transitions. [2021-08-06 20:11:56,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-08-06 20:11:56,665 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 20:11:56,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:56,678 INFO L225 Difference]: With dead ends: 1278 [2021-08-06 20:11:56,678 INFO L226 Difference]: Without dead ends: 1236 [2021-08-06 20:11:56,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8726 ImplicationChecksByTransitivity, 5305.7ms TimeCoverageRelationStatistics Valid=2818, Invalid=20744, Unknown=0, NotChecked=0, Total=23562 [2021-08-06 20:11:56,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2021-08-06 20:11:56,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 727. [2021-08-06 20:11:56,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 1.7327823691460056) internal successors, (1258), 726 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:56,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 1258 transitions. [2021-08-06 20:11:56,688 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 1258 transitions. Word has length 41 [2021-08-06 20:11:56,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:56,688 INFO L470 AbstractCegarLoop]: Abstraction has 727 states and 1258 transitions. [2021-08-06 20:11:56,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:56,688 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 1258 transitions. [2021-08-06 20:11:56,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 20:11:56,689 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:56,689 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:56,767 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 20:11:56,905 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,SelfDestructingSolverStorable77 [2021-08-06 20:11:56,905 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:11:56,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:56,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1557349107, now seen corresponding path program 77 times [2021-08-06 20:11:56,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:56,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050276090] [2021-08-06 20:11:56,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:56,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:56,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:11:57,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:57,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050276090] [2021-08-06 20:11:57,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050276090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:57,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96522726] [2021-08-06 20:11:57,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:11:57,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:57,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:57,414 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 20:11:57,436 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 20:12:01,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 20:12:01,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:12:01,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 20:12:01,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:01,620 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:12:01,621 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:12:01,657 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:12:01,658 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:12:01,672 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:12:01,674 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:12:01,688 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:12:01,689 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:12:01,703 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:12:01,704 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:12:01,718 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:12:01,719 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:12:01,744 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 20:12:01,745 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 20:12:01,750 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:12:01,750 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:12:01,767 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:12:01,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96522726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:01,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:01,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-06 20:12:01,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360620218] [2021-08-06 20:12:01,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:12:01,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:01,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:12:01,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:12:01,768 INFO L87 Difference]: Start difference. First operand 727 states and 1258 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:01,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:12:01,922 INFO L93 Difference]: Finished difference Result 917 states and 1569 transitions. [2021-08-06 20:12:01,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:12:01,922 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 20:12:01,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:12:01,924 INFO L225 Difference]: With dead ends: 917 [2021-08-06 20:12:01,924 INFO L226 Difference]: Without dead ends: 871 [2021-08-06 20:12:01,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 225.3ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:12:01,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-08-06 20:12:01,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 780. [2021-08-06 20:12:01,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 1.7098844672657252) internal successors, (1332), 779 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:01,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1332 transitions. [2021-08-06 20:12:01,930 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1332 transitions. Word has length 41 [2021-08-06 20:12:01,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:12:01,930 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 1332 transitions. [2021-08-06 20:12:01,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:01,930 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1332 transitions. [2021-08-06 20:12:01,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 20:12:01,931 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:12:01,931 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:12:01,959 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 20:12:02,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:02,132 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:12:02,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:12:02,132 INFO L82 PathProgramCache]: Analyzing trace with hash 658055907, now seen corresponding path program 78 times [2021-08-06 20:12:02,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:12:02,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238940397] [2021-08-06 20:12:02,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:12:02,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:12:02,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:02,329 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 33.6 percent of original size [2021-08-06 20:12:02,333 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 33.6 percent of original size [2021-08-06 20:12:02,451 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 56.9 percent of original size [2021-08-06 20:12:02,453 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 56.9 percent of original size [2021-08-06 20:12:02,484 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 46.8 percent of original size [2021-08-06 20:12:02,485 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 46.8 percent of original size [2021-08-06 20:12:02,512 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 50.0 percent of original size [2021-08-06 20:12:02,514 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 50.0 percent of original size [2021-08-06 20:12:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:12:02,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:12:02,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238940397] [2021-08-06 20:12:02,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238940397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:02,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17687054] [2021-08-06 20:12:02,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:12:02,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:02,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:12:02,559 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 20:12:02,560 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 20:12:06,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 20:12:06,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:12:06,539 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-06 20:12:06,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:06,910 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:12:06,912 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:12:07,025 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:12:07,027 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:12:07,114 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:12:07,116 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:12:07,172 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:12:07,175 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:12:07,231 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:12:07,234 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:12:07,323 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 48.1 percent of original size [2021-08-06 20:12:07,326 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 48.1 percent of original size [2021-08-06 20:12:07,719 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:12:07,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17687054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:07,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:07,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-08-06 20:12:07,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281847236] [2021-08-06 20:12:07,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-06 20:12:07,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:07,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-06 20:12:07,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1421, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 20:12:07,720 INFO L87 Difference]: Start difference. First operand 780 states and 1332 transitions. Second operand has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:09,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:12:09,682 INFO L93 Difference]: Finished difference Result 909 states and 1507 transitions. [2021-08-06 20:12:09,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-06 20:12:09,682 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 20:12:09,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:12:09,683 INFO L225 Difference]: With dead ends: 909 [2021-08-06 20:12:09,683 INFO L226 Difference]: Without dead ends: 889 [2021-08-06 20:12:09,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2158 ImplicationChecksByTransitivity, 1992.5ms TimeCoverageRelationStatistics Valid=527, Invalid=6783, Unknown=0, NotChecked=0, Total=7310 [2021-08-06 20:12:09,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2021-08-06 20:12:09,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 698. [2021-08-06 20:12:09,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 1.708751793400287) internal successors, (1191), 697 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:09,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1191 transitions. [2021-08-06 20:12:09,690 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1191 transitions. Word has length 41 [2021-08-06 20:12:09,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:12:09,690 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 1191 transitions. [2021-08-06 20:12:09,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:09,690 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1191 transitions. [2021-08-06 20:12:09,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 20:12:09,691 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:12:09,691 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:12:09,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-06 20:12:09,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:09,891 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:12:09,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:12:09,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1891616093, now seen corresponding path program 79 times [2021-08-06 20:12:09,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:12:09,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820822341] [2021-08-06 20:12:09,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:12:09,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:12:09,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:10,095 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 33.6 percent of original size [2021-08-06 20:12:10,099 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 33.6 percent of original size [2021-08-06 20:12:10,214 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 56.9 percent of original size [2021-08-06 20:12:10,216 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 56.9 percent of original size [2021-08-06 20:12:10,246 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 55.1 percent of original size [2021-08-06 20:12:10,248 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 55.1 percent of original size [2021-08-06 20:12:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:12:10,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:12:10,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820822341] [2021-08-06 20:12:10,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820822341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:10,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905904770] [2021-08-06 20:12:10,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:12:10,334 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:10,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:12:10,334 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 20:12:10,335 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 20:12:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:14,415 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-06 20:12:14,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:14,752 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:12:14,754 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:12:14,882 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:12:14,884 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:12:14,939 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:12:14,941 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:12:14,996 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:12:14,999 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:12:15,057 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:12:15,060 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:12:15,147 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 48.1 percent of original size [2021-08-06 20:12:15,150 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 48.1 percent of original size [2021-08-06 20:12:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:12:15,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905904770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:15,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:15,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 38 [2021-08-06 20:12:15,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51124564] [2021-08-06 20:12:15,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-06 20:12:15,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:15,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-06 20:12:15,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:12:15,592 INFO L87 Difference]: Start difference. First operand 698 states and 1191 transitions. Second operand has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:17,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:12:17,779 INFO L93 Difference]: Finished difference Result 903 states and 1519 transitions. [2021-08-06 20:12:17,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-08-06 20:12:17,779 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 20:12:17,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:12:17,781 INFO L225 Difference]: With dead ends: 903 [2021-08-06 20:12:17,781 INFO L226 Difference]: Without dead ends: 891 [2021-08-06 20:12:17,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2469 ImplicationChecksByTransitivity, 2135.0ms TimeCoverageRelationStatistics Valid=673, Invalid=7517, Unknown=0, NotChecked=0, Total=8190 [2021-08-06 20:12:17,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-08-06 20:12:17,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 713. [2021-08-06 20:12:17,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 1.7078651685393258) internal successors, (1216), 712 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:17,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1216 transitions. [2021-08-06 20:12:17,788 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1216 transitions. Word has length 41 [2021-08-06 20:12:17,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:12:17,788 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 1216 transitions. [2021-08-06 20:12:17,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:17,788 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1216 transitions. [2021-08-06 20:12:17,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 20:12:17,788 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:12:17,789 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:12:17,823 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 20:12:18,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:18,009 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:12:18,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:12:18,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1922574763, now seen corresponding path program 80 times [2021-08-06 20:12:18,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:12:18,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96613653] [2021-08-06 20:12:18,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:12:18,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:12:18,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:18,219 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 120, result has 21.6 percent of original size [2021-08-06 20:12:18,223 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 120, result has 21.6 percent of original size [2021-08-06 20:12:18,246 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 39, result has 40.9 percent of original size [2021-08-06 20:12:18,248 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 39, result has 40.9 percent of original size [2021-08-06 20:12:18,269 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 36, result has 42.9 percent of original size [2021-08-06 20:12:18,271 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 36, result has 42.9 percent of original size [2021-08-06 20:12:18,279 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 35, result has 42.6 percent of original size [2021-08-06 20:12:18,281 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 35, result has 42.6 percent of original size [2021-08-06 20:12:18,302 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 36, result has 42.9 percent of original size [2021-08-06 20:12:18,304 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 36, result has 42.9 percent of original size [2021-08-06 20:12:18,326 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 33, result has 42.1 percent of original size [2021-08-06 20:12:18,328 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 33, result has 42.1 percent of original size [2021-08-06 20:12:18,395 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 48, result has 32.4 percent of original size [2021-08-06 20:12:18,397 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 48, result has 32.4 percent of original size [2021-08-06 20:12:18,424 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.9 percent of original size [2021-08-06 20:12:18,427 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.9 percent of original size [2021-08-06 20:12:18,459 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 51.1 percent of original size [2021-08-06 20:12:18,460 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 51.1 percent of original size [2021-08-06 20:12:18,487 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 55.1 percent of original size [2021-08-06 20:12:18,489 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 55.1 percent of original size [2021-08-06 20:12:18,583 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:12:18,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:12:18,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96613653] [2021-08-06 20:12:18,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96613653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:18,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202066728] [2021-08-06 20:12:18,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:12:18,584 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:18,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:12:18,585 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 20:12:18,586 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 20:12:23,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:12:23,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:12:23,513 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 59 conjunts are in the unsatisfiable core [2021-08-06 20:12:23,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:23,813 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:12:23,815 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:12:23,899 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:12:23,901 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:12:23,943 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:12:23,945 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:12:23,987 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 41.7 percent of original size [2021-08-06 20:12:23,989 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 41.7 percent of original size [2021-08-06 20:12:24,132 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:12:24,135 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:12:24,189 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:12:24,191 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:12:24,660 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:12:24,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202066728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:24,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:24,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 36 [2021-08-06 20:12:24,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242010405] [2021-08-06 20:12:24,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-06 20:12:24,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:24,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-06 20:12:24,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1181, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 20:12:24,661 INFO L87 Difference]: Start difference. First operand 713 states and 1216 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:29,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:12:29,233 INFO L93 Difference]: Finished difference Result 952 states and 1609 transitions. [2021-08-06 20:12:29,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-08-06 20:12:29,234 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 20:12:29,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:12:29,235 INFO L225 Difference]: With dead ends: 952 [2021-08-06 20:12:29,235 INFO L226 Difference]: Without dead ends: 940 [2021-08-06 20:12:29,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2588 ImplicationChecksByTransitivity, 4129.1ms TimeCoverageRelationStatistics Valid=936, Invalid=7620, Unknown=0, NotChecked=0, Total=8556 [2021-08-06 20:12:29,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-08-06 20:12:29,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 716. [2021-08-06 20:12:29,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.7076923076923076) internal successors, (1221), 715 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:29,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1221 transitions. [2021-08-06 20:12:29,242 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1221 transitions. Word has length 41 [2021-08-06 20:12:29,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:12:29,242 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 1221 transitions. [2021-08-06 20:12:29,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:29,242 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1221 transitions. [2021-08-06 20:12:29,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 20:12:29,243 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:12:29,243 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:12:29,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-06 20:12:29,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:29,473 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:12:29,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:12:29,473 INFO L82 PathProgramCache]: Analyzing trace with hash -4711185, now seen corresponding path program 81 times [2021-08-06 20:12:29,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:12:29,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936408237] [2021-08-06 20:12:29,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:12:29,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:12:29,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:30,059 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 33.1 percent of original size [2021-08-06 20:12:30,063 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 33.1 percent of original size [2021-08-06 20:12:30,117 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 83.9 percent of original size [2021-08-06 20:12:30,119 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 83.9 percent of original size [2021-08-06 20:12:30,143 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 20:12:30,144 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 20:12:30,169 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.3 percent of original size [2021-08-06 20:12:30,170 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.3 percent of original size [2021-08-06 20:12:30,194 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.3 percent of original size [2021-08-06 20:12:30,196 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.3 percent of original size [2021-08-06 20:12:30,220 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 89.3 percent of original size [2021-08-06 20:12:30,280 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 89.3 percent of original size [2021-08-06 20:12:30,318 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 89.3 percent of original size [2021-08-06 20:12:30,320 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 89.3 percent of original size [2021-08-06 20:12:30,406 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 60.0 percent of original size [2021-08-06 20:12:30,408 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 60.0 percent of original size [2021-08-06 20:12:30,438 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 57.9 percent of original size [2021-08-06 20:12:30,439 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 57.9 percent of original size [2021-08-06 20:12:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:12:30,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:12:30,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936408237] [2021-08-06 20:12:30,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936408237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:30,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958590131] [2021-08-06 20:12:30,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:12:30,570 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:30,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:12:30,571 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 20:12:30,572 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 20:12:34,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 20:12:34,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:12:34,817 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-06 20:12:34,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:35,060 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:12:35,063 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:12:35,106 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:12:35,108 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:12:35,154 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 41.7 percent of original size [2021-08-06 20:12:35,156 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 41.7 percent of original size [2021-08-06 20:12:36,472 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:12:36,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958590131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:36,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:36,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 39 [2021-08-06 20:12:36,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68027470] [2021-08-06 20:12:36,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-06 20:12:36,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:36,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-06 20:12:36,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1429, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 20:12:36,473 INFO L87 Difference]: Start difference. First operand 716 states and 1221 transitions. Second