/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 11:59:32,068 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 11:59:32,070 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 11:59:32,096 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 11:59:32,248 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-21 11:59:32,272 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 11:59:32,272 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 11:59:32,273 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 11:59:32,273 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 11:59:32,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 11:59:32,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 11:59:32,275 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 11:59:32,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 11:59:32,275 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 11:59:32,275 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 11:59:32,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 11:59:32,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 11:59:32,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 11:59:32,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 11:59:32,276 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 11:59:32,277 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 11:59:32,277 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 11:59:32,277 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 11:59:32,277 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 11:59:32,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 11:59:32,277 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 11:59:32,277 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 11:59:32,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 11:59:32,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 11:59:32,277 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 11:59:32,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 11:59:32,278 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 11:59:32,278 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 11:59:32,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 11:59:32,278 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 11:59:32,278 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 11:59:32,278 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 11:59:32,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 11:59:32,583 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 11:59:32,585 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 11:59:32,586 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 11:59:32,587 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 11:59:32,587 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-2.wvr.bpl [2021-08-21 11:59:32,587 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-2.wvr.bpl' [2021-08-21 11:59:32,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 11:59:32,628 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 11:59:32,630 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 11:59:32,630 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 11:59:32,631 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 11:59:32,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:59:32" (1/1) ... [2021-08-21 11:59:32,654 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:59:32" (1/1) ... [2021-08-21 11:59:32,667 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 11:59:32,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 11:59:32,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 11:59:32,669 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 11:59:32,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:59:32" (1/1) ... [2021-08-21 11:59:32,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:59:32" (1/1) ... [2021-08-21 11:59:32,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:59:32" (1/1) ... [2021-08-21 11:59:32,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:59:32" (1/1) ... [2021-08-21 11:59:32,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:59:32" (1/1) ... [2021-08-21 11:59:32,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:59:32" (1/1) ... [2021-08-21 11:59:32,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:59:32" (1/1) ... [2021-08-21 11:59:32,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 11:59:32,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 11:59:32,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 11:59:32,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 11:59:32,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:59:32" (1/1) ... [2021-08-21 11:59:32,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 11:59:32,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:32,744 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 11:59:32,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 11:59:32,806 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 11:59:32,807 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 11:59:32,807 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 11:59:32,807 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 11:59:32,807 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 11:59:32,807 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 11:59:32,807 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 11:59:32,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 11:59:32,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 11:59:32,808 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 11:59:33,084 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 11:59:33,084 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-21 11:59:33,084 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-08-21 11:59:33,085 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-08-21 11:59:33,094 INFO L202 PluginConnector]: Adding new model unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:59:33 BoogieIcfgContainer [2021-08-21 11:59:33,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 11:59:33,095 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 11:59:33,095 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 11:59:33,097 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 11:59:33,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:59:32" (1/2) ... [2021-08-21 11:59:33,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e589975 and model type unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:59:33, skipping insertion in model container [2021-08-21 11:59:33,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:59:33" (2/2) ... [2021-08-21 11:59:33,098 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.bpl [2021-08-21 11:59:33,101 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 11:59:33,102 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 11:59:33,102 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 11:59:33,102 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 11:59:33,148 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-21 11:59:33,173 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 11:59:33,177 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 11:59:33,178 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 11:59:33,183 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-08-21 11:59:33,190 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:33,192 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:33,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-21 11:59:33,195 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:33,195 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:33,196 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:33,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:33,199 INFO L82 PathProgramCache]: Analyzing trace with hash 119764290, now seen corresponding path program 1 times [2021-08-21 11:59:33,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:33,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397101141] [2021-08-21 11:59:33,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:33,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:33,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:33,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:33,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397101141] [2021-08-21 11:59:33,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397101141] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:33,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:33,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 11:59:33,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242814238] [2021-08-21 11:59:33,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 11:59:33,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:33,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 11:59:33,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 11:59:33,313 INFO L87 Difference]: Start difference. First operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:33,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:33,327 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2021-08-21 11:59:33,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 11:59:33,329 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-08-21 11:59:33,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:33,340 INFO L225 Difference]: With dead ends: 22 [2021-08-21 11:59:33,340 INFO L226 Difference]: Without dead ends: 19 [2021-08-21 11:59:33,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 11:59:33,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-21 11:59:33,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-08-21 11:59:33,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:33,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2021-08-21 11:59:33,360 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2021-08-21 11:59:33,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:33,361 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2021-08-21 11:59:33,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:33,361 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-08-21 11:59:33,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-21 11:59:33,361 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:33,361 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:33,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 11:59:33,362 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:33,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:33,362 INFO L82 PathProgramCache]: Analyzing trace with hash -559196125, now seen corresponding path program 1 times [2021-08-21 11:59:33,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:33,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443475108] [2021-08-21 11:59:33,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:33,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:33,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:33,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:33,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443475108] [2021-08-21 11:59:33,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443475108] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:33,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:33,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 11:59:33,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804761830] [2021-08-21 11:59:33,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 11:59:33,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:33,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 11:59:33,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 11:59:33,395 INFO L87 Difference]: Start difference. First operand 19 states and 33 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:33,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:33,420 INFO L93 Difference]: Finished difference Result 19 states and 30 transitions. [2021-08-21 11:59:33,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 11:59:33,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-21 11:59:33,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:33,421 INFO L225 Difference]: With dead ends: 19 [2021-08-21 11:59:33,421 INFO L226 Difference]: Without dead ends: 15 [2021-08-21 11:59:33,421 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 11:59:33,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-21 11:59:33,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-08-21 11:59:33,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:33,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 25 transitions. [2021-08-21 11:59:33,424 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 25 transitions. Word has length 10 [2021-08-21 11:59:33,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:33,424 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 25 transitions. [2021-08-21 11:59:33,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:33,424 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 25 transitions. [2021-08-21 11:59:33,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-21 11:59:33,424 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:33,424 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:33,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 11:59:33,425 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:33,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:33,425 INFO L82 PathProgramCache]: Analyzing trace with hash -619427657, now seen corresponding path program 1 times [2021-08-21 11:59:33,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:33,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316496882] [2021-08-21 11:59:33,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:33,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:33,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:33,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:33,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316496882] [2021-08-21 11:59:33,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316496882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:33,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915480415] [2021-08-21 11:59:33,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:33,451 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:33,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:33,452 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:33,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 11:59:33,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:33,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 11:59:33,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:33,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:33,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915480415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:33,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:33,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-08-21 11:59:33,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570130726] [2021-08-21 11:59:33,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 11:59:33,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:33,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 11:59:33,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 11:59:33,598 INFO L87 Difference]: Start difference. First operand 15 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:33,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:33,629 INFO L93 Difference]: Finished difference Result 18 states and 31 transitions. [2021-08-21 11:59:33,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 11:59:33,629 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-21 11:59:33,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:33,631 INFO L225 Difference]: With dead ends: 18 [2021-08-21 11:59:33,631 INFO L226 Difference]: Without dead ends: 18 [2021-08-21 11:59:33,631 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 11:59:33,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-21 11:59:33,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-08-21 11:59:33,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:33,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2021-08-21 11:59:33,635 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2021-08-21 11:59:33,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:33,636 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2021-08-21 11:59:33,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:33,636 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2021-08-21 11:59:33,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-21 11:59:33,637 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:33,637 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:33,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-21 11:59:33,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:33,854 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:33,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:33,855 INFO L82 PathProgramCache]: Analyzing trace with hash -585360549, now seen corresponding path program 2 times [2021-08-21 11:59:33,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:33,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960370283] [2021-08-21 11:59:33,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:33,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:33,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:33,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:33,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:33,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960370283] [2021-08-21 11:59:33,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960370283] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:33,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:33,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 11:59:33,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365840354] [2021-08-21 11:59:33,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 11:59:33,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:33,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 11:59:33,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 11:59:33,879 INFO L87 Difference]: Start difference. First operand 18 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:33,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:33,901 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2021-08-21 11:59:33,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 11:59:33,901 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-21 11:59:33,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:33,902 INFO L225 Difference]: With dead ends: 20 [2021-08-21 11:59:33,902 INFO L226 Difference]: Without dead ends: 20 [2021-08-21 11:59:33,902 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 11:59:33,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-08-21 11:59:33,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-08-21 11:59:33,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:33,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-08-21 11:59:33,905 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-08-21 11:59:33,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:33,905 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-08-21 11:59:33,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:33,905 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-08-21 11:59:33,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-21 11:59:33,905 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:33,905 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:33,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 11:59:33,906 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:33,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:33,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1999310002, now seen corresponding path program 1 times [2021-08-21 11:59:33,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:33,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946502507] [2021-08-21 11:59:33,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:33,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:33,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:33,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:33,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:33,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946502507] [2021-08-21 11:59:33,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946502507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:33,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781996355] [2021-08-21 11:59:33,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:33,939 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:33,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:33,953 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:33,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 11:59:34,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:34,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 11:59:34,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:34,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:34,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781996355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:34,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:34,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 11:59:34,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158606436] [2021-08-21 11:59:34,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 11:59:34,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:34,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 11:59:34,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 11:59:34,054 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:34,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:34,065 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2021-08-21 11:59:34,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 11:59:34,066 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-21 11:59:34,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:34,066 INFO L225 Difference]: With dead ends: 24 [2021-08-21 11:59:34,066 INFO L226 Difference]: Without dead ends: 24 [2021-08-21 11:59:34,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 11:59:34,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-21 11:59:34,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-21 11:59:34,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:34,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-08-21 11:59:34,069 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2021-08-21 11:59:34,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:34,069 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-08-21 11:59:34,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:34,069 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-08-21 11:59:34,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-21 11:59:34,070 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:34,070 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:34,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-21 11:59:34,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:34,308 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:34,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:34,308 INFO L82 PathProgramCache]: Analyzing trace with hash 601800067, now seen corresponding path program 2 times [2021-08-21 11:59:34,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:34,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674113887] [2021-08-21 11:59:34,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:34,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:34,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:34,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:34,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:34,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674113887] [2021-08-21 11:59:34,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674113887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:34,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232207636] [2021-08-21 11:59:34,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:59:34,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:34,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:34,338 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:34,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 11:59:34,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:59:34,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:34,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:59:34,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:34,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 11:59:34,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-08-21 11:59:34,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:34,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232207636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:34,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:34,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-08-21 11:59:34,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465931334] [2021-08-21 11:59:34,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:34,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:34,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:34,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:34,495 INFO L87 Difference]: Start difference. First operand 24 states and 43 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:34,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:34,527 INFO L93 Difference]: Finished difference Result 54 states and 96 transitions. [2021-08-21 11:59:34,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:59:34,528 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-21 11:59:34,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:34,528 INFO L225 Difference]: With dead ends: 54 [2021-08-21 11:59:34,528 INFO L226 Difference]: Without dead ends: 51 [2021-08-21 11:59:34,529 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:34,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-21 11:59:34,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2021-08-21 11:59:34,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.121212121212121) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:34,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 70 transitions. [2021-08-21 11:59:34,532 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 70 transitions. Word has length 12 [2021-08-21 11:59:34,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:34,532 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 70 transitions. [2021-08-21 11:59:34,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:34,533 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 70 transitions. [2021-08-21 11:59:34,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-21 11:59:34,533 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:34,533 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:34,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:34,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:34,751 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:34,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:34,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1835470653, now seen corresponding path program 3 times [2021-08-21 11:59:34,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:34,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323324960] [2021-08-21 11:59:34,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:34,752 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:34,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:34,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:34,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323324960] [2021-08-21 11:59:34,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323324960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:34,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730829862] [2021-08-21 11:59:34,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:59:34,795 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:34,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:34,809 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:34,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 11:59:34,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 11:59:34,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:34,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:59:34,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:34,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 11:59:34,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-08-21 11:59:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:34,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730829862] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:34,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:34,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-08-21 11:59:34,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568370588] [2021-08-21 11:59:34,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:34,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:34,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:34,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:34,960 INFO L87 Difference]: Start difference. First operand 34 states and 70 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:34,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:34,986 INFO L93 Difference]: Finished difference Result 61 states and 117 transitions. [2021-08-21 11:59:34,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:59:34,986 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-21 11:59:34,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:34,987 INFO L225 Difference]: With dead ends: 61 [2021-08-21 11:59:34,987 INFO L226 Difference]: Without dead ends: 58 [2021-08-21 11:59:34,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:34,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-21 11:59:34,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2021-08-21 11:59:34,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 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) [2021-08-21 11:59:34,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 87 transitions. [2021-08-21 11:59:34,991 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 87 transitions. Word has length 12 [2021-08-21 11:59:34,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:34,991 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 87 transitions. [2021-08-21 11:59:34,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:34,992 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 87 transitions. [2021-08-21 11:59:34,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-21 11:59:34,992 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:34,992 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:35,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:35,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:35,205 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:35,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:35,206 INFO L82 PathProgramCache]: Analyzing trace with hash 729645499, now seen corresponding path program 4 times [2021-08-21 11:59:35,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:35,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467035624] [2021-08-21 11:59:35,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:35,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:35,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:35,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:35,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467035624] [2021-08-21 11:59:35,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467035624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:35,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014526016] [2021-08-21 11:59:35,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:59:35,232 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:35,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:35,244 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:35,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 11:59:35,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:59:35,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:35,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:59:35,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:35,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 11:59:35,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-08-21 11:59:35,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:35,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014526016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:35,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:35,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-08-21 11:59:35,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434983744] [2021-08-21 11:59:35,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:35,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:35,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:35,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:35,394 INFO L87 Difference]: Start difference. First operand 39 states and 87 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:35,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:35,426 INFO L93 Difference]: Finished difference Result 68 states and 138 transitions. [2021-08-21 11:59:35,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:59:35,426 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-21 11:59:35,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:35,427 INFO L225 Difference]: With dead ends: 68 [2021-08-21 11:59:35,427 INFO L226 Difference]: Without dead ends: 65 [2021-08-21 11:59:35,427 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:35,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-21 11:59:35,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2021-08-21 11:59:35,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.4) internal successors, (108), 45 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:35,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 108 transitions. [2021-08-21 11:59:35,431 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 108 transitions. Word has length 12 [2021-08-21 11:59:35,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:35,431 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 108 transitions. [2021-08-21 11:59:35,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:35,431 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 108 transitions. [2021-08-21 11:59:35,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 11:59:35,432 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:35,432 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:35,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:35,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:35,649 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:35,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:35,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1499011074, now seen corresponding path program 5 times [2021-08-21 11:59:35,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:35,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393833599] [2021-08-21 11:59:35,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:35,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:35,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:35,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:35,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393833599] [2021-08-21 11:59:35,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393833599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:35,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569425413] [2021-08-21 11:59:35,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:59:35,687 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:35,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:35,687 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:35,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 11:59:35,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:59:35,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:35,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:59:35,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:35,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569425413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:35,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:35,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-21 11:59:35,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408672392] [2021-08-21 11:59:35,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:35,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:35,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:35,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:35,790 INFO L87 Difference]: Start difference. First operand 46 states and 108 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:35,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:35,862 INFO L93 Difference]: Finished difference Result 84 states and 166 transitions. [2021-08-21 11:59:35,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 11:59:35,863 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 11:59:35,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:35,863 INFO L225 Difference]: With dead ends: 84 [2021-08-21 11:59:35,863 INFO L226 Difference]: Without dead ends: 79 [2021-08-21 11:59:35,864 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:35,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-21 11:59:35,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 51. [2021-08-21 11:59:35,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.44) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:35,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 122 transitions. [2021-08-21 11:59:35,868 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 122 transitions. Word has length 13 [2021-08-21 11:59:35,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:35,868 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 122 transitions. [2021-08-21 11:59:35,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:35,868 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 122 transitions. [2021-08-21 11:59:35,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 11:59:35,869 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:35,869 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:35,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:36,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:36,085 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:36,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:36,086 INFO L82 PathProgramCache]: Analyzing trace with hash -368166418, now seen corresponding path program 6 times [2021-08-21 11:59:36,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:36,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863818813] [2021-08-21 11:59:36,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:36,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:36,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:36,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:36,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863818813] [2021-08-21 11:59:36,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863818813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:36,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267867445] [2021-08-21 11:59:36,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:59:36,123 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:36,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:36,123 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:36,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 11:59:36,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 11:59:36,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:36,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:59:36,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:36,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:36,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267867445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:36,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:36,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-21 11:59:36,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759639634] [2021-08-21 11:59:36,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:36,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:36,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:36,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:36,229 INFO L87 Difference]: Start difference. First operand 51 states and 122 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:36,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:36,289 INFO L93 Difference]: Finished difference Result 95 states and 182 transitions. [2021-08-21 11:59:36,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:59:36,304 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 11:59:36,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:36,304 INFO L225 Difference]: With dead ends: 95 [2021-08-21 11:59:36,304 INFO L226 Difference]: Without dead ends: 93 [2021-08-21 11:59:36,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:59:36,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-21 11:59:36,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 56. [2021-08-21 11:59:36,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.418181818181818) internal successors, (133), 55 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:36,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 133 transitions. [2021-08-21 11:59:36,308 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 133 transitions. Word has length 13 [2021-08-21 11:59:36,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:36,309 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 133 transitions. [2021-08-21 11:59:36,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:36,309 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 133 transitions. [2021-08-21 11:59:36,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 11:59:36,309 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:36,309 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:36,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:36,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:36,527 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:36,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:36,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1891151348, now seen corresponding path program 7 times [2021-08-21 11:59:36,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:36,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404776558] [2021-08-21 11:59:36,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:36,527 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:36,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:36,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:36,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:36,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404776558] [2021-08-21 11:59:36,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404776558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:36,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581290653] [2021-08-21 11:59:36,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:59:36,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:36,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:36,600 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:36,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 11:59:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:36,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:59:36,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:36,773 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:36,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581290653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:36,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:36,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 11:59:36,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457381145] [2021-08-21 11:59:36,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:36,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:36,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:36,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:36,775 INFO L87 Difference]: Start difference. First operand 56 states and 133 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:36,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:36,849 INFO L93 Difference]: Finished difference Result 71 states and 152 transitions. [2021-08-21 11:59:36,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:59:36,849 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 11:59:36,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:36,850 