operand has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:45,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:12:45,432 INFO L93 Difference]: Finished difference Result 1295 states and 2140 transitions. [2021-08-06 20:12:45,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-08-06 20:12:45,432 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 20:12:45,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:12:45,434 INFO L225 Difference]: With dead ends: 1295 [2021-08-06 20:12:45,434 INFO L226 Difference]: Without dead ends: 1277 [2021-08-06 20:12:45,435 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8670 ImplicationChecksByTransitivity, 8299.4ms TimeCoverageRelationStatistics Valid=2597, Invalid=21895, Unknown=0, NotChecked=0, Total=24492 [2021-08-06 20:12:45,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-08-06 20:12:45,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 795. [2021-08-06 20:12:45,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 1.7191435768261965) internal successors, (1365), 794 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:45,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1365 transitions. [2021-08-06 20:12:45,457 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1365 transitions. Word has length 41 [2021-08-06 20:12:45,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:12:45,457 INFO L470 AbstractCegarLoop]: Abstraction has 795 states and 1365 transitions. [2021-08-06 20:12:45,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:45,457 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1365 transitions. [2021-08-06 20:12:45,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 20:12:45,458 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:12:45,458 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:12:45,556 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 20:12:45,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:45,689 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:12:45,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:12:45,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1788597423, now seen corresponding path program 82 times [2021-08-06 20:12:45,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:12:45,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987034241] [2021-08-06 20:12:45,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:12:45,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:12:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:45,949 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 33.1 percent of original size [2021-08-06 20:12:45,952 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 33.1 percent of original size [2021-08-06 20:12:45,976 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 20:12:45,978 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 20:12:45,997 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 20:12:45,998 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 20:12:46,017 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 20:12:46,019 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 20:12:46,027 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 77.1 percent of original size [2021-08-06 20:12:46,028 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 77.1 percent of original size [2021-08-06 20:12:46,036 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 81.3 percent of original size [2021-08-06 20:12:46,037 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 81.3 percent of original size [2021-08-06 20:12:46,045 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 81.8 percent of original size [2021-08-06 20:12:46,047 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 81.8 percent of original size [2021-08-06 20:12:46,067 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 81.8 percent of original size [2021-08-06 20:12:46,068 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 81.8 percent of original size [2021-08-06 20:12:46,090 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 80.0 percent of original size [2021-08-06 20:12:46,091 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 80.0 percent of original size [2021-08-06 20:12:46,113 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 80.0 percent of original size [2021-08-06 20:12:46,115 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 80.0 percent of original size [2021-08-06 20:12:46,138 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 88.5 percent of original size [2021-08-06 20:12:46,140 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 88.5 percent of original size [2021-08-06 20:12:46,191 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 51.1 percent of original size [2021-08-06 20:12:46,193 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 51.1 percent of original size [2021-08-06 20:12:46,219 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 55.1 percent of original size [2021-08-06 20:12:46,221 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 55.1 percent of original size [2021-08-06 20:12:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:12:46,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:12:46,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987034241] [2021-08-06 20:12:46,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987034241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:46,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474540888] [2021-08-06 20:12:46,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:12:46,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:46,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:12:46,364 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 20:12:46,365 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 20:12:51,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:12:51,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:12:51,528 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 61 conjunts are in the unsatisfiable core [2021-08-06 20:12:51,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:51,733 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:12:51,735 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:12:51,845 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:12:51,848 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:12:52,342 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 41.7 percent of original size [2021-08-06 20:12:52,344 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 41.7 percent of original size [2021-08-06 20:12:53,061 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:12:53,064 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:12:53,130 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:12:53,132 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:12:53,187 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:12:53,189 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:12:53,306 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:12:53,309 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:12:53,528 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:12:53,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474540888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:53,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:53,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 36 [2021-08-06 20:12:53,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932788422] [2021-08-06 20:12:53,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-06 20:12:53,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:53,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-06 20:12:53,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 20:12:53,545 INFO L87 Difference]: Start difference. First operand 795 states and 1365 transitions. Second operand has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:57,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:12:57,243 INFO L93 Difference]: Finished difference Result 1055 states and 1776 transitions. [2021-08-06 20:12:57,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-08-06 20:12:57,244 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 20:12:57,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:12:57,245 INFO L225 Difference]: With dead ends: 1055 [2021-08-06 20:12:57,245 INFO L226 Difference]: Without dead ends: 1043 [2021-08-06 20:12:57,245 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4267 ImplicationChecksByTransitivity, 4140.8ms TimeCoverageRelationStatistics Valid=1211, Invalid=11445, Unknown=0, NotChecked=0, Total=12656 [2021-08-06 20:12:57,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2021-08-06 20:12:57,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 801. [2021-08-06 20:12:57,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 1.72) internal successors, (1376), 800 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:57,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1376 transitions. [2021-08-06 20:12:57,252 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1376 transitions. Word has length 41 [2021-08-06 20:12:57,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:12:57,252 INFO L470 AbstractCegarLoop]: Abstraction has 801 states and 1376 transitions. [2021-08-06 20:12:57,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:57,252 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1376 transitions. [2021-08-06 20:12:57,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:12:57,253 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:12:57,253 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:12:57,282 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 20:12:57,453 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,SelfDestructingSolverStorable83 [2021-08-06 20:12:57,454 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:12:57,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:12:57,454 INFO L82 PathProgramCache]: Analyzing trace with hash -197845263, now seen corresponding path program 83 times [2021-08-06 20:12:57,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:12:57,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642640578] [2021-08-06 20:12:57,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:12:57,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:12:57,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:57,780 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:12:57,784 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:12:57,817 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:12:57,820 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:12:57,889 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:12:57,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:12:57,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642640578] [2021-08-06 20:12:57,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642640578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:57,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227942203] [2021-08-06 20:12:57,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:12:57,890 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:57,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:12:57,890 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 20:12:57,891 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 20:13:02,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 20:13:02,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:13:02,482 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-06 20:13:02,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:13:03,148 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:03,150 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:03,202 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:03,204 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:03,250 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:03,252 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:03,298 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:03,300 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:03,347 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:03,349 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:03,402 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:03,404 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:03,494 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:13:03,497 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:13:03,657 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:03,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227942203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:03,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:13:03,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-06 20:13:03,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895100026] [2021-08-06 20:13:03,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 20:13:03,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:13:03,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 20:13:03,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1601, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:13:03,658 INFO L87 Difference]: Start difference. First operand 801 states and 1376 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:07,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:13:07,671 INFO L93 Difference]: Finished difference Result 1139 states and 1885 transitions. [2021-08-06 20:13:07,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-08-06 20:13:07,671 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:13:07,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:13:07,672 INFO L225 Difference]: With dead ends: 1139 [2021-08-06 20:13:07,672 INFO L226 Difference]: Without dead ends: 1099 [2021-08-06 20:13:07,673 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2936 ImplicationChecksByTransitivity, 3875.9ms TimeCoverageRelationStatistics Valid=1247, Invalid=8853, Unknown=0, NotChecked=0, Total=10100 [2021-08-06 20:13:07,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-08-06 20:13:07,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 952. [2021-08-06 20:13:07,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 951 states have (on average 1.7444794952681388) internal successors, (1659), 951 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:07,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1659 transitions. [2021-08-06 20:13:07,703 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1659 transitions. Word has length 43 [2021-08-06 20:13:07,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:13:07,704 INFO L470 AbstractCegarLoop]: Abstraction has 952 states and 1659 transitions. [2021-08-06 20:13:07,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:07,708 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1659 transitions. [2021-08-06 20:13:07,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:13:07,709 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:13:07,710 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:13:07,766 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 20:13:07,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:07,925 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:13:07,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:13:07,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1918073103, now seen corresponding path program 84 times [2021-08-06 20:13:07,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:13:07,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145943522] [2021-08-06 20:13:07,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:13:07,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:13:07,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:13:08,526 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:13:08,530 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:13:08,564 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:13:08,567 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:13:08,642 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:08,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:13:08,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145943522] [2021-08-06 20:13:08,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145943522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:08,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040284641] [2021-08-06 20:13:08,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:13:08,642 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:08,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:13:08,645 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 20:13:08,645 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 20:13:13,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 20:13:13,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:13:13,699 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 61 conjunts are in the unsatisfiable core [2021-08-06 20:13:13,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:13:14,221 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:14,223 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:14,318 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:14,330 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:14,390 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:14,392 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:15,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040284641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:15,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:13:15,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-06 20:13:15,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352593705] [2021-08-06 20:13:15,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 20:13:15,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:13:15,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 20:13:15,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:13:15,196 INFO L87 Difference]: Start difference. First operand 952 states and 1659 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:17,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:13:17,891 INFO L93 Difference]: Finished difference Result 1165 states and 1919 transitions. [2021-08-06 20:13:17,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-08-06 20:13:17,891 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:13:17,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:13:17,893 INFO L225 Difference]: With dead ends: 1165 [2021-08-06 20:13:17,893 INFO L226 Difference]: Without dead ends: 1129 [2021-08-06 20:13:17,894 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3114 ImplicationChecksByTransitivity, 2895.6ms TimeCoverageRelationStatistics Valid=1320, Invalid=9810, Unknown=0, NotChecked=0, Total=11130 [2021-08-06 20:13:17,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2021-08-06 20:13:17,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 954. [2021-08-06 20:13:17,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 1.7439664218258133) internal successors, (1662), 953 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:17,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1662 transitions. [2021-08-06 20:13:17,903 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1662 transitions. Word has length 43 [2021-08-06 20:13:17,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:13:17,903 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 1662 transitions. [2021-08-06 20:13:17,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:17,903 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1662 transitions. [2021-08-06 20:13:17,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:13:17,904 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:13:17,904 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:13:17,933 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 20:13:18,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:18,105 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:13:18,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:13:18,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1843261169, now seen corresponding path program 85 times [2021-08-06 20:13:18,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:13:18,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910779195] [2021-08-06 20:13:18,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:13:18,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:13:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:13:18,402 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:13:18,406 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:13:18,437 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:13:18,440 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:13:18,501 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:18,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:13:18,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910779195] [2021-08-06 20:13:18,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910779195] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:18,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079090364] [2021-08-06 20:13:18,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:13:18,501 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:18,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:13:18,502 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 20:13:18,503 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 20:13:23,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:13:23,542 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-06 20:13:23,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:13:24,509 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:24,511 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:24,557 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:24,559 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:24,654 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:24,656 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:24,704 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:24,706 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:24,753 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:24,755 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:24,804 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:24,806 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:24,952 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:13:24,955 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:13:25,114 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:25,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079090364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:25,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:13:25,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-06 20:13:25,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837000326] [2021-08-06 20:13:25,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 20:13:25,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:13:25,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 20:13:25,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1613, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:13:25,116 INFO L87 Difference]: Start difference. First operand 954 states and 1662 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:30,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:13:30,018 INFO L93 Difference]: Finished difference Result 1163 states and 1918 transitions. [2021-08-06 20:13:30,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-08-06 20:13:30,018 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:13:30,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:13:30,019 INFO L225 Difference]: With dead ends: 1163 [2021-08-06 20:13:30,020 INFO L226 Difference]: Without dead ends: 1131 [2021-08-06 20:13:30,021 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3662 ImplicationChecksByTransitivity, 5001.3ms TimeCoverageRelationStatistics Valid=1431, Invalid=10779, Unknown=0, NotChecked=0, Total=12210 [2021-08-06 20:13:30,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-08-06 20:13:30,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 956. [2021-08-06 20:13:30,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 1.743455497382199) internal successors, (1665), 955 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:30,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1665 transitions. [2021-08-06 20:13:30,030 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1665 transitions. Word has length 43 [2021-08-06 20:13:30,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:13:30,030 INFO L470 AbstractCegarLoop]: Abstraction has 956 states and 1665 transitions. [2021-08-06 20:13:30,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:30,030 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1665 transitions. [2021-08-06 20:13:30,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:13:30,031 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:13:30,031 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:13:30,069 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 20:13:30,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:30,245 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:13:30,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:13:30,245 INFO L82 PathProgramCache]: Analyzing trace with hash -79079695, now seen corresponding path program 86 times [2021-08-06 20:13:30,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:13:30,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100229153] [2021-08-06 20:13:30,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:13:30,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:13:30,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:13:30,665 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:13:30,669 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:13:30,703 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:13:30,706 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:13:30,774 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:30,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:13:30,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100229153] [2021-08-06 20:13:30,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100229153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:30,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239578660] [2021-08-06 20:13:30,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:13:30,774 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:30,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:13:30,775 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 20:13:30,776 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 20:13:35,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:13:35,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:13:35,714 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-06 20:13:35,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:13:36,370 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:36,373 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:36,427 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:36,430 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:36,480 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:36,482 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:36,576 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:36,578 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:36,626 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:36,628 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:36,677 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:36,679 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:36,757 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:13:36,759 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:13:37,024 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:37,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239578660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:37,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:13:37,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-06 20:13:37,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032206682] [2021-08-06 20:13:37,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 20:13:37,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:13:37,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 20:13:37,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1613, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:13:37,025 INFO L87 Difference]: Start difference. First operand 956 states and 1665 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:41,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:13:41,663 INFO L93 Difference]: Finished difference Result 1161 states and 1917 transitions. [2021-08-06 20:13:41,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-08-06 20:13:41,664 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:13:41,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:13:41,665 INFO L225 Difference]: With dead ends: 1161 [2021-08-06 20:13:41,665 INFO L226 Difference]: Without dead ends: 1133 [2021-08-06 20:13:41,666 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4039 ImplicationChecksByTransitivity, 4352.7ms TimeCoverageRelationStatistics Valid=1555, Invalid=11785, Unknown=0, NotChecked=0, Total=13340 [2021-08-06 20:13:41,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2021-08-06 20:13:41,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 958. [2021-08-06 20:13:41,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 1.7429467084639498) internal successors, (1668), 957 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:41,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 1668 transitions. [2021-08-06 20:13:41,706 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 1668 transitions. Word has length 43 [2021-08-06 20:13:41,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:13:41,707 INFO L470 AbstractCegarLoop]: Abstraction has 958 states and 1668 transitions. [2021-08-06 20:13:41,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:41,707 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 1668 transitions. [2021-08-06 20:13:41,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:13:41,708 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:13:41,708 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:13:41,795 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 