INFO L225 Difference]: With dead ends: 71 [2021-08-21 11:59:36,850 INFO L226 Difference]: Without dead ends: 70 [2021-08-21 11:59:36,850 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:59:36,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-21 11:59:36,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 57. [2021-08-21 11:59:36,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.375) internal successors, (133), 56 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:36,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 133 transitions. [2021-08-21 11:59:36,856 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 133 transitions. Word has length 13 [2021-08-21 11:59:36,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:36,856 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 133 transitions. [2021-08-21 11:59:36,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:36,857 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 133 transitions. [2021-08-21 11:59:36,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 11:59:36,859 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:36,859 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:36,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:37,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-21 11:59:37,077 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:37,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:37,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1030429776, now seen corresponding path program 8 times [2021-08-21 11:59:37,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:37,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867528600] [2021-08-21 11:59:37,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:37,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:37,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:37,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:37,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867528600] [2021-08-21 11:59:37,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867528600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:37,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601931528] [2021-08-21 11:59:37,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:59:37,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:37,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:37,158 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:37,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 11:59:37,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:59:37,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:37,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:59:37,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:37,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:37,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601931528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:37,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:37,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 11:59:37,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539472302] [2021-08-21 11:59:37,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:37,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:37,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:37,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:37,338 INFO L87 Difference]: Start difference. First operand 57 states and 133 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:37,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:37,391 INFO L93 Difference]: Finished difference Result 88 states and 173 transitions. [2021-08-21 11:59:37,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:59:37,404 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 11:59:37,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:37,405 INFO L225 Difference]: With dead ends: 88 [2021-08-21 11:59:37,405 INFO L226 Difference]: Without dead ends: 88 [2021-08-21 11:59:37,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:37,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-21 11:59:37,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 57. [2021-08-21 11:59:37,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.375) internal successors, (133), 56 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:37,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 133 transitions. [2021-08-21 11:59:37,408 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 133 transitions. Word has length 13 [2021-08-21 11:59:37,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:37,408 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 133 transitions. [2021-08-21 11:59:37,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:37,408 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 133 transitions. [2021-08-21 11:59:37,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 11:59:37,409 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:37,409 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:37,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:37,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:37,634 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:37,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:37,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1041937214, now seen corresponding path program 9 times [2021-08-21 11:59:37,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:37,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732511904] [2021-08-21 11:59:37,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:37,635 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:37,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:37,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:37,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:37,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732511904] [2021-08-21 11:59:37,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732511904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:37,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555337845] [2021-08-21 11:59:37,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:59:37,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:37,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:37,674 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:37,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 11:59:37,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 11:59:37,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:37,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:59:37,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:37,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:37,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555337845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:37,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:37,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 11:59:37,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087553961] [2021-08-21 11:59:37,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:37,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:37,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:37,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:37,788 INFO L87 Difference]: Start difference. First operand 57 states and 133 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:37,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:37,840 INFO L93 Difference]: Finished difference Result 96 states and 190 transitions. [2021-08-21 11:59:37,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:59:37,850 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 11:59:37,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:37,850 INFO L225 Difference]: With dead ends: 96 [2021-08-21 11:59:37,850 INFO L226 Difference]: Without dead ends: 94 [2021-08-21 11:59:37,850 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:59:37,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-08-21 11:59:37,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 61. [2021-08-21 11:59:37,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.45) internal successors, (147), 60 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:37,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2021-08-21 11:59:37,855 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 13 [2021-08-21 11:59:37,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:37,855 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2021-08-21 11:59:37,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:37,855 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2021-08-21 11:59:37,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 11:59:37,856 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:37,856 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:37,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:38,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 11:59:38,072 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:38,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:38,072 INFO L82 PathProgramCache]: Analyzing trace with hash -240320986, now seen corresponding path program 10 times [2021-08-21 11:59:38,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:38,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394547406] [2021-08-21 11:59:38,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:38,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:38,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:38,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:38,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394547406] [2021-08-21 11:59:38,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394547406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:38,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051316105] [2021-08-21 11:59:38,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:59:38,104 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:38,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:38,104 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:38,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 11:59:38,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:59:38,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:38,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:59:38,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:38,218 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:38,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051316105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:38,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:38,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 11:59:38,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020972705] [2021-08-21 11:59:38,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:38,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:38,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:38,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:38,219 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:38,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:38,247 INFO L93 Difference]: Finished difference Result 101 states and 207 transitions. [2021-08-21 11:59:38,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 11:59:38,247 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 11:59:38,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:38,248 INFO L225 Difference]: With dead ends: 101 [2021-08-21 11:59:38,248 INFO L226 Difference]: Without dead ends: 101 [2021-08-21 11:59:38,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:38,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-08-21 11:59:38,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 64. [2021-08-21 11:59:38,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.492063492063492) internal successors, (157), 63 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:38,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2021-08-21 11:59:38,251 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 13 [2021-08-21 11:59:38,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:38,251 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2021-08-21 11:59:38,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:38,251 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2021-08-21 11:59:38,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 11:59:38,252 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:38,252 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:38,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:38,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 11:59:38,465 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:38,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:38,465 INFO L82 PathProgramCache]: Analyzing trace with hash 673964804, now seen corresponding path program 11 times [2021-08-21 11:59:38,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:38,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075834737] [2021-08-21 11:59:38,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:38,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:38,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:38,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:38,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075834737] [2021-08-21 11:59:38,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075834737] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:38,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636697935] [2021-08-21 11:59:38,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:59:38,499 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:38,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:38,499 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:38,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 11:59:38,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 11:59:38,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:38,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:59:38,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:38,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:38,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636697935] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:38,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:38,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 11:59:38,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727774544] [2021-08-21 11:59:38,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:38,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:38,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:38,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:38,629 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:38,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:38,679 INFO L93 Difference]: Finished difference Result 101 states and 205 transitions. [2021-08-21 11:59:38,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:59:38,680 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 11:59:38,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:38,681 INFO L225 Difference]: With dead ends: 101 [2021-08-21 11:59:38,681 INFO L226 Difference]: Without dead ends: 100 [2021-08-21 11:59:38,681 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:59:38,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-21 11:59:38,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2021-08-21 11:59:38,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.4761904761904763) internal successors, (156), 63 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:38,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 156 transitions. [2021-08-21 11:59:38,683 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 156 transitions. Word has length 13 [2021-08-21 11:59:38,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:38,684 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 156 transitions. [2021-08-21 11:59:38,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:38,684 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 156 transitions. [2021-08-21 11:59:38,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 11:59:38,684 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:38,684 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:38,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:38,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 11:59:38,900 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:38,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:38,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1534686376, now seen corresponding path program 12 times [2021-08-21 11:59:38,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:38,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556815070] [2021-08-21 11:59:38,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:38,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:38,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:38,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:38,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:38,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556815070] [2021-08-21 11:59:38,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556815070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:38,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850632359] [2021-08-21 11:59:38,934 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:59:38,934 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:38,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:38,934 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:38,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 11:59:39,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 11:59:39,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:39,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:59:39,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:39,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:39,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850632359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:39,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:39,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 11:59:39,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325917674] [2021-08-21 11:59:39,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:39,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:39,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:39,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:39,059 INFO L87 Difference]: Start difference. First operand 64 states and 156 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:39,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:39,083 INFO L93 Difference]: Finished difference Result 98 states and 199 transitions. [2021-08-21 11:59:39,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:59:39,084 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 11:59:39,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:39,084 INFO L225 Difference]: With dead ends: 98 [2021-08-21 11:59:39,084 INFO L226 Difference]: Without dead ends: 98 [2021-08-21 11:59:39,084 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:39,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-21 11:59:39,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2021-08-21 11:59:39,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.4761904761904763) internal successors, (156), 63 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:39,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 156 transitions. [2021-08-21 11:59:39,087 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 156 transitions. Word has length 13 [2021-08-21 11:59:39,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:39,087 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 156 transitions. [2021-08-21 11:59:39,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:39,087 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 156 transitions. [2021-08-21 11:59:39,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 11:59:39,087 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:39,087 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:39,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:39,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 11:59:39,303 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:39,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:39,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1529271458, now seen corresponding path program 13 times [2021-08-21 11:59:39,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:39,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428002197] [2021-08-21 11:59:39,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:39,304 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:39,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:39,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:39,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428002197] [2021-08-21 11:59:39,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428002197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:39,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715098157] [2021-08-21 11:59:39,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:59:39,335 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:39,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:39,336 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:39,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 11:59:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:39,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:59:39,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:39,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:39,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715098157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:39,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:39,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-21 11:59:39,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637680354] [2021-08-21 11:59:39,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:39,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:39,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:39,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:39,463 INFO L87 Difference]: Start difference. First operand 64 states and 156 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:39,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:39,516 INFO L93 Difference]: Finished difference Result 94 states and 196 transitions. [2021-08-21 11:59:39,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:59:39,516 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 11:59:39,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:39,517 INFO L225 Difference]: With dead ends: 94 [2021-08-21 11:59:39,517 INFO L226 Difference]: Without dead ends: 92 [2021-08-21 11:59:39,517 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:59:39,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-21 11:59:39,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2021-08-21 11:59:39,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.453125) internal successors, (157), 64 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:39,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2021-08-21 11:59:39,519 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 13 [2021-08-21 11:59:39,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:39,519 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2021-08-21 11:59:39,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:39,519 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2021-08-21 11:59:39,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 11:59:39,520 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:39,520 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:39,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:39,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:39,737 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:39,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:39,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1049667612, now seen corresponding path program 14 times [2021-08-21 11:59:39,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:39,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873491302] [2021-08-21 11:59:39,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:39,738 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:39,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:39,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:39,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873491302] [2021-08-21 11:59:39,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873491302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:39,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086594196] [2021-08-21 11:59:39,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:59:39,784 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:39,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:39,785 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:39,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 11:59:39,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:59:39,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:39,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:59:39,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:39,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:39,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086594196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:39,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:39,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-21 11:59:39,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038145715] [2021-08-21 11:59:39,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:39,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:39,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:39,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:39,914 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:39,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:39,966 INFO L93 Difference]: Finished difference Result 101 states and 203 transitions. [2021-08-21 11:59:39,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:59:39,966 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 11:59:39,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:39,966 INFO L225 Difference]: With dead ends: 101 [2021-08-21 11:59:39,967 INFO L226 Difference]: Without dead ends: 101 [2021-08-21 11:59:39,967 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:39,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-08-21 11:59:39,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 65. [2021-08-21 11:59:39,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.453125) internal successors, (157), 64 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:39,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2021-08-21 11:59:39,969 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 13 [2021-08-21 11:59:39,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:39,969 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2021-08-21 11:59:39,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:39,969 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2021-08-21 11:59:39,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 11:59:39,969 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:39,969 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:39,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:40,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 11:59:40,187 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:40,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:40,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1167252170, now seen corresponding path program 15 times [2021-08-21 11:59:40,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:40,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326531770] [2021-08-21 11:59:40,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:40,187 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:40,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:40,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:40,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:40,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326531770] [2021-08-21 11:59:40,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326531770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:40,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291471754] [2021-08-21 11:59:40,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:59:40,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:40,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:40,218 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:40,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 11:59:40,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 11:59:40,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:40,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:59:40,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:40,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:40,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291471754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:40,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:40,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 11:59:40,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209695463] [2021-08-21 11:59:40,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:40,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:40,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:40,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:40,397 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:40,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:40,468 INFO L93 Difference]: Finished difference Result 103 states and 212 transitions. [2021-08-21 11:59:40,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:59:40,469 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 11:59:40,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:40,469 INFO L225 Difference]: With dead ends: 103 [2021-08-21 11:59:40,469 INFO L226 Difference]: Without dead ends: 101 [2021-08-21 11:59:40,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:59:40,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-08-21 11:59:40,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 71. [2021-08-21 11:59:40,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.5285714285714285) internal successors, (177), 70 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:40,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2021-08-21 11:59:40,472 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 13 [2021-08-21 11:59:40,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:40,472 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2021-08-21 11:59:40,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:40,472 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2021-08-21 11:59:40,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 11:59:40,472 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:40,472 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:40,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:40,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:40,688 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:40,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:40,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1968868398, now seen corresponding path program 16 times [2021-08-21 11:59:40,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:40,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548230117] [2021-08-21 11:59:40,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:40,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:40,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:40,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:40,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:40,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548230117] [2021-08-21 11:59:40,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548230117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:40,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185255534] [2021-08-21 11:59:40,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:59:40,718 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:40,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:40,719 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:40,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 11:59:40,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:59:40,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:40,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:59:40,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:40,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185255534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:40,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:40,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 11:59:40,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127448328] [2021-08-21 11:59:40,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:40,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:40,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:40,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:40,875 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:40,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:40,931 INFO L93 Difference]: Finished difference Result 124 states and 260 transitions. [2021-08-21 11:59:40,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:59:40,931 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 11:59:40,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:40,936 INFO L225 Difference]: With dead ends: 124 [2021-08-21 11:59:40,936 INFO L226 Difference]: Without dead ends: 124 [2021-08-21 11:59:40,936 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:40,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-08-21 11:59:40,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 75. [2021-08-21 11:59:40,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.5945945945945947) internal successors, (192), 74 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:40,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 192 transitions. [2021-08-21 11:59:40,939 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 192 transitions. Word has length 13 [2021-08-21 11:59:40,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:40,939 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 192 transitions. [2021-08-21 11:59:40,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:40,939 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 192 transitions. [2021-08-21 11:59:40,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 11:59:40,939 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:40,939 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:40,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:41,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:41,155 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:41,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:41,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1411813108, now seen corresponding path program 17 times [2021-08-21 11:59:41,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:41,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031020789] [2021-08-21 11:59:41,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:41,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:41,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:41,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:41,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:41,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031020789] [2021-08-21 11:59:41,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031020789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:41,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766124918] [2021-08-21 11:59:41,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:59:41,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:41,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:41,187 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:41,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 11:59:41,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 11:59:41,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:41,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:59:41,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:41,324 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:41,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766124918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:41,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:41,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 11:59:41,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516683221] [2021-08-21 11:59:41,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:41,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:41,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:41,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:41,328 INFO L87 Difference]: Start difference. First operand 75 states and 192 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:41,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:41,389 INFO L93 Difference]: Finished difference Result 114 states and 244 transitions. [2021-08-21 11:59:41,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:59:41,389 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 11:59:41,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:41,399 INFO L225 Difference]: With dead ends: 114 [2021-08-21 11:59:41,399 INFO L226 Difference]: Without dead ends: 113 [2021-08-21 11:59:41,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:59:41,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-08-21 11:59:41,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 75. [2021-08-21 11:59:41,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.581081081081081) internal successors, (191), 74 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:41,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 191 transitions. [2021-08-21 11:59:41,402 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 191 transitions. Word has length 13 [2021-08-21 11:59:41,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:41,402 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 191 transitions. [2021-08-21 11:59:41,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:41,402 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 191 transitions. [2021-08-21 11:59:41,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 11:59:41,402 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:41,403 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:41,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:41,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:41,603 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:41,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:41,604 INFO L82 PathProgramCache]: Analyzing trace with hash -551091536, now seen corresponding path program 18 times [2021-08-21 11:59:41,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:41,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225135890] [2021-08-21 11:59:41,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:41,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:41,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:41,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:41,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:41,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225135890] [2021-08-21 11:59:41,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225135890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:41,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209064962] [2021-08-21 11:59:41,634 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:59:41,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:41,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:41,641 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:41,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 11:59:41,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 11:59:41,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:41,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:59:41,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:41,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:41,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209064962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:41,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:41,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 11:59:41,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191526361] [2021-08-21 11:59:41,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:41,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:41,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:41,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:41,801 INFO L87 Difference]: Start difference. First operand 75 states and 191 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:41,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:41,826 INFO L93 Difference]: Finished difference Result 97 states and 212 transitions. [2021-08-21 11:59:41,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 11:59:41,826 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 11:59:41,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:41,827 INFO L225 Difference]: With dead ends: 97 [2021-08-21 11:59:41,827 INFO L226 Difference]: Without dead ends: 97 [2021-08-21 11:59:41,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:41,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-08-21 11:59:41,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2021-08-21 11:59:41,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5342465753424657) internal successors, (185), 73 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:41,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2021-08-21 11:59:41,829 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 13 [2021-08-21 11:59:41,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:41,829 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2021-08-21 11:59:41,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:41,829 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2021-08-21 11:59:41,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 11:59:41,829 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:41,829 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:41,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:42,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:42,046 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:42,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:42,046 INFO L82 PathProgramCache]: Analyzing trace with hash -556506454, now seen corresponding path program 19 times [2021-08-21 11:59:42,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:42,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980887737] [2021-08-21 11:59:42,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:42,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:42,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:42,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:42,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:42,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980887737] [2021-08-21 11:59:42,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980887737] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:42,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490405755] [2021-08-21 11:59:42,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:59:42,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:42,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:42,075 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:42,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 11:59:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:42,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:59:42,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:42,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:42,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490405755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:42,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:42,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-21 11:59:42,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167770411] [2021-08-21 11:59:42,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:42,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:42,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:42,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:42,236 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:42,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:42,291 INFO L93 Difference]: Finished difference Result 118 states and 244 transitions. [2021-08-21 11:59:42,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:59:42,292 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 11:59:42,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:42,292 