20:13:41,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:41,941 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:13:41,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:13:41,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1013890801, now seen corresponding path program 87 times [2021-08-06 20:13:41,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:13:41,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358603166] [2021-08-06 20:13:41,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:13:41,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:13:41,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:13:42,407 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:13:42,410 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:13:42,443 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:13:42,446 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:13:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:42,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:13:42,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358603166] [2021-08-06 20:13:42,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358603166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:42,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802796360] [2021-08-06 20:13:42,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:13:42,522 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:42,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:13:42,523 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 20:13:42,524 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 20:13:48,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 20:13:48,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:13:48,428 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-06 20:13:48,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:13:49,025 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:49,027 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:49,073 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:49,075 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:49,145 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:49,148 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:49,196 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:49,198 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:49,297 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:49,299 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:49,349 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:49,351 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:13:49,715 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:13:49,717 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:13:49,878 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:49,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802796360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:49,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:13:49,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-06 20:13:49,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601643790] [2021-08-06 20:13:49,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 20:13:49,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:13:49,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 20:13:49,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1609, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:13:49,879 INFO L87 Difference]: Start difference. First operand 958 states and 1668 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:53,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:13:53,825 INFO L93 Difference]: Finished difference Result 1159 states and 1916 transitions. [2021-08-06 20:13:53,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-08-06 20:13:53,825 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:13:53,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:13:53,827 INFO L225 Difference]: With dead ends: 1159 [2021-08-06 20:13:53,827 INFO L226 Difference]: Without dead ends: 1135 [2021-08-06 20:13:53,829 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4432 ImplicationChecksByTransitivity, 3968.4ms TimeCoverageRelationStatistics Valid=1704, Invalid=12816, Unknown=0, NotChecked=0, Total=14520 [2021-08-06 20:13:53,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2021-08-06 20:13:53,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 960. [2021-08-06 20:13:53,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 1.7424400417101147) internal successors, (1671), 959 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:53,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1671 transitions. [2021-08-06 20:13:53,851 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1671 transitions. Word has length 43 [2021-08-06 20:13:53,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:13:53,851 INFO L470 AbstractCegarLoop]: Abstraction has 960 states and 1671 transitions. [2021-08-06 20:13:53,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:53,851 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1671 transitions. [2021-08-06 20:13:53,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:13:53,852 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:13:53,856 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:13:53,912 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 20:13:54,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:54,089 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:13:54,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:13:54,089 INFO L82 PathProgramCache]: Analyzing trace with hash -674355471, now seen corresponding path program 88 times [2021-08-06 20:13:54,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:13:54,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163712707] [2021-08-06 20:13:54,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:13:54,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:13:54,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:13:54,685 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:13:54,689 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:13:54,722 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:13:54,725 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:13:54,793 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:54,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:13:54,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163712707] [2021-08-06 20:13:54,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163712707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:54,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323381562] [2021-08-06 20:13:54,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:13:54,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:54,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:13:54,797 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 20:13:54,804 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 20:13:59,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:13:59,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:13:59,908 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-06 20:13:59,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:14:00,901 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:00,903 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:00,950 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:00,952 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:01,000 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:01,002 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:01,050 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:01,052 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:01,101 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:01,103 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:01,696 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:01,698 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:01,793 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:14:01,795 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:14:01,980 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:01,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323381562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:01,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:14:01,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-06 20:14:01,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284074701] [2021-08-06 20:14:01,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 20:14:01,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:14:01,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 20:14:01,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1601, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:14:01,981 INFO L87 Difference]: Start difference. First operand 960 states and 1671 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:05,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:14:05,868 INFO L93 Difference]: Finished difference Result 1158 states and 1916 transitions. [2021-08-06 20:14:05,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-08-06 20:14:05,868 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:14:05,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:14:05,869 INFO L225 Difference]: With dead ends: 1158 [2021-08-06 20:14:05,870 INFO L226 Difference]: Without dead ends: 1138 [2021-08-06 20:14:05,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4841 ImplicationChecksByTransitivity, 4313.8ms TimeCoverageRelationStatistics Valid=1878, Invalid=13872, Unknown=0, NotChecked=0, Total=15750 [2021-08-06 20:14:05,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-08-06 20:14:05,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 962. [2021-08-06 20:14:05,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 961 states have (on average 1.7419354838709677) internal successors, (1674), 961 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:05,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 1674 transitions. [2021-08-06 20:14:05,879 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 1674 transitions. Word has length 43 [2021-08-06 20:14:05,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:14:05,880 INFO L470 AbstractCegarLoop]: Abstraction has 962 states and 1674 transitions. [2021-08-06 20:14:05,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:05,880 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 1674 transitions. [2021-08-06 20:14:05,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:14:05,881 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:14:05,881 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:14:05,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-06 20:14:06,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-08-06 20:14:06,101 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:14:06,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:14:06,102 INFO L82 PathProgramCache]: Analyzing trace with hash 333942513, now seen corresponding path program 89 times [2021-08-06 20:14:06,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:14:06,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681767567] [2021-08-06 20:14:06,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:14:06,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:14:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:14:06,411 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:14:06,414 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:14:06,449 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:14:06,452 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:14:06,483 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:14:06,486 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:14:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:06,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:14:06,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681767567] [2021-08-06 20:14:06,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681767567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:06,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438941533] [2021-08-06 20:14:06,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:14:06,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:14:06,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:14:06,552 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 20:14:06,568 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 20:14:11,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 20:14:11,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:14:11,923 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-06 20:14:11,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:14:12,434 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:12,437 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:12,484 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:12,486 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:12,531 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:12,533 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:12,580 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:12,582 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:12,629 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:12,631 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:12,679 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:12,682 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:12,826 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:14:12,828 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:14:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:12,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438941533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:12,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:14:12,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-06 20:14:12,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951633072] [2021-08-06 20:14:12,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 20:14:12,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:14:12,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 20:14:12,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1587, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:14:12,986 INFO L87 Difference]: Start difference. First operand 962 states and 1674 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:16,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:14:16,792 INFO L93 Difference]: Finished difference Result 1201 states and 1977 transitions. [2021-08-06 20:14:16,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-08-06 20:14:16,792 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:14:16,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:14:16,793 INFO L225 Difference]: With dead ends: 1201 [2021-08-06 20:14:16,793 INFO L226 Difference]: Without dead ends: 1177 [2021-08-06 20:14:16,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4832 ImplicationChecksByTransitivity, 3584.8ms TimeCoverageRelationStatistics Valid=1885, Invalid=13865, Unknown=0, NotChecked=0, Total=15750 [2021-08-06 20:14:16,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-08-06 20:14:16,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 970. [2021-08-06 20:14:16,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 969 states have (on average 1.7420020639834881) internal successors, (1688), 969 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:16,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1688 transitions. [2021-08-06 20:14:16,803 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1688 transitions. Word has length 43 [2021-08-06 20:14:16,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:14:16,803 INFO L470 AbstractCegarLoop]: Abstraction has 970 states and 1688 transitions. [2021-08-06 20:14:16,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:16,803 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1688 transitions. [2021-08-06 20:14:16,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:14:16,804 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:14:16,804 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:14:16,834 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 20:14:17,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:14:17,004 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:14:17,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:14:17,005 INFO L82 PathProgramCache]: Analyzing trace with hash -684001551, now seen corresponding path program 90 times [2021-08-06 20:14:17,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:14:17,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185845706] [2021-08-06 20:14:17,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:14:17,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:14:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:14:17,265 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:14:17,269 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:14:17,301 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 27.7 percent of original size [2021-08-06 20:14:17,304 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 27.7 percent of original size [2021-08-06 20:14:17,390 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:17,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:14:17,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185845706] [2021-08-06 20:14:17,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185845706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:17,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054755171] [2021-08-06 20:14:17,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:14:17,390 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:14:17,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:14:17,392 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 20:14:17,393 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 20:14:22,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 20:14:22,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:14:22,250 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-06 20:14:22,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:14:22,784 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:22,786 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:22,831 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:22,833 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:22,878 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:22,880 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:22,926 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:22,928 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:22,976 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:22,978 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:23,027 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:23,029 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:23,110 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:14:23,112 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:14:23,334 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:23,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054755171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:23,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:14:23,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-06 20:14:23,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974749712] [2021-08-06 20:14:23,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 20:14:23,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:14:23,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 20:14:23,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1583, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:14:23,335 INFO L87 Difference]: Start difference. First operand 970 states and 1688 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:27,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:14:27,833 INFO L93 Difference]: Finished difference Result 1175 states and 1957 transitions. [2021-08-06 20:14:27,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-08-06 20:14:27,834 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:14:27,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:14:27,835 INFO L225 Difference]: With dead ends: 1175 [2021-08-06 20:14:27,835 INFO L226 Difference]: Without dead ends: 1165 [2021-08-06 20:14:27,836 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4319 ImplicationChecksByTransitivity, 3111.5ms TimeCoverageRelationStatistics Valid=1914, Invalid=12366, Unknown=0, NotChecked=0, Total=14280 [2021-08-06 20:14:27,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-08-06 20:14:27,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 970. [2021-08-06 20:14:27,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 969 states have (on average 1.7420020639834881) internal successors, (1688), 969 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:27,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1688 transitions. [2021-08-06 20:14:27,847 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1688 transitions. Word has length 43 [2021-08-06 20:14:27,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:14:27,847 INFO L470 AbstractCegarLoop]: Abstraction has 970 states and 1688 transitions. [2021-08-06 20:14:27,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:27,848 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1688 transitions. [2021-08-06 20:14:27,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:14:27,849 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:14:27,849 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:14:27,885 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 20:14:28,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:14:28,069 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:14:28,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:14:28,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1459183763, now seen corresponding path program 91 times [2021-08-06 20:14:28,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:14:28,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697679998] [2021-08-06 20:14:28,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:14:28,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:14:28,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:14:28,415 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:14:28,419 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:14:28,454 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:14:28,457 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:14:28,524 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:28,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:14:28,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697679998] [2021-08-06 20:14:28,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697679998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:28,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499795876] [2021-08-06 20:14:28,524 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:14:28,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:14:28,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:14:28,525 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 20:14:28,561 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 20:14:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:14:33,813 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-06 20:14:33,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:14:34,273 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:14:34,275 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:14:34,336 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:14:34,338 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:14:34,722 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:34,725 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:34,782 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:34,784 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:34,840 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:34,842 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:34,905 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:34,908 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:34,987 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:14:34,989 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:14:35,131 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:35,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499795876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:35,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:14:35,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-06 20:14:35,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134547402] [2021-08-06 20:14:35,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 20:14:35,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:14:35,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 20:14:35,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1602, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:14:35,141 INFO L87 Difference]: Start difference. First operand 970 states and 1688 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:38,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:14:38,554 INFO L93 Difference]: Finished difference Result 1169 states and 1930 transitions. [2021-08-06 20:14:38,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-08-06 20:14:38,555 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:14:38,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:14:38,556 INFO L225 Difference]: With dead ends: 1169 [2021-08-06 20:14:38,556 INFO L226 Difference]: Without dead ends: 1137 [2021-08-06 20:14:38,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3337 ImplicationChecksByTransitivity, 3446.2ms TimeCoverageRelationStatistics Valid=1253, Invalid=9877, Unknown=0, NotChecked=0, Total=11130 [2021-08-06 20:14:38,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-08-06 20:14:38,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 974. [2021-08-06 20:14:38,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 1.7420349434737923) internal successors, (1695), 973 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:38,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1695 transitions. [2021-08-06 20:14:38,565 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1695 transitions. Word has length 43 [2021-08-06 20:14:38,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:14:38,565 INFO L470 AbstractCegarLoop]: Abstraction has 974 states and 1695 transitions. [2021-08-06 20:14:38,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:38,565 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1695 transitions. [2021-08-06 20:14:38,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:14:38,566 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:14:38,566 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:14:38,620 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 20:14:38,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:14:38,781 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:14:38,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:14:38,781 INFO L82 PathProgramCache]: Analyzing trace with hash 913442669, now seen corresponding path program 92 times [2021-08-06 20:14:38,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:14:38,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668226166] [2021-08-06 20:14:38,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:14:38,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:14:38,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:14:39,109 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:14:39,113 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:14:39,145 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:14:39,149 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:14:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:39,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:14:39,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668226166] [2021-08-06 20:14:39,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668226166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:39,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901023462] [2021-08-06 20:14:39,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:14:39,216 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:14:39,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:14:39,216 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 20:14:39,248 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 20:14:44,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:14:44,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:14:44,462 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-06 20:14:44,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:14:44,947 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:14:44,949 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:14:45,007 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:14:45,012 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:14:45,103 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:45,105 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:45,335 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:45,345 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:45,423 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:45,425 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:45,474 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:45,476 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:45,555 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:14:45,558 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:14:45,699 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:45,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901023462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:45,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:14:45,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-06 20:14:45,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634446467] [2021-08-06 20:14:45,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 20:14:45,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:14:45,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 20:14:45,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1602, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:14:45,700 INFO L87 Difference]: Start difference. First operand 974 states and 1695 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:48,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:14:48,464 