INFO L225 Difference]: With dead ends: 118 [2021-08-21 11:59:42,292 INFO L226 Difference]: Without dead ends: 116 [2021-08-21 11:59:42,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:59:42,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-08-21 11:59:42,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 74. [2021-08-21 11:59:42,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5205479452054793) internal successors, (184), 73 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) [2021-08-21 11:59:42,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 184 transitions. [2021-08-21 11:59:42,294 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 184 transitions. Word has length 13 [2021-08-21 11:59:42,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:42,295 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 184 transitions. [2021-08-21 11:59:42,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:42,295 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 184 transitions. [2021-08-21 11:59:42,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 11:59:42,295 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:42,295 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:42,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:42,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-21 11:59:42,511 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:42,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:42,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1159521772, now seen corresponding path program 20 times [2021-08-21 11:59:42,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:42,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190713927] [2021-08-21 11:59:42,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:42,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:42,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:42,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:42,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:42,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190713927] [2021-08-21 11:59:42,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190713927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:42,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798301659] [2021-08-21 11:59:42,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:59:42,541 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:42,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:42,542 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:42,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 11:59:42,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:59:42,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:42,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:59:42,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:42,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798301659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:42,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:42,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-21 11:59:42,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061470376] [2021-08-21 11:59:42,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:42,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:42,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:42,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:42,716 INFO L87 Difference]: Start difference. First operand 74 states and 184 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:42,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:42,769 INFO L93 Difference]: Finished difference Result 100 states and 216 transitions. [2021-08-21 11:59:42,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:59:42,770 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 11:59:42,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:42,770 INFO L225 Difference]: With dead ends: 100 [2021-08-21 11:59:42,770 INFO L226 Difference]: Without dead ends: 100 [2021-08-21 11:59:42,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:42,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-21 11:59:42,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 74. [2021-08-21 11:59:42,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5205479452054793) internal successors, (184), 73 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) [2021-08-21 11:59:42,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 184 transitions. [2021-08-21 11:59:42,773 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 184 transitions. Word has length 13 [2021-08-21 11:59:42,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:42,773 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 184 transitions. [2021-08-21 11:59:42,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:42,773 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 184 transitions. [2021-08-21 11:59:42,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 11:59:42,773 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:42,773 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:42,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:42,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-21 11:59:42,990 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:42,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:42,990 INFO L82 PathProgramCache]: Analyzing trace with hash 188196044, now seen corresponding path program 21 times [2021-08-21 11:59:42,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:42,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885376225] [2021-08-21 11:59:42,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:42,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:42,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:43,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:43,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:43,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885376225] [2021-08-21 11:59:43,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885376225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:43,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427372080] [2021-08-21 11:59:43,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:59:43,029 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:43,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:43,029 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:43,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 11:59:43,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 11:59:43,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:43,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:59:43,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:43,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:43,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427372080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:43,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:43,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-21 11:59:43,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573994246] [2021-08-21 11:59:43,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:43,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:43,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:43,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:43,186 INFO L87 Difference]: Start difference. First operand 74 states and 184 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:43,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:43,233 INFO L93 Difference]: Finished difference Result 107 states and 246 transitions. [2021-08-21 11:59:43,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:59:43,234 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 11:59:43,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:43,234 INFO L225 Difference]: With dead ends: 107 [2021-08-21 11:59:43,234 INFO L226 Difference]: Without dead ends: 104 [2021-08-21 11:59:43,234 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:59:43,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-21 11:59:43,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 73. [2021-08-21 11:59:43,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.5277777777777777) internal successors, (182), 72 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:43,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 182 transitions. [2021-08-21 11:59:43,236 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 182 transitions. Word has length 13 [2021-08-21 11:59:43,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:43,236 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 182 transitions. [2021-08-21 11:59:43,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:43,236 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 182 transitions. [2021-08-21 11:59:43,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 11:59:43,237 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:43,237 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:43,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:43,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:43,453 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:43,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:43,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1646040528, now seen corresponding path program 22 times [2021-08-21 11:59:43,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:43,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393425116] [2021-08-21 11:59:43,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:43,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:43,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:43,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:43,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:43,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393425116] [2021-08-21 11:59:43,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393425116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:43,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660471574] [2021-08-21 11:59:43,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:59:43,484 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:43,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:43,499 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:43,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 11:59:43,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:59:43,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:43,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:59:43,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:43,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:43,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660471574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:43,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:43,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-21 11:59:43,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218895592] [2021-08-21 11:59:43,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:43,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:43,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:43,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:43,662 INFO L87 Difference]: Start difference. First operand 73 states and 182 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:43,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:43,729 INFO L93 Difference]: Finished difference Result 92 states and 219 transitions. [2021-08-21 11:59:43,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:59:43,729 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 11:59:43,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:43,730 INFO L225 Difference]: With dead ends: 92 [2021-08-21 11:59:43,730 INFO L226 Difference]: Without dead ends: 92 [2021-08-21 11:59:43,730 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:43,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-21 11:59:43,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 79. [2021-08-21 11:59:43,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.5384615384615383) internal successors, (198), 78 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:43,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 198 transitions. [2021-08-21 11:59:43,732 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 198 transitions. Word has length 13 [2021-08-21 11:59:43,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:43,732 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 198 transitions. [2021-08-21 11:59:43,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:43,732 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 198 transitions. [2021-08-21 11:59:43,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 11:59:43,732 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:43,732 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:43,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-08-21 11:59:43,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:43,949 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:43,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:43,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1494821111, now seen corresponding path program 23 times [2021-08-21 11:59:43,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:43,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984436749] [2021-08-21 11:59:43,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:43,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:43,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:43,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 11:59:43,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:43,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984436749] [2021-08-21 11:59:43,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984436749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:43,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771158730] [2021-08-21 11:59:43,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:59:43,981 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:43,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:43,982 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:43,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 11:59:44,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 11:59:44,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:44,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:59:44,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:44,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 11:59:44,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771158730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:44,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:44,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-21 11:59:44,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098205647] [2021-08-21 11:59:44,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:59:44,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:44,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:59:44,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:59:44,158 INFO L87 Difference]: Start difference. First operand 79 states and 198 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:44,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:44,203 INFO L93 Difference]: Finished difference Result 228 states and 582 transitions. [2021-08-21 11:59:44,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:59:44,204 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 11:59:44,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:44,205 INFO L225 Difference]: With dead ends: 228 [2021-08-21 11:59:44,205 INFO L226 Difference]: Without dead ends: 226 [2021-08-21 11:59:44,205 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:44,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-08-21 11:59:44,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 168. [2021-08-21 11:59:44,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.6347305389221556) internal successors, (440), 167 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:44,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 440 transitions. [2021-08-21 11:59:44,208 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 440 transitions. Word has length 14 [2021-08-21 11:59:44,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:44,208 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 440 transitions. [2021-08-21 11:59:44,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:44,209 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 440 transitions. [2021-08-21 11:59:44,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 11:59:44,209 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:44,209 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:44,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:44,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 11:59:44,418 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:44,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:44,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1364932258, now seen corresponding path program 24 times [2021-08-21 11:59:44,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:44,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901075165] [2021-08-21 11:59:44,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:44,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:44,483 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:44,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:44,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901075165] [2021-08-21 11:59:44,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901075165] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:44,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966414739] [2021-08-21 11:59:44,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:59:44,483 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:44,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:44,484 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:44,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 11:59:44,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 11:59:44,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:44,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 11:59:44,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:44,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 11:59:44,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-21 11:59:44,826 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:44,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966414739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:44,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:44,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-08-21 11:59:44,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136867336] [2021-08-21 11:59:44,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:59:44,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:44,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:59:44,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:44,828 INFO L87 Difference]: Start difference. First operand 168 states and 440 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:44,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:44,889 INFO L93 Difference]: Finished difference Result 248 states and 589 transitions. [2021-08-21 11:59:44,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 11:59:44,890 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 11:59:44,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:44,891 INFO L225 Difference]: With dead ends: 248 [2021-08-21 11:59:44,891 INFO L226 Difference]: Without dead ends: 245 [2021-08-21 11:59:44,891 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:44,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-08-21 11:59:44,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 196. [2021-08-21 11:59:44,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.6666666666666665) internal successors, (520), 195 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:44,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 520 transitions. [2021-08-21 11:59:44,895 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 520 transitions. Word has length 15 [2021-08-21 11:59:44,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:44,895 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 520 transitions. [2021-08-21 11:59:44,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:44,895 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 520 transitions. [2021-08-21 11:59:44,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 11:59:44,896 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:44,896 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:44,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:45,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 11:59:45,112 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:45,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:45,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1183746428, now seen corresponding path program 25 times [2021-08-21 11:59:45,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:45,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011309732] [2021-08-21 11:59:45,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:45,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:45,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:45,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:45,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011309732] [2021-08-21 11:59:45,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011309732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:45,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12070693] [2021-08-21 11:59:45,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:59:45,149 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:45,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:45,150 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:45,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 11:59:45,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:45,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 11:59:45,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:45,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 11:59:45,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-21 11:59:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:45,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12070693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:45,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:45,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-08-21 11:59:45,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946664195] [2021-08-21 11:59:45,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:59:45,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:45,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:59:45,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:45,552 INFO L87 Difference]: Start difference. First operand 196 states and 520 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:45,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:45,624 INFO L93 Difference]: Finished difference Result 296 states and 729 transitions. [2021-08-21 11:59:45,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 11:59:45,625 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 11:59:45,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:45,626 INFO L225 Difference]: With dead ends: 296 [2021-08-21 11:59:45,626 INFO L226 Difference]: Without dead ends: 292 [2021-08-21 11:59:45,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:45,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-08-21 11:59:45,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 224. [2021-08-21 11:59:45,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.789237668161435) internal successors, (622), 223 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:45,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 622 transitions. [2021-08-21 11:59:45,631 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 622 transitions. Word has length 15 [2021-08-21 11:59:45,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:45,631 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 622 transitions. [2021-08-21 11:59:45,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:45,631 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 622 transitions. [2021-08-21 11:59:45,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 11:59:45,631 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:45,631 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:45,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-21 11:59:45,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 11:59:45,848 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:45,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:45,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1780119344, now seen corresponding path program 26 times [2021-08-21 11:59:45,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:45,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972741307] [2021-08-21 11:59:45,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:45,848 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:45,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:59:45,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:45,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972741307] [2021-08-21 11:59:45,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972741307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:45,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547545365] [2021-08-21 11:59:45,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:59:45,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:45,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:45,881 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:45,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 11:59:46,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:59:46,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:46,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 11:59:46,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:46,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 11:59:46,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-21 11:59:46,202 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:46,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547545365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:46,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:46,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-08-21 11:59:46,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696957207] [2021-08-21 11:59:46,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:59:46,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:46,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:59:46,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:46,204 INFO L87 Difference]: Start difference. First operand 224 states and 622 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:46,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:46,306 INFO L93 Difference]: Finished difference Result 353 states and 901 transitions. [2021-08-21 11:59:46,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 11:59:46,307 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 11:59:46,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:46,308 INFO L225 Difference]: With dead ends: 353 [2021-08-21 11:59:46,308 INFO L226 Difference]: Without dead ends: 349 [2021-08-21 11:59:46,308 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:46,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-08-21 11:59:46,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 269. [2021-08-21 11:59:46,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.906716417910448) internal successors, (779), 268 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:46,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 779 transitions. [2021-08-21 11:59:46,315 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 779 transitions. Word has length 15 [2021-08-21 11:59:46,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:46,315 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 779 transitions. [2021-08-21 11:59:46,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:46,315 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 779 transitions. [2021-08-21 11:59:46,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 11:59:46,316 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:46,316 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:46,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-08-21 11:59:46,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:46,532 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:46,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:46,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1207156740, now seen corresponding path program 27 times [2021-08-21 11:59:46,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:46,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030058115] [2021-08-21 11:59:46,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:46,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:46,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:46,582 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:46,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:46,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030058115] [2021-08-21 11:59:46,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030058115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:46,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032162797] [2021-08-21 11:59:46,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:59:46,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:46,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:46,583 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:46,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 11:59:46,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 11:59:46,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:46,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 11:59:46,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:46,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 11:59:46,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-21 11:59:46,950 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:46,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032162797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:46,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:46,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-08-21 11:59:46,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201263455] [2021-08-21 11:59:46,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:59:46,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:46,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:59:46,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:46,951 INFO L87 Difference]: Start difference. First operand 269 states and 779 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:47,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:47,032 INFO L93 Difference]: Finished difference Result 397 states and 1046 transitions. [2021-08-21 11:59:47,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 11:59:47,032 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 11:59:47,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:47,034 INFO L225 Difference]: With dead ends: 397 [2021-08-21 11:59:47,034 INFO L226 Difference]: Without dead ends: 394 [2021-08-21 11:59:47,034 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:47,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-08-21 11:59:47,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 318. [2021-08-21 11:59:47,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.9589905362776023) internal successors, (938), 317 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:47,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 938 transitions. [2021-08-21 11:59:47,040 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 938 transitions. Word has length 15 [2021-08-21 11:59:47,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:47,040 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 938 transitions. [2021-08-21 11:59:47,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:47,040 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 938 transitions. [2021-08-21 11:59:47,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 11:59:47,041 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:47,041 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:47,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:47,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:47,257 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:47,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:47,257 INFO L82 PathProgramCache]: Analyzing trace with hash -676565168, now seen corresponding path program 28 times [2021-08-21 11:59:47,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:47,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917029195] [2021-08-21 11:59:47,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:47,258 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:47,296 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:47,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:47,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917029195] [2021-08-21 11:59:47,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917029195] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:47,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722544071] [2021-08-21 11:59:47,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:59:47,296 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:47,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:47,297 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:47,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 11:59:47,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:59:47,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:47,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 11:59:47,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:47,584 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 11:59:47,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-21 11:59:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:47,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722544071] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:47,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:47,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-08-21 11:59:47,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846999992] [2021-08-21 11:59:47,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:59:47,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:47,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:59:47,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:47,658 INFO L87 Difference]: Start difference. First operand 318 states and 938 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:47,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:47,740 INFO L93 Difference]: Finished difference Result 427 states and 1156 transitions. [2021-08-21 11:59:47,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 11:59:47,741 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 11:59:47,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:47,743 INFO L225 Difference]: With dead ends: 427 [2021-08-21 11:59:47,743 INFO L226 Difference]: Without dead ends: 424 [2021-08-21 11:59:47,743 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:47,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-08-21 11:59:47,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 357. [2021-08-21 11:59:47,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.9831460674157304) internal successors, (1062), 356 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:47,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1062 transitions. [2021-08-21 11:59:47,751 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1062 transitions. Word has length 15 [2021-08-21 11:59:47,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:47,751 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 1062 transitions. [2021-08-21 11:59:47,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:47,751 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1062 transitions. [2021-08-21 11:59:47,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:59:47,752 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:47,752 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:47,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:47,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:47,968 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:47,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:47,969 INFO L82 PathProgramCache]: Analyzing trace with hash -613694781, now seen corresponding path program 29 times [2021-08-21 11:59:47,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:47,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273597404] [2021-08-21 11:59:47,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:47,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:47,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:48,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:48,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:48,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273597404] [2021-08-21 11:59:48,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273597404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:48,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218583330] [2021-08-21 11:59:48,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:59:48,025 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:48,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:48,028 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:48,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 11:59:48,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 11:59:48,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:48,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:59:48,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:48,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:48,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218583330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:48,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:48,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 11:59:48,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341277877] [2021-08-21 11:59:48,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 11:59:48,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:48,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 11:59:48,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:48,256 INFO L87 Difference]: Start difference. First operand 357 states and 1062 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:48,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:48,387 INFO L93 Difference]: Finished difference Result 482 states and 1270 transitions. [2021-08-21 11:59:48,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 11:59:48,387 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:59:48,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:48,389 INFO L225 Difference]: With dead ends: 482 [2021-08-21 11:59:48,389 INFO L226 Difference]: Without dead ends: 475 [2021-08-21 11:59:48,390 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 85.7ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-08-21 11:59:48,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-08-21 11:59:48,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 372. [2021-08-21 11:59:48,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.9838274932614555) internal successors, (1107), 371 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:48,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1107 transitions. [2021-08-21 11:59:48,412 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1107 transitions. Word has length 16 [2021-08-21 11:59:48,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:48,412 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 1107 transitions. [2021-08-21 11:59:48,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:48,413 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1107 transitions. [2021-08-21 11:59:48,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:59:48,413 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:48,413 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:48,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:48,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-21 11:59:48,614 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:48,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:48,614 INFO L82 PathProgramCache]: Analyzing trace with hash 859673787, now seen corresponding path program 30 times [2021-08-21 11:59:48,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:48,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507328121] [2021-08-21 11:59:48,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:48,615 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:48,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:48,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:48,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507328121] [2021-08-21 11:59:48,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507328121] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:48,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195492726] [2021-08-21 11:59:48,667 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:59:48,667 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:48,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:48,668 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:48,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 11:59:48,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 11:59:48,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:48,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:59:48,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:48,898 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:48,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195492726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:48,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:48,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 11:59:48,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838434346] [2021-08-21 11:59:48,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:59:48,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:48,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:59:48,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:59:48,899 INFO L87 Difference]: Start difference. First operand 372 states and 1107 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:48,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:48,936 INFO L93 Difference]: Finished difference Result 490 states and 1284 transitions. [2021-08-21 11:59:48,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:59:48,937 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:59:48,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:48,938 INFO L225 Difference]: With dead ends: 490 [2021-08-21 11:59:48,938 INFO L226 Difference]: Without dead ends: 490 [2021-08-21 11:59:48,939 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:59:48,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-08-21 11:59:48,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 352. [2021-08-21 11:59:48,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.9458689458689458) internal successors, (1034), 351 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:48,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1034 transitions. [2021-08-21 11:59:48,945 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1034 transitions. Word has length 16 [2021-08-21 11:59:48,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:48,946 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 1034 transitions. [2021-08-21 11:59:48,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:48,946 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1034 transitions. [2021-08-21 11:59:48,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:59:48,946 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:48,946 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:48,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-21 11:59:49,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:49,160 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:49,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:49,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1981644577, now seen corresponding path program 31 times [2021-08-21 11:59:49,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:49,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731388854] [2021-08-21 