INFO L93 Difference]: Finished difference Result 1196 states and 1980 transitions. [2021-08-06 20:14:48,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-08-06 20:14:48,464 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:14:48,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:14:48,465 INFO L225 Difference]: With dead ends: 1196 [2021-08-06 20:14:48,465 INFO L226 Difference]: Without dead ends: 1168 [2021-08-06 20:14:48,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3692 ImplicationChecksByTransitivity, 2838.0ms TimeCoverageRelationStatistics Valid=1385, Invalid=10825, Unknown=0, NotChecked=0, Total=12210 [2021-08-06 20:14:48,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-08-06 20:14:48,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 985. [2021-08-06 20:14:48,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 1.7530487804878048) internal successors, (1725), 984 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:48,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1725 transitions. [2021-08-06 20:14:48,476 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1725 transitions. Word has length 43 [2021-08-06 20:14:48,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:14:48,476 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 1725 transitions. [2021-08-06 20:14:48,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:48,476 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1725 transitions. [2021-08-06 20:14:48,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:14:48,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:14:48,477 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:14:48,511 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 20:14:48,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:14:48,697 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:14:48,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:14:48,697 INFO L82 PathProgramCache]: Analyzing trace with hash 2006413165, now seen corresponding path program 93 times [2021-08-06 20:14:48,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:14:48,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071244194] [2021-08-06 20:14:48,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:14:48,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:14:48,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:14:49,004 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:14:49,008 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:14:49,040 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:14:49,043 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:14:49,108 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:49,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:14:49,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071244194] [2021-08-06 20:14:49,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071244194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:49,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862943697] [2021-08-06 20:14:49,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:14:49,109 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:14:49,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:14:49,109 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 20:14:49,110 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 20:14:54,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 20:14:54,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:14:54,660 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-06 20:14:54,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:14:55,141 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:14:55,143 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:14:55,199 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:14:55,201 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:14:55,292 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:55,294 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:55,341 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:55,343 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:55,438 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:55,440 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:55,488 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:55,490 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:14:55,569 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:14:55,571 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:14:55,725 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:55,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862943697] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:55,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:14:55,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-06 20:14:55,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657121763] [2021-08-06 20:14:55,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 20:14:55,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:14:55,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 20:14:55,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1598, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:14:55,726 INFO L87 Difference]: Start difference. First operand 985 states and 1725 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:58,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:14:58,641 INFO L93 Difference]: Finished difference Result 1224 states and 2035 transitions. [2021-08-06 20:14:58,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-08-06 20:14:58,642 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:14:58,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:14:58,643 INFO L225 Difference]: With dead ends: 1224 [2021-08-06 20:14:58,643 INFO L226 Difference]: Without dead ends: 1200 [2021-08-06 20:14:58,644 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4062 ImplicationChecksByTransitivity, 2839.9ms TimeCoverageRelationStatistics Valid=1534, Invalid=11806, Unknown=0, NotChecked=0, Total=13340 [2021-08-06 20:14:58,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-08-06 20:14:58,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1007. [2021-08-06 20:14:58,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 1006 states have (on average 1.757455268389662) internal successors, (1768), 1006 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:58,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 1768 transitions. [2021-08-06 20:14:58,654 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 1768 transitions. Word has length 43 [2021-08-06 20:14:58,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:14:58,654 INFO L470 AbstractCegarLoop]: Abstraction has 1007 states and 1768 transitions. [2021-08-06 20:14:58,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:58,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 1768 transitions. [2021-08-06 20:14:58,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:14:58,655 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:14:58,655 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:14:58,705 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 20:14:58,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:14:58,881 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:14:58,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:14:58,881 INFO L82 PathProgramCache]: Analyzing trace with hash 318166893, now seen corresponding path program 94 times [2021-08-06 20:14:58,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:14:58,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378164310] [2021-08-06 20:14:58,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:14:58,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:14:58,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:14:59,263 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:14:59,267 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:14:59,298 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:14:59,301 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:14:59,366 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:59,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:14:59,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378164310] [2021-08-06 20:14:59,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378164310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:59,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130817036] [2021-08-06 20:14:59,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:14:59,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:14:59,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:14:59,367 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 20:14:59,368 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 20:15:04,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:15:04,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:04,717 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-06 20:15:04,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:05,240 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:05,242 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:05,299 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:05,302 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:05,413 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:15:05,415 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:15:05,480 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:15:05,482 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:15:05,563 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:15:05,566 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:15:05,686 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:15:05,688 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:15:05,771 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:05,774 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:05,983 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:05,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130817036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:05,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:05,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-06 20:15:05,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504978277] [2021-08-06 20:15:05,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 20:15:05,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:05,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 20:15:05,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1590, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:15:05,984 INFO L87 Difference]: Start difference. First operand 1007 states and 1768 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:09,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:09,513 INFO L93 Difference]: Finished difference Result 1248 states and 2082 transitions. [2021-08-06 20:15:09,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-08-06 20:15:09,513 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:15:09,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:09,515 INFO L225 Difference]: With dead ends: 1248 [2021-08-06 20:15:09,515 INFO L226 Difference]: Without dead ends: 1228 [2021-08-06 20:15:09,516 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4447 ImplicationChecksByTransitivity, 3371.9ms TimeCoverageRelationStatistics Valid=1708, Invalid=12812, Unknown=0, NotChecked=0, Total=14520 [2021-08-06 20:15:09,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2021-08-06 20:15:09,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1025. [2021-08-06 20:15:09,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1024 states have (on average 1.7607421875) internal successors, (1803), 1024 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:09,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1803 transitions. [2021-08-06 20:15:09,525 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1803 transitions. Word has length 43 [2021-08-06 20:15:09,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:09,525 INFO L470 AbstractCegarLoop]: Abstraction has 1025 states and 1803 transitions. [2021-08-06 20:15:09,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:09,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1803 transitions. [2021-08-06 20:15:09,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:15:09,526 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:09,526 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:09,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-08-06 20:15:09,727 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,SelfDestructingSolverStorable95 [2021-08-06 20:15:09,727 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:09,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:09,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1326464877, now seen corresponding path program 95 times [2021-08-06 20:15:09,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:09,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761380793] [2021-08-06 20:15:09,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:09,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:09,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:10,032 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:15:10,035 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:15:10,072 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:15:10,076 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:15:10,109 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:15:10,113 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:15:10,183 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:10,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:10,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761380793] [2021-08-06 20:15:10,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761380793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:10,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190642942] [2021-08-06 20:15:10,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:15:10,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:10,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:10,186 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 20:15:10,187 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 20:15:15,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 20:15:15,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:15,473 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-06 20:15:15,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:15,981 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:15,983 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:16,040 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:16,043 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:16,137 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:15:16,140 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:15:16,222 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:15:16,224 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:15:16,295 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:15:16,298 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:15:16,379 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:15:16,382 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:15:16,590 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:16,593 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:16,738 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:16,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190642942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:16,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:16,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-06 20:15:16,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789425512] [2021-08-06 20:15:16,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 20:15:16,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:16,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 20:15:16,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1576, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:15:16,739 INFO L87 Difference]: Start difference. First operand 1025 states and 1803 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:19,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:19,741 INFO L93 Difference]: Finished difference Result 1320 states and 2191 transitions. [2021-08-06 20:15:19,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-08-06 20:15:19,742 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:15:19,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:19,743 INFO L225 Difference]: With dead ends: 1320 [2021-08-06 20:15:19,743 INFO L226 Difference]: Without dead ends: 1294 [2021-08-06 20:15:19,744 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4507 ImplicationChecksByTransitivity, 2956.2ms TimeCoverageRelationStatistics Valid=1770, Invalid=12992, Unknown=0, NotChecked=0, Total=14762 [2021-08-06 20:15:19,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2021-08-06 20:15:19,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 1032. [2021-08-06 20:15:19,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1031 states have (on average 1.7594568380213385) internal successors, (1814), 1031 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:19,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1814 transitions. [2021-08-06 20:15:19,753 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1814 transitions. Word has length 43 [2021-08-06 20:15:19,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:19,753 INFO L470 AbstractCegarLoop]: Abstraction has 1032 states and 1814 transitions. [2021-08-06 20:15:19,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:19,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1814 transitions. [2021-08-06 20:15:19,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:15:19,755 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:19,755 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:19,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-06 20:15:19,955 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,SelfDestructingSolverStorable96 [2021-08-06 20:15:19,955 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:19,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:19,955 INFO L82 PathProgramCache]: Analyzing trace with hash 407050025, now seen corresponding path program 96 times [2021-08-06 20:15:19,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:19,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447014173] [2021-08-06 20:15:19,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:19,956 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:20,247 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:15:20,250 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:15:20,287 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:15:20,291 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:15:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:20,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:20,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447014173] [2021-08-06 20:15:20,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447014173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:20,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62790966] [2021-08-06 20:15:20,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:15:20,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:20,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:20,371 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 20:15:20,371 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 20:15:25,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 20:15:25,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:25,800 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 63 conjunts are in the unsatisfiable core [2021-08-06 20:15:25,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:26,470 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:26,473 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:27,000 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:27,003 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:27,127 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:27,129 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:27,294 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:15:27,296 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:15:27,344 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:15:27,346 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:15:28,265 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:28,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62790966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:28,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:28,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-06 20:15:28,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146341296] [2021-08-06 20:15:28,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 20:15:28,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:28,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 20:15:28,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1603, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:15:28,267 INFO L87 Difference]: Start difference. First operand 1032 states and 1814 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:33,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:33,004 INFO L93 Difference]: Finished difference Result 1212 states and 2031 transitions. [2021-08-06 20:15:33,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-08-06 20:15:33,005 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:15:33,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:33,006 INFO L225 Difference]: With dead ends: 1212 [2021-08-06 20:15:33,006 INFO L226 Difference]: Without dead ends: 1184 [2021-08-06 20:15:33,007 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3704 ImplicationChecksByTransitivity, 5454.8ms TimeCoverageRelationStatistics Valid=1366, Invalid=11066, Unknown=0, NotChecked=0, Total=12432 [2021-08-06 20:15:33,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2021-08-06 20:15:33,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 1035. [2021-08-06 20:15:33,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 1034 states have (on average 1.7591876208897486) internal successors, (1819), 1034 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:33,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 1819 transitions. [2021-08-06 20:15:33,017 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 1819 transitions. Word has length 43 [2021-08-06 20:15:33,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:33,018 INFO L470 AbstractCegarLoop]: Abstraction has 1035 states and 1819 transitions. [2021-08-06 20:15:33,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:33,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 1819 transitions. [2021-08-06 20:15:33,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:15:33,019 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:33,019 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:33,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-08-06 20:15:33,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:33,225 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:33,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:33,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1500020521, now seen corresponding path program 97 times [2021-08-06 20:15:33,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:33,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642383365] [2021-08-06 20:15:33,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:33,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:33,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:33,768 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:15:33,772 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:15:33,874 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:15:33,877 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:15:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:33,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:33,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642383365] [2021-08-06 20:15:33,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642383365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:33,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033986331] [2021-08-06 20:15:33,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:15:33,958 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:33,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:33,965 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 20:15:33,987 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 20:15:40,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:40,458 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-06 20:15:40,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:40,925 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:40,928 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:40,984 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:40,986 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:41,042 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:41,045 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:41,138 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:15:41,140 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:15:41,236 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:15:41,238 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:15:41,286 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:15:41,288 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:15:41,445 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:41,447 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:41,619 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:41,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033986331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:41,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:41,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-06 20:15:41,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21206956] [2021-08-06 20:15:41,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 20:15:41,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:41,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 20:15:41,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1594, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:15:41,621 INFO L87 Difference]: Start difference. First operand 1035 states and 1819 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:44,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:44,652 INFO L93 Difference]: Finished difference Result 1246 states and 2091 transitions. [2021-08-06 20:15:44,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-08-06 20:15:44,652 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:15:44,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:44,654 INFO L225 Difference]: With dead ends: 1246 [2021-08-06 20:15:44,654 INFO L226 Difference]: Without dead ends: 1222 [2021-08-06 20:15:44,654 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4188 ImplicationChecksByTransitivity, 3133.1ms TimeCoverageRelationStatistics Valid=1537, Invalid=12035, Unknown=0, NotChecked=0, Total=13572 [2021-08-06 20:15:44,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-08-06 20:15:44,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1045. [2021-08-06 20:15:44,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 1.7681992337164751) internal successors, (1846), 1044 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:44,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 1846 transitions. [2021-08-06 20:15:44,664 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 1846 transitions. Word has length 43 [2021-08-06 20:15:44,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:44,664 INFO L470 AbstractCegarLoop]: Abstraction has 1045 states and 1846 transitions. [2021-08-06 20:15:44,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:44,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 1846 transitions. [2021-08-06 20:15:44,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:15:44,665 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:44,665 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:44,700 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 20:15:44,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:44,866 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:44,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:44,866 INFO L82 PathProgramCache]: Analyzing trace with hash -188225751, now seen corresponding path program 98 times [2021-08-06 20:15:44,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:44,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538597073] [2021-08-06 20:15:44,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:44,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:45,149 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:15:45,153 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:15:45,183 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:15:45,186 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:15:45,251 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:45,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:45,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538597073] [2021-08-06 20:15:45,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538597073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:45,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980372868] [2021-08-06 20:15:45,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:15:45,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:45,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:45,252 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 20:15:45,252 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 20:15:50,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:15:50,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:50,776 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-06 20:15:50,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:51,270 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:51,272 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:51,332 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:51,334 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:51,391 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:51,394 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:51,485 