11:59:49,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:49,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:49,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:49,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:49,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731388854] [2021-08-21 11:59:49,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731388854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:49,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985582082] [2021-08-21 11:59:49,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:59:49,205 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:49,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:49,205 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:49,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 11:59:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:49,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:59:49,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:49,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:49,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985582082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:49,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:49,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 11:59:49,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835835022] [2021-08-21 11:59:49,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:59:49,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:49,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:59:49,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:59:49,452 INFO L87 Difference]: Start difference. First operand 352 states and 1034 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:49,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:49,530 INFO L93 Difference]: Finished difference Result 466 states and 1205 transitions. [2021-08-21 11:59:49,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 11:59:49,531 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:59:49,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:49,532 INFO L225 Difference]: With dead ends: 466 [2021-08-21 11:59:49,532 INFO L226 Difference]: Without dead ends: 464 [2021-08-21 11:59:49,532 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:59:49,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-08-21 11:59:49,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 360. [2021-08-21 11:59:49,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.9442896935933147) internal successors, (1057), 359 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:49,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1057 transitions. [2021-08-21 11:59:49,540 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1057 transitions. Word has length 16 [2021-08-21 11:59:49,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:49,540 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 1057 transitions. [2021-08-21 11:59:49,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:49,540 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1057 transitions. [2021-08-21 11:59:49,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:59:49,541 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:49,541 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:49,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:49,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:49,757 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:49,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:49,758 INFO L82 PathProgramCache]: Analyzing trace with hash 263300871, now seen corresponding path program 32 times [2021-08-21 11:59:49,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:49,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928813649] [2021-08-21 11:59:49,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:49,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:49,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:49,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:49,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:49,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928813649] [2021-08-21 11:59:49,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928813649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:49,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954514570] [2021-08-21 11:59:49,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:59:49,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:49,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:49,802 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:49,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 11:59:49,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:59:49,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:49,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:59:49,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:50,037 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:50,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954514570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:50,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:50,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 11:59:50,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475048290] [2021-08-21 11:59:50,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:59:50,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:50,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:59:50,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:59:50,039 INFO L87 Difference]: Start difference. First operand 360 states and 1057 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:50,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:50,101 INFO L93 Difference]: Finished difference Result 501 states and 1267 transitions. [2021-08-21 11:59:50,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:59:50,101 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:59:50,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:50,103 INFO L225 Difference]: With dead ends: 501 [2021-08-21 11:59:50,103 INFO L226 Difference]: Without dead ends: 501 [2021-08-21 11:59:50,103 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:59:50,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-08-21 11:59:50,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 362. [2021-08-21 11:59:50,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.9445983379501386) internal successors, (1063), 361 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:50,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1063 transitions. [2021-08-21 11:59:50,111 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1063 transitions. Word has length 16 [2021-08-21 11:59:50,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:50,112 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 1063 transitions. [2021-08-21 11:59:50,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:50,112 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1063 transitions. [2021-08-21 11:59:50,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:59:50,112 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:50,112 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:50,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:50,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 11:59:50,329 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:50,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:50,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1973914179, now seen corresponding path program 33 times [2021-08-21 11:59:50,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:50,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554760378] [2021-08-21 11:59:50,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:50,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:50,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:50,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:50,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:50,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554760378] [2021-08-21 11:59:50,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554760378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:50,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814857116] [2021-08-21 11:59:50,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:59:50,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:50,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:50,379 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:50,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 11:59:50,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:59:50,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:50,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:59:50,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:50,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:50,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814857116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:50,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:50,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 11:59:50,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309212583] [2021-08-21 11:59:50,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:59:50,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:50,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:59:50,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:59:50,649 INFO L87 Difference]: Start difference. First operand 362 states and 1063 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:50,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:50,706 INFO L93 Difference]: Finished difference Result 535 states and 1337 transitions. [2021-08-21 11:59:50,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:59:50,706 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:59:50,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:50,708 INFO L225 Difference]: With dead ends: 535 [2021-08-21 11:59:50,708 INFO L226 Difference]: Without dead ends: 535 [2021-08-21 11:59:50,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:50,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-08-21 11:59:50,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 337. [2021-08-21 11:59:50,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.8988095238095237) internal successors, (974), 336 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:50,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 974 transitions. [2021-08-21 11:59:50,715 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 974 transitions. Word has length 16 [2021-08-21 11:59:50,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:50,716 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 974 transitions. [2021-08-21 11:59:50,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:50,716 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 974 transitions. [2021-08-21 11:59:50,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:59:50,717 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:50,717 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:50,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:50,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 11:59:50,933 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:50,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:50,934 INFO L82 PathProgramCache]: Analyzing trace with hash 673953365, now seen corresponding path program 34 times [2021-08-21 11:59:50,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:50,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780270436] [2021-08-21 11:59:50,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:50,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:50,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:50,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:50,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:50,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780270436] [2021-08-21 11:59:50,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780270436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:50,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136835814] [2021-08-21 11:59:50,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:59:50,987 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:50,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:50,987 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:51,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 11:59:51,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:59:51,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:51,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:59:51,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:51,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:51,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136835814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:51,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:51,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 11:59:51,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586797178] [2021-08-21 11:59:51,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:59:51,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:51,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:59:51,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:59:51,252 INFO L87 Difference]: Start difference. First operand 337 states and 974 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:51,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:51,329 INFO L93 Difference]: Finished difference Result 456 states and 1159 transitions. [2021-08-21 11:59:51,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 11:59:51,329 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:59:51,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:51,330 INFO L225 Difference]: With dead ends: 456 [2021-08-21 11:59:51,330 INFO L226 Difference]: Without dead ends: 454 [2021-08-21 11:59:51,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:59:51,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-08-21 11:59:51,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 348. [2021-08-21 11:59:51,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.893371757925072) internal successors, (1004), 347 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:51,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1004 transitions. [2021-08-21 11:59:51,338 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1004 transitions. Word has length 16 [2021-08-21 11:59:51,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:51,338 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 1004 transitions. [2021-08-21 11:59:51,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:51,338 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1004 transitions. [2021-08-21 11:59:51,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:59:51,339 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:51,339 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:51,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:51,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-21 11:59:51,555 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:51,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:51,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1044390341, now seen corresponding path program 35 times [2021-08-21 11:59:51,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:51,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247294427] [2021-08-21 11:59:51,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:51,555 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:51,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:51,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:51,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:51,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247294427] [2021-08-21 11:59:51,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247294427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:51,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161554721] [2021-08-21 11:59:51,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:59:51,606 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:51,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:51,606 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:51,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 11:59:51,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:59:51,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:51,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:59:51,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:51,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:51,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161554721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:51,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:51,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 11:59:51,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147076714] [2021-08-21 11:59:51,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:59:51,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:51,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:59:51,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:59:51,857 INFO L87 Difference]: Start difference. First operand 348 states and 1004 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:51,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:51,893 INFO L93 Difference]: Finished difference Result 447 states and 1123 transitions. [2021-08-21 11:59:51,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:59:51,893 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:59:51,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:51,895 INFO L225 Difference]: With dead ends: 447 [2021-08-21 11:59:51,895 INFO L226 Difference]: Without dead ends: 447 [2021-08-21 11:59:51,895 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:59:51,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-08-21 11:59:51,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 336. [2021-08-21 11:59:51,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.8656716417910446) internal successors, (960), 335 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:51,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 960 transitions. [2021-08-21 11:59:51,901 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 960 transitions. Word has length 16 [2021-08-21 11:59:51,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:51,901 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 960 transitions. [2021-08-21 11:59:51,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:51,902 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 960 transitions. [2021-08-21 11:59:51,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:59:51,902 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:51,902 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:51,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:52,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 11:59:52,119 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:52,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:52,119 INFO L82 PathProgramCache]: Analyzing trace with hash 666222967, now seen corresponding path program 36 times [2021-08-21 11:59:52,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:52,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355468709] [2021-08-21 11:59:52,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:52,119 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:52,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:52,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:52,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355468709] [2021-08-21 11:59:52,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355468709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:52,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900085989] [2021-08-21 11:59:52,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:59:52,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:52,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:52,166 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:52,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 11:59:52,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:59:52,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:52,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:59:52,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:52,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:52,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900085989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:52,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:52,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 11:59:52,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557305703] [2021-08-21 11:59:52,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:59:52,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:52,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:59:52,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:59:52,424 INFO L87 Difference]: Start difference. First operand 336 states and 960 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:52,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:52,482 INFO L93 Difference]: Finished difference Result 482 states and 1184 transitions. [2021-08-21 11:59:52,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:59:52,482 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:59:52,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:52,483 INFO L225 Difference]: With dead ends: 482 [2021-08-21 11:59:52,484 INFO L226 Difference]: Without dead ends: 482 [2021-08-21 11:59:52,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:52,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-08-21 11:59:52,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 310. [2021-08-21 11:59:52,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.822006472491909) internal successors, (872), 309 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:52,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 872 transitions. [2021-08-21 11:59:52,490 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 872 transitions. Word has length 16 [2021-08-21 11:59:52,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:52,490 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 872 transitions. [2021-08-21 11:59:52,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:52,490 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 872 transitions. [2021-08-21 11:59:52,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:59:52,490 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:52,490 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:52,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:52,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 11:59:52,707 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:52,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:52,708 INFO L82 PathProgramCache]: Analyzing trace with hash -2139339333, now seen corresponding path program 37 times [2021-08-21 11:59:52,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:52,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837529528] [2021-08-21 11:59:52,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:52,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:52,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:52,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:52,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:52,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837529528] [2021-08-21 11:59:52,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837529528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:52,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037523931] [2021-08-21 11:59:52,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:59:52,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:52,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:52,754 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:52,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 11:59:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:52,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:59:52,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:53,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:53,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037523931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:53,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:53,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 11:59:53,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281560463] [2021-08-21 11:59:53,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:59:53,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:53,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:59:53,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:59:53,006 INFO L87 Difference]: Start difference. First operand 310 states and 872 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:53,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:53,083 INFO L93 Difference]: Finished difference Result 536 states and 1380 transitions. [2021-08-21 11:59:53,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 11:59:53,084 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:59:53,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:53,085 INFO L225 Difference]: With dead ends: 536 [2021-08-21 11:59:53,085 INFO L226 Difference]: Without dead ends: 536 [2021-08-21 11:59:53,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:59:53,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-08-21 11:59:53,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 382. [2021-08-21 11:59:53,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.9448818897637796) internal successors, (1122), 381 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:53,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1122 transitions. [2021-08-21 11:59:53,092 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1122 transitions. Word has length 16 [2021-08-21 11:59:53,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:53,092 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 1122 transitions. [2021-08-21 11:59:53,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:53,092 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1122 transitions. [2021-08-21 11:59:53,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:59:53,093 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:53,093 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:53,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:53,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-08-21 11:59:53,306 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:53,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:53,306 INFO L82 PathProgramCache]: Analyzing trace with hash -991132413, now seen corresponding path program 38 times [2021-08-21 11:59:53,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:53,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706796912] [2021-08-21 11:59:53,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:53,307 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:53,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:53,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:53,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:53,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706796912] [2021-08-21 11:59:53,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706796912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:53,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566723128] [2021-08-21 11:59:53,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:59:53,345 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:53,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:53,361 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:53,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 11:59:53,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:59:53,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:53,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:59:53,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:53,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:53,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566723128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:53,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:53,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 11:59:53,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705428812] [2021-08-21 11:59:53,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:59:53,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:53,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:59:53,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:59:53,656 INFO L87 Difference]: Start difference. First operand 382 states and 1122 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:53,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:53,735 INFO L93 Difference]: Finished difference Result 493 states and 1315 transitions. [2021-08-21 11:59:53,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 11:59:53,735 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:59:53,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:53,737 INFO L225 Difference]: With dead ends: 493 [2021-08-21 11:59:53,737 INFO L226 Difference]: Without dead ends: 489 [2021-08-21 11:59:53,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:59:53,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-08-21 11:59:53,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 406. [2021-08-21 11:59:53,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.9703703703703703) internal successors, (1203), 405 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:53,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1203 transitions. [2021-08-21 11:59:53,743 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1203 transitions. Word has length 16 [2021-08-21 11:59:53,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:53,743 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1203 transitions. [2021-08-21 11:59:53,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:53,744 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1203 transitions. [2021-08-21 11:59:53,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:59:53,744 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:53,744 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:53,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-21 11:59:53,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-21 11:59:53,962 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:53,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:53,962 INFO L82 PathProgramCache]: Analyzing trace with hash -822185533, now seen corresponding path program 39 times [2021-08-21 11:59:53,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:53,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731773281] [2021-08-21 11:59:53,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:53,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:53,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:54,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:54,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731773281] [2021-08-21 11:59:54,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731773281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:54,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027037602] [2021-08-21 11:59:54,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:59:54,011 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:54,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:54,012 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:54,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 11:59:54,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 11:59:54,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:54,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:59:54,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:54,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:54,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027037602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:54,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:54,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 11:59:54,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651303899] [2021-08-21 11:59:54,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:59:54,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:54,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:59:54,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:59:54,293 INFO L87 Difference]: Start difference. First operand 406 states and 1203 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:54,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:54,382 INFO L93 Difference]: Finished difference Result 566 states and 1493 transitions. [2021-08-21 11:59:54,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 11:59:54,392 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:59:54,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:54,394 INFO L225 Difference]: With dead ends: 566 [2021-08-21 11:59:54,394 INFO L226 Difference]: Without dead ends: 566 [2021-08-21 11:59:54,394 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:59:54,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-08-21 11:59:54,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 372. [2021-08-21 11:59:54,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.91644204851752) internal successors, (1082), 371 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:54,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1082 transitions. [2021-08-21 11:59:54,401 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1082 transitions. Word has length 16 [2021-08-21 11:59:54,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:54,401 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 1082 transitions. [2021-08-21 11:59:54,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:54,401 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1082 transitions. [2021-08-21 11:59:54,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:59:54,401 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:54,401 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:54,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:54,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-21 11:59:54,619 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:54,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:54,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1209768543, now seen corresponding path program 40 times [2021-08-21 11:59:54,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:54,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732751988] [2021-08-21 11:59:54,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:54,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:54,663 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:54,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:54,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732751988] [2021-08-21 11:59:54,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732751988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:54,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722485110] [2021-08-21 11:59:54,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:59:54,663 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:54,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:54,665 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:54,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 11:59:54,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:59:54,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:54,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:59:54,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:54,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722485110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:54,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:54,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 11:59:54,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957577768] [2021-08-21 11:59:54,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:59:54,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:54,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:59:54,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:59:54,952 INFO L87 Difference]: Start difference. First operand 372 states and 1082 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:55,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:55,027 INFO L93 Difference]: Finished difference Result 471 states and 1219 transitions. [2021-08-21 11:59:55,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 11:59:55,027 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:59:55,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:55,029 INFO L225 Difference]: With dead ends: 471 [2021-08-21 11:59:55,029 INFO L226 Difference]: Without dead ends: 467 [2021-08-21 11:59:55,029 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:59:55,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-08-21 11:59:55,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 379. [2021-08-21 11:59:55,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.9153439153439153) internal successors, (1102), 378 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:55,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1102 transitions. [2021-08-21 11:59:55,036 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1102 transitions. Word has length 16 [2021-08-21 11:59:55,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:55,036 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 1102 transitions. [2021-08-21 11:59:55,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:55,036 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1102 transitions. [2021-08-21 11:59:55,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:59:55,036 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:55,037 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:55,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:55,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:55,254 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:55,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:55,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1366855047, now seen corresponding path program 41 times [2021-08-21 11:59:55,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:55,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670815737] [2021-08-21 11:59:55,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:55,255 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:55,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:55,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:55,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:55,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670815737] [2021-08-21 11:59:55,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670815737] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:55,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001248826] [2021-08-21 11:59:55,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:59:55,296 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:55,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:55,297 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:55,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 11:59:55,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:59:55,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:55,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:59:55,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:55,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001248826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:55,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:55,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 11:59:55,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428883583] [2021-08-21 11:59:55,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:59:55,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:55,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:59:55,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:59:55,603 INFO L87 Difference]: Start difference. First operand 379 states and 1102 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:55,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:55,648 INFO L93 Difference]: Finished difference Result 489 states and 1264 transitions. [2021-08-21 11:59:55,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:59:55,648 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:59:55,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:55,649 INFO L225 Difference]: With dead ends: 489 [2021-08-21 11:59:55,649 INFO L226 Difference]: Without dead ends: 489 [2021-08-21 11:59:55,650 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:55,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-08-21 11:59:55,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 380. [2021-08-21 11:59:55,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.9155672823219) internal successors, (1105), 379 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:55,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1105 transitions. [2021-08-21 11:59:55,655 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1105 transitions. Word has length 16 [2021-08-21 11:59:55,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:55,655 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 1105 transitions. [2021-08-21 11:59:55,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:55,655 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1105 transitions. [2021-08-21 11:59:55,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:59:55,656 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:55,656 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:55,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:55,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:55,873 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:55,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:55,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1217498941, now seen corresponding path program 42 times [2021-08-21 11:59:55,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:55,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470389960] [2021-08-21 11:59:55,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:55,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:55,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:55,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:55,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470389960] [2021-08-21 11:59:55,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470389960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:55,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212107483] [2021-08-21 11:59:55,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:59:55,929 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:55,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:55,930 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:55,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 11:59:56,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:59:56,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:56,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:59:56,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:56,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:56,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212107483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:56,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:56,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 11:59:56,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932265177] [2021-08-21 11:59:56,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:59:56,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:56,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:59:56,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:59:56,219 INFO L87 Difference]: Start difference. First operand 380 states and 1105 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:56,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:56,260 INFO L93 Difference]: Finished difference Result 456 states and 1186 transitions. [2021-08-21 11:59:56,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:59:56,260 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:59:56,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:56,261 INFO L225 Difference]: With dead ends: 456 [2021-08-21 11:59:56,261 INFO L226 Difference]: Without dead ends: 456 [2021-08-21 11:59:56,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:59:56,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-08-21 11:59:56,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 359. [2021-08-21 11:59:56,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.8910614525139664) internal successors, (1035), 358 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:56,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1035 transitions. [2021-08