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:15:51,487 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:15:51,687 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:15:51,690 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:15:51,862 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:15:51,864 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:15:51,993 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:51,995 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:15:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:52,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980372868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:52,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:52,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-06 20:15:52,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896829701] [2021-08-06 20:15:52,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 20:15:52,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:52,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 20:15:52,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1586, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:15:52,155 INFO L87 Difference]: Start difference. First operand 1045 states and 1846 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:55,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:55,342 INFO L93 Difference]: Finished difference Result 1281 states and 2156 transitions. [2021-08-06 20:15:55,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-08-06 20:15:55,342 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:15:55,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:55,344 INFO L225 Difference]: With dead ends: 1281 [2021-08-06 20:15:55,344 INFO L226 Difference]: Without dead ends: 1261 [2021-08-06 20:15:55,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4575 ImplicationChecksByTransitivity, 3323.3ms TimeCoverageRelationStatistics Valid=1720, Invalid=13042, Unknown=0, NotChecked=0, Total=14762 [2021-08-06 20:15:55,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2021-08-06 20:15:55,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1063. [2021-08-06 20:15:55,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1062 states have (on average 1.771186440677966) internal successors, (1881), 1062 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:55,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1881 transitions. [2021-08-06 20:15:55,356 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1881 transitions. Word has length 43 [2021-08-06 20:15:55,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:55,356 INFO L470 AbstractCegarLoop]: Abstraction has 1063 states and 1881 transitions. [2021-08-06 20:15:55,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:55,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1881 transitions. [2021-08-06 20:15:55,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:15:55,357 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:55,357 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:55,392 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 20:15:55,572 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,SelfDestructingSolverStorable99 [2021-08-06 20:15:55,573 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:55,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:55,573 INFO L82 PathProgramCache]: Analyzing trace with hash 820072233, now seen corresponding path program 99 times [2021-08-06 20:15:55,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:55,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387475687] [2021-08-06 20:15:55,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:55,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:55,852 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:15:55,856 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:15:55,889 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:15:55,893 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:15:55,923 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:15:55,926 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:15:55,988 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:55,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:55,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387475687] [2021-08-06 20:15:55,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387475687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:55,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296095564] [2021-08-06 20:15:55,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:15:55,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:55,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:55,989 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 20:15:55,991 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 20:16:01,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 20:16:01,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:01,495 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-06 20:16:01,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:01,954 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:01,956 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:02,020 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:02,022 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:02,079 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:02,081 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:02,172 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:16:02,174 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:16:02,222 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:16:02,224 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:16:02,272 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:16:02,274 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:16:02,404 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:02,406 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:02,549 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:02,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296095564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:02,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:02,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-06 20:16:02,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322215436] [2021-08-06 20:16:02,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 20:16:02,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:02,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 20:16:02,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1572, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:16:02,550 INFO L87 Difference]: Start difference. First operand 1063 states and 1881 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:05,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:05,475 INFO L93 Difference]: Finished difference Result 1361 states and 2279 transitions. [2021-08-06 20:16:05,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-08-06 20:16:05,475 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:16:05,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:05,476 INFO L225 Difference]: With dead ends: 1361 [2021-08-06 20:16:05,476 INFO L226 Difference]: Without dead ends: 1335 [2021-08-06 20:16:05,477 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4628 ImplicationChecksByTransitivity, 2839.0ms TimeCoverageRelationStatistics Valid=1794, Invalid=13212, Unknown=0, NotChecked=0, Total=15006 [2021-08-06 20:16:05,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1335 states. [2021-08-06 20:16:05,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1335 to 1013. [2021-08-06 20:16:05,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 1.7529644268774704) internal successors, (1774), 1012 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:05,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1774 transitions. [2021-08-06 20:16:05,487 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1774 transitions. Word has length 43 [2021-08-06 20:16:05,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:05,487 INFO L470 AbstractCegarLoop]: Abstraction has 1013 states and 1774 transitions. [2021-08-06 20:16:05,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:05,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1774 transitions. [2021-08-06 20:16:05,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:16:05,488 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:05,488 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:05,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-06 20:16:05,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:05,688 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:16:05,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:05,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1450331621, now seen corresponding path program 100 times [2021-08-06 20:16:05,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:05,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75306743] [2021-08-06 20:16:05,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:05,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:05,985 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:16:05,989 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:16:06,019 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:16:06,023 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:16:06,083 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:06,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:06,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75306743] [2021-08-06 20:16:06,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75306743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:06,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539378351] [2021-08-06 20:16:06,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:16:06,084 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:06,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:06,085 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 20:16:06,085 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 20:16:12,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:16:12,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:12,302 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-06 20:16:12,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:12,775 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:12,778 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:12,834 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:12,836 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:12,893 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:12,895 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:12,952 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:12,955 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:13,097 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:16:13,099 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:16:13,148 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:16:13,150 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:16:13,229 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:13,232 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:13,491 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:13,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539378351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:13,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:13,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-06 20:16:13,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133455039] [2021-08-06 20:16:13,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 20:16:13,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:13,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 20:16:13,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1591, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:16:13,492 INFO L87 Difference]: Start difference. First operand 1013 states and 1774 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:17,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:17,649 INFO L93 Difference]: Finished difference Result 1175 states and 1968 transitions. [2021-08-06 20:16:17,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-08-06 20:16:17,649 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:16:17,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:17,650 INFO L225 Difference]: With dead ends: 1175 [2021-08-06 20:16:17,650 INFO L226 Difference]: Without dead ends: 1151 [2021-08-06 20:16:17,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4311 ImplicationChecksByTransitivity, 4023.2ms TimeCoverageRelationStatistics Valid=1516, Invalid=12290, Unknown=0, NotChecked=0, Total=13806 [2021-08-06 20:16:17,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2021-08-06 20:16:17,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 1016. [2021-08-06 20:16:17,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 1.7527093596059113) internal successors, (1779), 1015 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:17,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1779 transitions. [2021-08-06 20:16:17,660 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1779 transitions. Word has length 43 [2021-08-06 20:16:17,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:17,660 INFO L470 AbstractCegarLoop]: Abstraction has 1016 states and 1779 transitions. [2021-08-06 20:16:17,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:17,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1779 transitions. [2021-08-06 20:16:17,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:16:17,661 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:17,661 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:17,696 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 20:16:17,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:17,865 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:16:17,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:17,865 INFO L82 PathProgramCache]: Analyzing trace with hash -237914651, now seen corresponding path program 101 times [2021-08-06 20:16:17,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:17,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469560561] [2021-08-06 20:16:17,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:17,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:18,167 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:16:18,171 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:16:18,203 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:16:18,206 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:16:18,276 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:18,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:18,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469560561] [2021-08-06 20:16:18,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469560561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:18,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547979623] [2021-08-06 20:16:18,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:16:18,276 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:18,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:18,277 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 20:16:18,293 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 20:16:24,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 20:16:24,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:24,646 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-06 20:16:24,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:25,147 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:25,150 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:25,205 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:25,207 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:25,263 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:25,265 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:25,321 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:25,323 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:25,414 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:16:25,416 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:16:25,513 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:16:25,515 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:16:25,594 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:25,596 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:25,741 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:25,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547979623] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:25,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:25,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-06 20:16:25,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116931095] [2021-08-06 20:16:25,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 20:16:25,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:25,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 20:16:25,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1583, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:16:25,743 INFO L87 Difference]: Start difference. First operand 1016 states and 1779 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:28,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:28,481 INFO L93 Difference]: Finished difference Result 1211 states and 2029 transitions. [2021-08-06 20:16:28,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-08-06 20:16:28,482 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:16:28,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:28,483 INFO L225 Difference]: With dead ends: 1211 [2021-08-06 20:16:28,483 INFO L226 Difference]: Without dead ends: 1191 [2021-08-06 20:16:28,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4716 ImplicationChecksByTransitivity, 2798.7ms TimeCoverageRelationStatistics Valid=1716, Invalid=13290, Unknown=0, NotChecked=0, Total=15006 [2021-08-06 20:16:28,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-08-06 20:16:28,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1024. [2021-08-06 20:16:28,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 1.7595307917888563) internal successors, (1800), 1023 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:28,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1800 transitions. [2021-08-06 20:16:28,493 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1800 transitions. Word has length 43 [2021-08-06 20:16:28,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:28,493 INFO L470 AbstractCegarLoop]: Abstraction has 1024 states and 1800 transitions. [2021-08-06 20:16:28,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:28,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1800 transitions. [2021-08-06 20:16:28,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:16:28,494 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:28,494 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:28,526 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 20:16:28,699 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,SelfDestructingSolverStorable102 [2021-08-06 20:16:28,699 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:16:28,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:28,699 INFO L82 PathProgramCache]: Analyzing trace with hash 770383333, now seen corresponding path program 102 times [2021-08-06 20:16:28,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:28,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917838795] [2021-08-06 20:16:28,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:28,699 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:28,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:28,960 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:16:28,963 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:16:28,995 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:16:28,998 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:16:29,027 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:16:29,030 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:16:29,090 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:29,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:29,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917838795] [2021-08-06 20:16:29,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917838795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:29,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474427458] [2021-08-06 20:16:29,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:16:29,090 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:29,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:29,091 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 20:16:29,091 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 20:16:34,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 20:16:34,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:34,877 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-06 20:16:34,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:35,332 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:35,334 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:35,394 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:35,396 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:35,453 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:35,471 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:35,531 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:35,533 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:35,637 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:16:35,639 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:16:35,694 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:16:35,696 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:16:35,828 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:35,831 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:35,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474427458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:35,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:35,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-06 20:16:35,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882657167] [2021-08-06 20:16:35,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 20:16:35,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:35,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 20:16:35,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1569, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:16:35,975 INFO L87 Difference]: Start difference. First operand 1024 states and 1800 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:39,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:39,197 INFO L93 Difference]: Finished difference Result 1298 states and 2164 transitions. [2021-08-06 20:16:39,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-08-06 20:16:39,198 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:16:39,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:39,199 INFO L225 Difference]: With dead ends: 1298 [2021-08-06 20:16:39,199 INFO L226 Difference]: Without dead ends: 1272 [2021-08-06 20:16:39,200 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4761 ImplicationChecksByTransitivity, 3001.9ms TimeCoverageRelationStatistics Valid=1804, Invalid=13448, Unknown=0, NotChecked=0, Total=15252 [2021-08-06 20:16:39,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-08-06 20:16:39,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 997. [2021-08-06 20:16:39,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 1.7459839357429718) internal successors, (1739), 996 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:39,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1739 transitions. [2021-08-06 20:16:39,210 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1739 transitions. Word has length 43 [2021-08-06 20:16:39,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:39,211 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 1739 transitions. [2021-08-06 20:16:39,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:39,211 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1739 transitions. [2021-08-06 20:16:39,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:16:39,211 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:39,211 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:39,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-06 20:16:39,412 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,SelfDestructingSolverStorable103 [2021-08-06 20:16:39,412 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:16:39,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:39,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1355283551, now seen corresponding path program 103 times [2021-08-06 20:16:39,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:39,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812112599] [2021-08-06 20:16:39,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:39,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:39,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:39,692 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:16:39,696 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:16:39,727 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:16:39,732 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:16:39,798 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:39,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:39,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812112599] [2021-08-06 20:16:39,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812112599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:39,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190039982] [2021-08-06 20:16:39,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:16:39,799 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:39,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:39,799 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 20:16:39,800 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 20:16:45,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:45,665 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-06 20:16:45,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:46,517 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:46,519 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:46,574 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:46,577 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:46,632 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:46,634 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:46,690 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:46,693 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:46,749 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:46,751 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:46,894 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:16:46,896 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:16:46,975 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:46,978 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:47,120 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:47,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190039982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:47,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:47,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-06 20:16:47,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992890925] [2021-08-06 20:16:47,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 20:16:47,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:47,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 20:16:47,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1581, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:16:47,121 INFO L87 Difference]: Start difference. First operand 997 states and 1739 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:50,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:50,232 INFO L93 Difference]: Finished difference Result 1144 states and 1915 transitions. [2021-08-06 20:16:50,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-08-06 20:16:50,233 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:16:50,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:50,234 INFO L225 Difference]: With dead ends: 1144 [2021-08-06 20:16:50,234 INFO L226 Difference]: Without dead ends: 1124 [2021-08-06 20:16:50,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4846 ImplicationChecksByTransitivity, 3163.6ms TimeCoverageRelationStatistics Valid=1688, Invalid=13564, Unknown=0, NotChecked=0, Total=15252 [2021-08-06 20:16:50,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2021-08-06 20:16:50,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1000. [2021-08-06 20:16:50,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 999 states have (on average 1.7457457457457457) internal successors, (1744), 999 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:50,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1744 transitions. [2021-08-06 20:16:50,248 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1744 transitions. Word has length 43 [2021-08-06 20:16:50,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:50,248 INFO L470 AbstractCegarLoop]: Abstraction has 1000 states and 1744 transitions. [2021-08-06 20:16:50,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:50,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1744 transitions. [2021-08-06 20:16:50,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:16:50,249 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:50,249 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:50,289 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 20:16:50,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:50,477 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:16:50,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:50,477 INFO L82 PathProgramCache]: Analyzing trace with hash -346985567, now seen corresponding path program 104 times [2021-08-06 20:16:50,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:50,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609858898] [2021-08-06 20:16:50,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:50,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:51,203 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:16:51,206 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:16:51,246 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:16:51,250 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 26.7 percent of original size [2021-08-06 20:16:51,285 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:16:51,288 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 22.3 percent of original size [2021-08-06 20:16:51,358 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:51,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:51,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609858898] [2021-08-06 20:16:51,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609858898] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:51,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628849649] [2021-08-06 20:16:51,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:16:51,358 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:51,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:51,359 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 20:16:51,380 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 20:16:57,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:16:57,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:57,335 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-06 20:16:57,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:57,893 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:57,896 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:57,951 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:57,953 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:58,021 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:58,023 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:58,078 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:58,080 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:58,136 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:58,138 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:58,230 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:16:58,232 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:16:58,548 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:58,550 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:16:58,693 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:58,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628849649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:58,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:58,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-06 20:16:58,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847370448] [2021-08-06 20:16:58,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 20:16:58,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:58,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 20:16:58,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1567, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:16:58,694 INFO L87 Difference]: Start difference. First operand 1000 states and 1744 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:02,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:17:02,839 INFO L93 Difference]: Finished difference Result 1222 states and 2025 transitions. [2021-08-06 20:17:02,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-08-06 20:17:02,840 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:17:02,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:17:02,841 INFO L225 Difference]: With dead ends: 1222 [2021-08-06 20:17:02,841 INFO L226 Difference]: Without dead ends: 1196 [2021-08-06 20:17:02,842 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4904 ImplicationChecksByTransitivity, 4528.0ms TimeCoverageRelationStatistics Valid=1800, Invalid=13700, Unknown=0, NotChecked=0, Total=15500 [2021-08-06 20:17:02,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-08-06 20:17:02,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 981. [2021-08-06 20:17:02,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 1.7346938775510203) internal successors, (1700), 980 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:02,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1700 transitions. [2021-08-06 20:17:02,851 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1700 transitions. Word has length 43 [2021-08-06 20:17:02,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:17:02,851 INFO L470 AbstractCegarLoop]: Abstraction has 981 states and 1700 transitions. [2021-08-06 20:17:02,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:02,852 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1700 transitions. [2021-08-06 20:17:02,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:17:02,852 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:17:02,852 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:17:02,893 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 20:17:03,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:17:03,077 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:17:03,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:17:03,077 INFO L82 PathProgramCache]: Analyzing trace with hash -2077755299, now seen corresponding path program 105 times [2021-08-06 20:17:03,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:17:03,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585686154] [2021-08-06 20:17:03,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:17:03,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:17:03,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:17:03,565 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 32.0 percent of original size [2021-08-06 20:17:03,568 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 32.0 percent of original size [2021-08-06 20:17:03,620 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 63.9 percent of original size [2021-08-06 20:17:03,622 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 63.9 percent of original size [2021-08-06 20:17:03,650 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 59.4 percent of original size [2021-08-06 20:17:03,651 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 59.4 percent of original size [2021-08-06 20:17:03,757 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:17:03,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:17:03,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585686154] [2021-08-06 20:17:03,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585686154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:03,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212471504] [2021-08-06 20:17:03,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:17:03,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:17:03,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:17:03,759 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 20:17:03,760 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 20:17:10,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 20:17:10,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:17:10,679 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-06 20:17:10,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:17:11,543 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:17:11,546 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:17:11,607 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:17:11,609 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:17:11,950 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:17:11,952 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:17:12,013 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:17:12,015 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:17:12,447 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:17:12,450 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:17:12,511 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:17:12,514 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:17:12,723 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:17:12,726 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:17:12,882 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:17:12,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212471504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:12,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:17:12,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-06 20:17:12,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402994441] [2021-08-06 20:17:12,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 20:17:12,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:17:12,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 20:17:12,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1554, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:17:12,883 INFO L87 Difference]: Start difference. First operand 981 states and 1700 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:19,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:17:19,434 INFO L93 Difference]: Finished difference Result 1333 states and 2207 transitions. [2021-08-06 20:17:19,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-08-06 20:17:19,434 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:17:19,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:17:19,435 INFO L225 Difference]: With dead ends: 1333 [2021-08-06 20:17:19,436 INFO L226 Difference]: Without dead ends: 1315 [2021-08-06 20:17:19,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6910 ImplicationChecksByTransitivity, 6880.3ms TimeCoverageRelationStatistics Valid=2267, Invalid=18039, Unknown=0, NotChecked=0, Total=20306 [2021-08-06 20:17:19,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2021-08-06 20:17:19,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 929. [2021-08-06 20:17:19,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 1.7209051724137931) internal successors, (1597), 928 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:19,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1597 transitions. [2021-08-06 20:17:19,447 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1597 transitions. Word has length 43 [2021-08-06 20:17:19,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:17:19,447 INFO L470 AbstractCegarLoop]: Abstraction has 929 states and 1597 transitions. [2021-08-06 20:17:19,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:19,447 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1597 transitions. [2021-08-06 20:17:19,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:17:19,448 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:17:19,448 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:17:19,486 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 20:17:19,672 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,SelfDestructingSolverStorable106 [2021-08-06 20:17:19,673 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:17:19,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:17:19,673 INFO L82 PathProgramCache]: Analyzing trace with hash -174564499, now seen corresponding path program 106 times [2021-08-06 20:17:19,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:17:19,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130303444] [2021-08-06 20:17:19,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:17:19,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:17:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:17:19,807 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 112, result has 27.3 percent of original size [2021-08-06 20:17:19,812 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 112, result has 27.3 percent of original size [2021-08-06 20:17:19,836 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 87.9 percent of original size [2021-08-06 20:17:19,837 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 87.9 percent of original size [2021-08-06 20:17:19,858 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 88.2 percent of original size [2021-08-06 20:17:19,859 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 88.2 percent of original size [2021-08-06 20:17:19,887 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 87.9 percent of original size [2021-08-06 20:17:19,889 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 87.9 percent of original size [2021-08-06 20:17:19,898 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 87.9 percent of original size [2021-08-06 20:17:19,899 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 87.9 percent of original size [2021-08-06 20:17:20,121 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 82.5 percent of original size [2021-08-06 20:17:20,123 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 82.5 percent of original size [2021-08-06 20:17:20,160 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 81.6 percent of original size [2021-08-06 20:17:20,163 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 81.6 percent of original size [2021-08-06 20:17:20,273 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:17:20,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:17:20,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130303444] [2021-08-06 20:17:20,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130303444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:20,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079977889] [2021-08-06 20:17:20,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:17:20,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:17:20,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:17:20,274 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 20:17:20,275 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 20:17:26,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:17:26,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:17:26,441 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-06 20:17:26,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:17:26,674 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:17:26,676 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:17:26,766 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:17:26,768 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:17:26,813 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:17:26,815 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:17:26,865 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 41.7 percent of original size [2021-08-06 20:17:26,867 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 41.7 percent of original size [2021-08-06 20:17:27,072 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:17:27,074 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:17:27,132 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:17:27,134 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:17:27,263 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:17:27,266 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:17:27,475 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:17:27,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079977889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:27,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:17:27,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2021-08-06 20:17:27,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675322214] [2021-08-06 20:17:27,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-06 20:17:27,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:17:27,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-06 20:17:27,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1454, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:17:27,476 INFO L87 Difference]: Start difference. First operand 929 states and 1597 transitions. Second operand has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:36,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:17:36,949 INFO L93 Difference]: Finished difference Result 1799 states and 2994 transitions. [2021-08-06 20:17:36,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-08-06 20:17:36,950 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:17:36,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:17:36,952 INFO L225 Difference]: With dead ends: 1799 [2021-08-06 20:17:36,952 INFO L226 Difference]: Without dead ends: 1781 [2021-08-06 20:17:36,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13943 ImplicationChecksByTransitivity, 8933.9ms TimeCoverageRelationStatistics Valid=3705, Invalid=31451, Unknown=0, NotChecked=0, Total=35156 [2021-08-06 20:17:36,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2021-08-06 20:17:36,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1028. [2021-08-06 20:17:36,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1027 states have (on average 1.7195715676728336) internal successors, (1766), 1027 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:36,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1766 transitions. [2021-08-06 20:17:36,965 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1766 transitions. Word has length 43 [2021-08-06 20:17:36,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:17:36,965 INFO L470 AbstractCegarLoop]: Abstraction has 1028 states and 1766 transitions. [2021-08-06 20:17:36,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:36,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1766 transitions. [2021-08-06 20:17:36,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:17:36,966 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:17:36,966 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:17:36,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-06 20:17:37,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-06 20:17:37,168 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:17:37,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:17:37,168 INFO L82 PathProgramCache]: Analyzing trace with hash 737000045, now seen corresponding path program 107 times [2021-08-06 20:17:37,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:17:37,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378784208] [2021-08-06 20:17:37,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:17:37,168 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:17:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:17:37,397 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 112, result has 27.3 percent of original size [2021-08-06 20:17:37,401 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 112, result has 27.3 percent of original size [2021-08-06 20:17:37,426 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 87.9 percent of original size [2021-08-06 20:17:37,427 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 87.9 percent of original size [2021-08-06 20:17:37,448 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 87.9 percent of original size [2021-08-06 20:17:37,449 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 87.9 percent of original size [2021-08-06 20:17:37,708 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 82.5 percent of original size [2021-08-06 20:17:37,710 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 82.5 percent of original size [2021-08-06 20:17:37,743 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 81.6 percent of original size [2021-08-06 20:17:37,745 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 81.6 percent of original size [2021-08-06 20:17:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:17:37,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:17:37,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378784208] [2021-08-06 20:17:37,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378784208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:37,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073735326] [2021-08-06 20:17:37,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:17:37,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:17:37,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:17:37,845 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 20:17:37,845 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 20:17:43,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 20:17:43,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:17:43,891 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-06 20:17:43,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:17:44,172 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:17:44,174 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:17:44,225 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:17:44,227 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:17:44,284 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 41.7 percent of original size [2021-08-06 20:17:44,290 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 41.7 percent of original size [2021-08-06 20:17:44,669 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:17:44,672 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:17:44,734 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:17:44,737 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:17:44,797 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:17:44,799 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:17:44,943 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:17:44,946 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:17:45,183 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:17:45,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073735326] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:45,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:17:45,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2021-08-06 20:17:45,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411328497] [2021-08-06 20:17:45,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-06 20:17:45,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:17:45,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-06 20:17:45,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1531, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 20:17:45,184 INFO L87 Difference]: Start difference. First operand 1028 states and 1766 transitions. Second operand has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:18:00,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:18:00,613 INFO L93 Difference]: Finished difference Result 2421 states and 3990 transitions. [2021-08-06 20:18:00,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2021-08-06 20:18:00,613 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:18:00,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:18:00,616 INFO L225 Difference]: With dead ends: 2421 [2021-08-06 20:18:00,616 INFO L226 Difference]: Without dead ends: 2379 [2021-08-06 20:18:00,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17894 ImplicationChecksByTransitivity, 14453.2ms TimeCoverageRelationStatistics Valid=4455, Invalid=39855, Unknown=0, NotChecked=0, Total=44310 [2021-08-06 20:18:00,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2021-08-06 20:18:00,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 1202. [2021-08-06 20:18:00,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 1201 states have (on average 1.720233139050791) internal successors, (2066), 1201 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:18:00,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 2066 transitions. [2021-08-06 20:18:00,634 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 2066 transitions. Word has length 43 [2021-08-06 20:18:00,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:18:00,634 INFO L470 AbstractCegarLoop]: Abstraction has 1202 states and 2066 transitions. [2021-08-06 20:18:00,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:18:00,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 2066 transitions. [2021-08-06 20:18:00,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:18:00,635 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:18:00,635 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:18:00,677 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 20:18:00,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:18:00,853 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:18:00,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:18:00,853 INFO L82 PathProgramCache]: Analyzing trace with hash 219273303, now seen corresponding path program 108 times [2021-08-06 20:18:00,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:18:00,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388281756] [2021-08-06 20:18:00,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:18:00,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:18:00,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:18:01,701 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 20:18:01,703 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 20:18:01,735 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 20:18:01,736 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 20:18:01,763 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:18:01,764 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:18:02,261 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:18:02,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:18:02,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388281756] [2021-08-06 20:18:02,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388281756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:18:02,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291385387] [2021-08-06 20:18:02,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:18:02,262 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:18:02,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:18:02,262 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 20:18:02,264 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 20:18:08,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-06 20:18:08,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:18:08,917 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 69 conjunts are in the unsatisfiable core [2021-08-06 20:18:08,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:18:09,522 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:18:09,525 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:18:09,581 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:18:09,584 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:18:09,641 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:18:09,643 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:18:09,700 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:18:09,702 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:18:09,764 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:18:09,766 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:18:09,855 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:18:09,857 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:18:09,947 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 55.6 percent of original size [2021-08-06 20:18:09,950 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 55.6 percent of original size [2021-08-06 20:18:10,208 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:18:10,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291385387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:18:10,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:18:10,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2021-08-06 20:18:10,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666392070] [2021-08-06 20:18:10,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-06 20:18:10,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:18:10,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-06 20:18:10,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1717, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 20:18:10,210 INFO L87 Difference]: Start difference. First operand 1202 states and 2066 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:18:14,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:18:14,025 INFO L93 Difference]: Finished difference Result 1746 states and 2897 transitions. [2021-08-06 20:18:14,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-08-06 20:18:14,025 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 20:18:14,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:18:14,027 INFO L225 Difference]: With dead ends: 1746 [2021-08-06 20:18:14,027 INFO L226 Difference]: Without dead ends: 1714 [2021-08-06 20:18:14,029 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4184 ImplicationChecksByTransitivity, 3945.9ms TimeCoverageRelationStatistics Valid=1839, Invalid=12441, Unknown=0, NotChecked=0, Total=14280 [2021-08-06 20:18:14,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-08-06 20:18:14,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1235. [2021-08-06 20:18:14,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1235 states, 1234 states have (on average 1.7244732576985413) internal successors, (2128), 1234 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:18:14,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 2128 transitions. [2021-08-06 20:18:14,051 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 2128 transitions. Word has length 45 [2021-08-06 20:18:14,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:18:14,051 INFO L470 AbstractCegarLoop]: Abstraction has 1235 states and 2128 transitions. [2021-08-06 20:18:14,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:18:14,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 2128 transitions. [2021-08-06 20:18:14,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:18:14,066 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:18:14,066 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:18:14,103 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 20:18:14,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:18:14,285 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:18:14,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:18:14,285 INFO L82 PathProgramCache]: Analyzing trace with hash -328347341, now seen corresponding path program 109 times [2021-08-06 20:18:14,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:18:14,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784684806] [2021-08-06 20:18:14,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:18:14,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:18:14,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:18:14,611 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 20:18:14,617 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 20:18:14,642 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 20:18:14,643 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 20:18:14,676 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:18:14,677 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:18:14,752 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 42 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:18:14,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:18:14,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784684806] [2021-08-06 20:18:14,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784684806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:18:14,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148639173] [2021-08-06 20:18:14,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:18:14,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:18:14,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:18:14,753 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 20:18:14,754 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 20:18:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:18:20,978 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 69 conjunts are in the unsatisfiable core [2021-08-06 20:18:20,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:18:21,428 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:18:21,430 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:18:21,477 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:18:21,479 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:18:21,526 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:18:21,528 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:18:21,575 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:18:21,577 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:18:21,623 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:18:21,625 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:18:21,675 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:18:21,677 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:18:21,754 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:18:21,835 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:18:22,176 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:18:22,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148639173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:18:22,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:18:22,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23] total 38 [2021-08-06 20:18:22,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545356172] [2021-08-06 20:18:22,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-06 20:18:22,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:18:22,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-06 20:18:22,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1290, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:18:22,177 INFO L87 Difference]: Start difference. First operand 1235 states and 2128 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:18:27,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:18:27,011 INFO L93 Difference]: Finished difference Result 2041 states and 3310 transitions. [2021-08-06 20:18:27,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-08-06 20:18:27,011 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 20:18:27,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:18:27,013 INFO L225 Difference]: With dead ends: 2041 [2021-08-06 20:18:27,013 INFO L226 Difference]: Without dead ends: 1995 [2021-08-06 20:18:27,014 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11247 ImplicationChecksByTransitivity, 4368.9ms TimeCoverageRelationStatistics Valid=3525, Invalid=26577, Unknown=0, NotChecked=0, Total=30102 [2021-08-06 20:18:27,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2021-08-06 20:18:27,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1286. [2021-08-06 20:18:27,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 1285 states have (on average 1.7299610894941635) internal successors, (2223), 1285 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:18:27,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 2223 transitions. [2021-08-06 20:18:27,026 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 2223 transitions. Word has length 45 [2021-08-06 20:18:27,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:18:27,026 INFO L470 AbstractCegarLoop]: Abstraction has 1286 states and 2223 transitions. [2021-08-06 20:18:27,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:18:27,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 2223 transitions. [2021-08-06 20:18:27,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:18:27,027 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:18:27,027 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:18:27,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-06 20:18:27,227 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,SelfDestructingSolverStorable110 [2021-08-06 20:18:27,228 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:18:27,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:18:27,228 INFO L82 PathProgramCache]: Analyzing trace with hash -799856269, now seen corresponding path program 110 times [2021-08-06 20:18:27,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:18:27,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421993054] [2021-08-06 20:18:27,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:18:27,228 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:18:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:18:27,391 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:18:27,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:18:27,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421993054] [2021-08-06 20:18:27,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421993054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:18:27,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556185865] [2021-08-06 20:18:27,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:18:27,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:18:27,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:18:27,392 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 20:18:27,393 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 20:18:33,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:18:33,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:18:33,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:18:33,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:18:34,455 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:18:34,461 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:18:34,541 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:18:34,542 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:18:34,557 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:18:34,558 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:18:34,646 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:18:34,648 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:18:34,661 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:18:34,662 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:18:34,687 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:18:34,688 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:18:34,706 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:18:34,707 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:18:34,730 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 20:18:34,731 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 20:18:34,736 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:18:34,736 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:18:34,752 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:18:34,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556185865] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:18:34,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:18:34,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-08-06 20:18:34,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637869519] [2021-08-06 20:18:34,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:18:34,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:18:34,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:18:34,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:18:34,753 INFO L87 Difference]: Start difference. First operand 1286 states and 2223 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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 20:18:35,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:18:35,930 INFO L93 Difference]: Finished difference Result 1511 states and 2589 transitions. [2021-08-06 20:18:35,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 20:18:35,931 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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 45 [2021-08-06 20:18:35,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:18:35,932 INFO L225 Difference]: With dead ends: 1511 [2021-08-06 20:18:35,932 INFO L226 Difference]: Without dead ends: 1457 [2021-08-06 20:18:35,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 472.7ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:18:35,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2021-08-06 20:18:35,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 1350. [2021-08-06 20:18:35,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 1.70941438102298) internal successors, (2306), 1349 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:18:35,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 2306 transitions. [2021-08-06 20:18:35,943 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 2306 transitions. Word has length 45 [2021-08-06 20:18:35,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:18:35,944 INFO L470 AbstractCegarLoop]: Abstraction has 1350 states and 2306 transitions. [2021-08-06 20:18:35,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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 20:18:35,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 2306 transitions. [2021-08-06 20:18:35,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:18:35,945 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:18:35,945 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:18:35,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-08-06 20:18:36,164 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,SelfDestructingSolverStorable111 [2021-08-06 20:18:36,165 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:18:36,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:18:36,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1840300575, now seen corresponding path program 111 times [2021-08-06 20:18:36,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:18:36,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570168821] [2021-08-06 20:18:36,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:18:36,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:18:36,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:18:38,001 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 40.1 percent of original size [2021-08-06 20:18:38,260 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 40.1 percent of original size [2021-08-06 20:18:38,761 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 75.0 percent of original size [2021-08-06 20:18:38,763 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 75.0 percent of original size [2021-08-06 20:18:38,803 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 77.1 percent of original size [2021-08-06 20:18:38,806 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 77.1 percent of original size [2021-08-06 20:18:38,852 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 30, result has 48.3 percent of original size [2021-08-06 20:18:38,855 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 30, result has 48.3 percent of original size [2021-08-06 20:18:38,900 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 30, result has 43.4 percent of original size [2021-08-06 20:18:38,902 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 30, result has 43.4 percent of original size [2021-08-06 20:18:38,944 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 69.2 percent of original size [2021-08-06 20:18:38,946 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 69.2 percent of original size [2021-08-06 20:18:38,975 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 29.4 percent of original size [2021-08-06 20:18:38,976 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 29.4 percent of original size [2021-08-06 20:18:38,997 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:18:38,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:18:38,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570168821] [2021-08-06 20:18:38,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570168821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:18:38,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284353829] [2021-08-06 20:18:38,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:18:38,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:18:38,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:18:38,998 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 20:18:38,999 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 20:18:46,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 20:18:46,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:18:46,250 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-06 20:18:46,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:18:47,069 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 58.6 percent of original size [2021-08-06 20:18:47,072 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 58.6 percent of original size [2021-08-06 20:18:47,209 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 60.7 percent of original size [2021-08-06 20:18:47,212 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 60.7 percent of original size [2021-08-06 20:18:47,300 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 60.7 percent of original size [2021-08-06 20:18:47,303 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 60.7 percent of original size [2021-08-06 20:18:47,387 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 60.7 percent of original size [2021-08-06 20:18:47,390 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 60.7 percent of original size [2021-08-06 20:18:47,474 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 60.7 percent of original size [2021-08-06 20:18:47,477 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 60.7 percent of original size [2021-08-06 20:18:47,672 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 60.7 percent of original size [2021-08-06 20:18:47,675 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 60.7 percent of original size [2021-08-06 20:18:47,797 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 50.9 percent of original size [2021-08-06 20:18:47,800 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 50.9 percent of original size [2021-08-06 20:18:48,259 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:18:48,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284353829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:18:48,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:18:48,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 43 [2021-08-06 20:18:48,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906303100] [2021-08-06 20:18:48,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-06 20:18:48,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:18:48,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-06 20:18:48,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1752, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 20:18:48,260 INFO L87 Difference]: Start difference. First operand 1350 states and 2306 transitions. Second operand has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:18:49,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:18:49,395 INFO L93 Difference]: Finished difference Result 1379 states and 2346 transitions. [2021-08-06 20:18:49,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 20:18:49,396 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 20:18:49,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:18:49,397 INFO L225 Difference]: With dead ends: 1379 [2021-08-06 20:18:49,397 INFO L226 Difference]: Without dead ends: 1369 [2021-08-06 20:18:49,397 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 2687.2ms TimeCoverageRelationStatistics Valid=223, Invalid=3199, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 20:18:49,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-08-06 20:18:49,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1361. [2021-08-06 20:18:49,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 1.7080882352941176) internal successors, (2323), 1360 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 20:18:49,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 2323 transitions. [2021-08-06 20:18:49,407 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 2323 transitions. Word has length 45 [2021-08-06 20:18:49,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:18:49,407 INFO L470 AbstractCegarLoop]: Abstraction has 1361 states and 2323 transitions. [2021-08-06 20:18:49,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:18:49,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 2323 transitions. [2021-08-06 20:18:49,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:18:49,408 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:18:49,408 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:18:49,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-08-06 20:18:49,609 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,SelfDestructingSolverStorable112 [2021-08-06 20:18:49,609 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:18:49,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:18:49,610 INFO L82 PathProgramCache]: Analyzing trace with hash -889728925, now seen corresponding path program 112 times [2021-08-06 20:18:49,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:18:49,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307052711] [2021-08-06 20:18:49,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:18:49,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:18:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:18:49,852 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 86, result has 33.3 percent of original size [2021-08-06 20:18:49,856 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 86, result has 33.3 percent of original size [2021-08-06 20:18:49,978 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 55.1 percent of original size [2021-08-06 20:18:49,980 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 55.1 percent of original size [2021-08-06 20:18:50,018 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 50.0 percent of original size [2021-08-06 20:18:50,020 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 50.0 percent of original size [2021-08-06 20:18:50,092 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:18:50,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:18:50,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307052711] [2021-08-06 20:18:50,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307052711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:18:50,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835562838] [2021-08-06 20:18:50,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:18:50,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:18:50,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:18:50,093 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 20:18:50,093 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 20:18:56,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:18:56,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:18:56,395 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-06 20:18:56,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:18:56,809 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:18:56,811 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:18:56,858 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:18:56,860 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:18:56,953 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:18:56,955 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:18:57,012 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:18:57,014 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:18:57,071 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:18:57,073 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:18:57,130 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:18:57,133 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:18:57,227 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 48.1 percent of original size [2021-08-06 20:18:57,230 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 48.1 percent of original size [2021-08-06 20:18:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:18:57,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835562838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:18:57,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:18:57,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 42 [2021-08-06 20:18:57,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259119745] [2021-08-06 20:18:57,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 20:18:57,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:18:57,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 20:18:57,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1659, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:18:57,652 INFO L87 Difference]: Start difference. First operand 1361 states and 2323 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:19:00,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:19:00,305 INFO L93 Difference]: Finished difference Result 1532 states and 2552 transitions. [2021-08-06 20:19:00,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-08-06 20:19:00,306 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 20:19:00,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:19:00,307 INFO L225 Difference]: With dead ends: 1532 [2021-08-06 20:19:00,307 INFO L226 Difference]: Without dead ends: 1512 [2021-08-06 20:19:00,308 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2643 ImplicationChecksByTransitivity, 2312.0ms TimeCoverageRelationStatistics Valid=566, Invalid=8176, Unknown=0, NotChecked=0, Total=8742 [2021-08-06 20:19:00,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1512 states. [2021-08-06 20:19:00,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1512 to 1231. [2021-08-06 20:19:00,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1230 states have (on average 1.7130081300813007) internal successors, (2107), 1230 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:19:00,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 2107 transitions. [2021-08-06 20:19:00,319 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 2107 transitions. Word has length 45 [2021-08-06 20:19:00,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:19:00,319 INFO L470 AbstractCegarLoop]: Abstraction has 1231 states and 2107 transitions. [2021-08-06 20:19:00,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:19:00,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 2107 transitions. [2021-08-06 20:19:00,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:19:00,320 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:19:00,320 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:19:00,358 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 20:19:00,533 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,SelfDestructingSolverStorable113 [2021-08-06 20:19:00,533 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:19:00,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:19:00,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1271430689, now seen corresponding path program 113 times [2021-08-06 20:19:00,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:19:00,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523148714] [2021-08-06 20:19:00,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:19:00,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:19:00,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:19:01,063 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 40.1 percent of original size [2021-08-06 20:19:01,068 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 40.1 percent of original size [2021-08-06 20:19:01,160 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 75.0 percent of original size [2021-08-06 20:19:01,162 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 75.0 percent of original size [2021-08-06 20:19:01,195 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 77.1 percent of original size [2021-08-06 20:19:01,197 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 77.1 percent of original size [2021-08-06 20:19:01,236 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 30, result has 48.3 percent of original size [2021-08-06 20:19:01,238 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 30, result has 48.3 percent of original size [2021-08-06 20:19:01,276 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 30, result has 43.4 percent of original size [2021-08-06 20:19:01,278 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 30, result has 43.4 percent of original size [2021-08-06 20:19:01,312 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 69.2 percent of original size [2021-08-06 20:19:01,314 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 69.2 percent of original size [2021-08-06 20:19:01,342 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 29.4 percent of original size [2021-08-06 20:19:01,342 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 29.4 percent of original size [2021-08-06 20:19:01,364 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:19:01,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:19:01,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523148714] [2021-08-06 20:19:01,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523148714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:19:01,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087346130] [2021-08-06 20:19:01,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:19:01,365 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:19:01,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:19:01,365 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 20:19:01,368 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 20:19:07,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 20:19:07,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:19:07,707 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 68 conjunts are in the unsatisfiable core [2021-08-06 20:19:07,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:19:08,186 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 58.6 percent of original size [2021-08-06 20:19:08,188 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 58.6 percent of original size [2021-08-06 20:19:08,365 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 60.7 percent of original size [2021-08-06 20:19:08,368 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 60.7 percent of original size [2021-08-06 20:19:08,445 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 60.7 percent of original size [2021-08-06 20:19:08,448 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 60.7 percent of original size [2021-08-06 20:19:08,524 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 60.7 percent of original size [2021-08-06 20:19:08,527 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 60.7 percent of original size [2021-08-06 20:19:08,643 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 60.7 percent of original size [2021-08-06 20:19:08,646 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 60.7 percent of original size [2021-08-06 20:19:08,728 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 60.7 percent of original size [2021-08-06 20:19:08,730 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 60.7 percent of original size [2021-08-06 20:19:08,847 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 56.3 percent of original size [2021-08-06 20:19:08,851 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 56.3 percent of original size [2021-08-06 20:19:09,066 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 58.6 percent of original size [2021-08-06 20:19:09,069 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 58.6 percent of original size [2021-08-06 20:19:09,246 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:19:09,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087346130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:19:09,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:19:09,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 43 [2021-08-06 20:19:09,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080833484] [2021-08-06 20:19:09,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-06 20:19:09,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:19:09,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-06 20:19:09,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1754, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 20:19:09,248 INFO L87 Difference]: Start difference. First operand 1231 states and 2107 transitions. Second operand has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:19:10,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:19:10,346 INFO L93 Difference]: Finished difference Result 1264 states and 2153 transitions. [2021-08-06 20:19:10,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 20:19:10,346 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 20:19:10,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:19:10,347 INFO L225 Difference]: With dead ends: 1264 [2021-08-06 20:19:10,347 INFO L226 Difference]: Without dead ends: 1254 [2021-08-06 20:19:10,348 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 1448.0ms TimeCoverageRelationStatistics Valid=221, Invalid=3201, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 20:19:10,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2021-08-06 20:19:10,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 1234. [2021-08-06 20:19:10,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1233 states have (on average 1.7128953771289537) internal successors, (2112), 1233 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:19:10,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 2112 transitions. [2021-08-06 20:19:10,357 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 2112 transitions. Word has length 45 [2021-08-06 20:19:10,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:19:10,357 INFO L470 AbstractCegarLoop]: Abstraction has 1234 states and 2112 transitions. [2021-08-06 20:19:10,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:19:10,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 2112 transitions. [2021-08-06 20:19:10,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:19:10,358 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:19:10,358 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:19:10,393 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 20:19:10,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:19:10,561 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:19:10,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:19:10,561 INFO L82 PathProgramCache]: Analyzing trace with hash 2005592543, now seen corresponding path program 114 times [2021-08-06 20:19:10,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:19:10,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30811396] [2021-08-06 20:19:10,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:19:10,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:19:10,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:19:10,801 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 33.6 percent of original size [2021-08-06 20:19:10,804 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 33.6 percent of original size [2021-08-06 20:19:10,921 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 48.8 percent of original size [2021-08-06 20:19:10,922 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 48.8 percent of original size [2021-08-06 20:19:10,949 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 55.1 percent of original size [2021-08-06 20:19:10,951 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 55.1 percent of original size [2021-08-06 20:19:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:19:11,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:19:11,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30811396] [2021-08-06 20:19:11,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30811396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:19:11,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049346234] [2021-08-06 20:19:11,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:19:11,049 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:19:11,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:19:11,050 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 20:19:11,050 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 20:19:17,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 20:19:17,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:19:17,513 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-06 20:19:17,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:19:17,908 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:19:17,910 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:19:18,039 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:19:18,042 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:19:18,100 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:19:18,102 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:19:18,159 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:19:18,162 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:19:18,237 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:19:18,239 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:19:18,298 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:19:18,300 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:19:18,360 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 45.1 percent of original size [2021-08-06 20:19:18,362 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 45.1 percent of original size [2021-08-06 20:19:18,798 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:19:18,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049346234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:19:18,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:19:18,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-06 20:19:18,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040911336] [2021-08-06 20:19:18,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 20:19:18,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:19:18,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 20:19:18,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1645, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:19:18,799 INFO L87 Difference]: Start difference. First operand 1234 states and 2112 transitions. Second operand has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:19:23,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:19:23,028 INFO L93 Difference]: Finished difference Result 1609 states and 2695 transitions. [2021-08-06 20:19:23,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-08-06 20:19:23,028 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 20:19:23,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:19:23,030 INFO L225 Difference]: With dead ends: 1609 [2021-08-06 20:19:23,030 INFO L226 Difference]: Without dead ends: 1597 [2021-08-06 20:19:23,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3493 ImplicationChecksByTransitivity, 3693.6ms TimeCoverageRelationStatistics Valid=943, Invalid=10399, Unknown=0, NotChecked=0, Total=11342 [2021-08-06 20:19:23,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2021-08-06 20:19:23,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1283. [2021-08-06 20:19:23,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 1.7082683307332294) internal successors, (2190), 1282 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:19:23,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 2190 transitions. [2021-08-06 20:19:23,043 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 2190 transitions. Word has length 45 [2021-08-06 20:19:23,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:19:23,043 INFO L470 AbstractCegarLoop]: Abstraction has 1283 states and 2190 transitions. [2021-08-06 20:19:23,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:19:23,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 2190 transitions. [2021-08-06 20:19:23,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:19:23,044 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:19:23,045 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:19:23,085 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 20:19:23,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:19:23,269 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:19:23,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:19:23,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1629774365, now seen corresponding path program 115 times [2021-08-06 20:19:23,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:19:23,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178517255] [2021-08-06 20:19:23,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:19:23,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:19:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:19:23,655 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 86, result has 33.3 percent of original size [2021-08-06 20:19:23,659 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 86, result has 33.3 percent of original size [2021-08-06 20:19:23,818 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 55.1 percent of original size [2021-08-06 20:19:23,820 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 55.1 percent of original size [2021-08-06 20:19:23,856 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 50.0 percent of original size [2021-08-06 20:19:23,857 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 50.0 percent of original size [2021-08-06 20:19:23,939 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:19:23,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:19:23,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178517255] [2021-08-06 20:19:23,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178517255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:19:23,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518826528] [2021-08-06 20:19:23,940 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:19:23,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:19:23,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:19:23,940 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 20:19:23,992 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 20:19:31,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:19:31,602 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-06 20:19:31,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:19:32,675 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:19:32,677 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:19:32,863 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:19:32,865 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:19:32,925 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:19:32,927 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:19:32,985 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:19:32,987 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:19:33,045 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:19:33,047 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:19:33,105 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:19:33,108 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 20:19:33,218 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 48.1 percent of original size [2021-08-06 20:19:33,221 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 48.1 percent of original size [2021-08-06 20:19:33,633 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:19:33,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518826528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:19:33,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:19:33,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 42 [2021-08-06 20:19:33,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713761439] [2021-08-06 20:19:33,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 20:19:33,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:19:33,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 20:19:33,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1658, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:19:33,641 INFO L87 Difference]: Start difference. First operand 1283 states and 2190 transitions. Second operand has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:19:38,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:19:38,573 INFO L93 Difference]: Finished difference Result 1417 states and 2368 transitions. [2021-08-06 20:19:38,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-08-06 20:19:38,573 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 20:19:38,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:19:38,575 INFO L225 Difference]: With dead ends: 1417 [2021-08-06 20:19:38,575 INFO L226 Difference]: Without dead ends: 1397 [2021-08-06 20:19:38,576 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2842 ImplicationChecksByTransitivity, 3862.5ms TimeCoverageRelationStatistics Valid=603, Invalid=8709, Unknown=0, NotChecked=0, Total=9312 [2021-08-06 20:19:38,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-08-06 20:19:38,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1256. [2021-08-06 20:19:38,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 1255 states have (on average 1.7107569721115539) internal successors, (2147), 1255 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:19:38,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 2147 transitions. [2021-08-06 20:19:38,586 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 2147 transitions. Word has length 45 [2021-08-06 20:19:38,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:19:38,587 INFO L470 AbstractCegarLoop]: Abstraction has 1256 states and 2147 transitions. [2021-08-06 20:19:38,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:19:38,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 2147 transitions. [2021-08-06 20:19:38,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:19:38,588 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:19:38,588 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:19:38,626 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 20:19:38,800 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,SelfDestructingSolverStorable116 [2021-08-06 20:19:38,801 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:19:38,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:19:38,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1146017907, now seen corresponding path program 116 times [2021-08-06 20:19:38,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:19:38,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879287564] [2021-08-06 20:19:38,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:19:38,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:19:38,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:19:38,899 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 33.1 percent of original size [2021-08-06 20:19:38,903 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 33.1 percent of original size [2021-08-06 20:19:38,950 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 83.9 percent of original size [2021-08-06 20:19:38,951 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 83.9 percent of original size [2021-08-06 20:19:38,971 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 20:19:38,972 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 20:19:38,992 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.3 percent of original size [2021-08-06 20:19:38,994 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.3 percent of original size [2021-08-06 20:19:39,014 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.3 percent of original size [2021-08-06 20:19:39,015 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.3 percent of original size [2021-08-06 20:19:39,035 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.3 percent of original size [2021-08-06 20:19:39,037 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.3 percent of original size [2021-08-06 20:19:39,059 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 89.3 percent of original size [2021-08-06 20:19:39,060 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 89.3 percent of original size [2021-08-06 20:19:39,082 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 89.3 percent of original size [2021-08-06 20:19:39,084 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 89.3 percent of original size [2021-08-06 20:19:39,107 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 89.3 percent of original size [2021-08-06 20:19:39,109 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 89.3 percent of original size [2021-08-06 20:19:39,141 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 89.3 percent of original size [2021-08-06 20:19:39,143 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 89.3 percent of original size [2021-08-06 20:19:39,181 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 89.3 percent of original size [2021-08-06 20:19:39,183 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 89.3 percent of original size [2021-08-06 20:19:39,211 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 60.0 percent of original size [2021-08-06 20:19:39,213 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 60.0 percent of original size [2021-08-06 20:19:39,242 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 57.9 percent of original size [2021-08-06 20:19:39,243 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 57.9 percent of original size [2021-08-06 20:19:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:19:39,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:19:39,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879287564] [2021-08-06 20:19:39,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879287564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:19:39,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005501741] [2021-08-06 20:19:39,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:19:39,344 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:19:39,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:19:39,345 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 20:19:39,346 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 20:19:46,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:19:46,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:19:46,018 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-06 20:19:46,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:19:46,254 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:19:46,256 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:19:46,301 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:19:46,303 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 50.0 percent of original size [2021-08-06 20:19:46,350 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 41.7 percent of original size [2021-08-06 20:19:46,353 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 41.7 percent of original size [2021-08-06 20:19:47,903 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:19:47,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005501741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:19:47,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:19:47,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 43 [2021-08-06 20:19:47,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983954548] [2021-08-06 20:19:47,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-06 20:19:47,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:19:47,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-06 20:19:47,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1753, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 20:19:47,904 INFO L87 Difference]: Start difference. First operand 1256 states and 2147 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:01,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:01,214 INFO L93 Difference]: Finished difference Result 2328 states and 3834 transitions. [2021-08-06 20:20:01,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2021-08-06 20:20:01,214 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 20:20:01,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:01,216 INFO L225 Difference]: With dead ends: 2328 [2021-08-06 20:20:01,216 INFO L226 Difference]: Without dead ends: 2316 [2021-08-06 20:20:01,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16335 ImplicationChecksByTransitivity, 12012.8ms TimeCoverageRelationStatistics Valid=4339, Invalid=39551, Unknown=0, NotChecked=0, Total=43890 [2021-08-06 20:20:01,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-08-06 20:20:01,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 1376. [2021-08-06 20:20:01,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1375 states have (on average 1.7156363636363636) internal successors, (2359), 1375 states have internal predecessors, (2359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:01,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 2359 transitions. [2021-08-06 20:20:01,231 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 2359 transitions. Word has length 45 [2021-08-06 20:20:01,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:01,231 INFO L470 AbstractCegarLoop]: Abstraction has 1376 states and 2359 transitions. [2021-08-06 20:20:01,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:01,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 2359 transitions. [2021-08-06 20:20:01,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:20:01,232 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:01,232 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:20:01,269 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 20:20:01,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:01,432 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:20:01,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:01,433 INFO L82 PathProgramCache]: Analyzing trace with hash 453717427, now seen corresponding path program 117 times [2021-08-06 20:20:01,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:01,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515859043] [2021-08-06 20:20:01,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:01,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:01,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:01,585 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 100, result has 37.9 percent of original size [2021-08-06 20:20:01,590 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 100, result has 37.9 percent of original size [2021-08-06 20:20:01,629 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 87.9 percent of original size [2021-08-06 20:20:01,631 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 87.9 percent of original size [2021-08-06 20:20:01,654 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 88.2 percent of original size [2021-08-06 20:20:01,655 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 88.2 percent of original size [2021-08-06 20:20:01,679 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 82.9 percent of original size [2021-08-06 20:20:01,680 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 82.9 percent of original size [2021-08-06 20:20:01,703 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 86.7 percent of original size [2021-08-06 20:20:01,704 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 86.7 percent of original size [2021-08-06 20:20:01,730 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 86.7 percent of original size [2021-08-06 20:20:01,731 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 86.7 percent of original size [2021-08-06 20:20:01,755 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 87.1 percent of original size [2021-08-06 20:20:01,757 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 87.1 percent of original size [2021-08-06 20:20:01,779 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 87.5 percent of original size [2021-08-06 20:20:01,781 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 87.5 percent of original size [2021-08-06 20:20:01,805 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 86.2 percent of original size [2021-08-06 20:20:01,806 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 86.2 percent of original size [2021-08-06 20:20:01,834 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 85.7 percent of original size [2021-08-06 20:20:01,836 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 85.7 percent of original size [2021-08-06 20:20:01,890 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 82.5 percent of original size [2021-08-06 20:20:01,892 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 82.5 percent of original size [2021-08-06 20:20:01,927 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 81.6 percent of original size [2021-08-06 20:20:01,932 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 81.6 percent of original size [2021-08-06 20:20:02,099 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:02,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:02,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515859043] [2021-08-06 20:20:02,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515859043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:02,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494287017] [2021-08-06 20:20:02,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:20:02,099 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:02,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:02,100 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 20:20:02,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process Received shutdown request... [2021-08-06 20:20:04,710 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 20:20:04,711 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 20:20:05,739 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 20:20:05,743 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 20:20:05,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2021-08-06 20:20:05,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:05,939 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 46 with TraceHistMax 8,while executing Executor. [2021-08-06 20:20:05,941 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 20:20:05,941 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 20:20:05,944 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 20:20:05,944 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 20:20:05,945 INFO L202 PluginConnector]: Adding new model nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 08:20:05 BasicIcfg [2021-08-06 20:20:05,945 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 20:20:05,945 INFO L168 Benchmark]: Toolchain (without parser) took 923734.71 ms. Allocated memory was 161.5 MB in the beginning and 1.7 GB in the end (delta: 1.6 GB). Free memory was 140.9 MB in the beginning and 850.9 MB in the end (delta: -710.0 MB). Peak memory consumption was 1.5 GB. Max. memory is 8.0 GB. [2021-08-06 20:20:05,945 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.40 ms. Allocated memory is still 161.5 MB. Free memory is still 142.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 20:20:05,946 INFO L168 Benchmark]: Boogie Procedure Inliner took 65.17 ms. Allocated memory is still 161.5 MB. Free memory was 140.8 MB in the beginning and 139.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-08-06 20:20:05,946 INFO L168 Benchmark]: Boogie Preprocessor took 25.86 ms. Allocated memory is still 161.5 MB. Free memory was 139.3 MB in the beginning and 138.4 MB in the end (delta: 947.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 20:20:05,946 INFO L168 Benchmark]: RCFGBuilder took 366.90 ms. Allocated memory is still 161.5 MB. Free memory was 138.4 MB in the beginning and 126.9 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-08-06 20:20:05,946 INFO L168 Benchmark]: TraceAbstraction took 923255.78 ms. Allocated memory was 161.5 MB in the beginning and 1.7 GB in the end (delta: 1.6 GB). Free memory was 126.4 MB in the beginning and 850.9 MB in the end (delta: -724.4 MB). Peak memory consumption was 1.5 GB. Max. memory is 8.0 GB. [2021-08-06 20:20:05,946 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.40 ms. Allocated memory is still 161.5 MB. Free memory is still 142.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 65.17 ms. Allocated memory is still 161.5 MB. Free memory was 140.8 MB in the beginning and 139.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.86 ms. Allocated memory is still 161.5 MB. Free memory was 139.3 MB in the beginning and 138.4 MB in the end (delta: 947.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 366.90 ms. Allocated memory is still 161.5 MB. Free memory was 138.4 MB in the beginning and 126.9 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 923255.78 ms. Allocated memory was 161.5 MB in the beginning and 1.7 GB in the end (delta: 1.6 GB). Free memory was 126.4 MB in the beginning and 850.9 MB in the end (delta: -724.4 MB). Peak memory consumption was 1.5 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 30, positive: 23, positive conditional: 23, positive unconditional: 0, negative: 7, negative conditional: 7, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 24, positive: 23, positive conditional: 0, positive unconditional: 23, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 24, positive: 23, positive conditional: 0, positive unconditional: 23, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 24, positive: 23, positive conditional: 0, positive unconditional: 23, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 30, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 30, negative conditional: 0, negative unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 24, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 24, unknown conditional: 0, unknown unconditional: 24] , Statistics on independence cache: Total cache size (in pairs): 24, Positive cache size: 23, Positive conditional cache size: 0, Positive unconditional cache size: 23, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Independence queries for same thread: 6 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 46 with TraceHistMax 8,while executing Executor. - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 46 with TraceHistMax 8,while executing Executor. - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 46 with TraceHistMax 8,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 923140.1ms, OverallIterations: 119, TraceHistogramMax: 8, EmptinessCheckTime: 127.2ms, AutomataDifference: 336117.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 128.9ms, PartialOrderReductionTime: 103.9ms, HoareTripleCheckerStatistics: 4383 SDtfs, 24191 SDslu, 64410 SDs, 0 SdLazy, 154969 SolverSat, 7281 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 67176.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12886 GetRequests, 2330 SyntacticMatches, 127 SemanticMatches, 10429 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360679 ImplicationChecksByTransitivity, 328501.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1376occurred in iteration=118, InterpolantAutomatonStates: 8356, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 999.8ms AutomataMinimizationTime, 118 MinimizatonAttempts, 20697 StatesRemovedByMinimization, 118 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 387.4ms SsaConstructionTime, 2764.5ms SatisfiabilityAnalysisTime, 186345.0ms InterpolantComputationTime, 8384 NumberOfCodeBlocks, 8384 NumberOfCodeBlocksAsserted, 560 NumberOfCheckSat, 8150 ConstructedInterpolants, 0 QuantifiedInterpolants, 114712 SizeOfPredicates, 550 NumberOfNonLiveVariables, 9338 ConjunctsInSsa, 5641 ConjunctsInUnsatCore, 234 InterpolantComputations, 2 PerfectInterpolantSequences, 1863/14333 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown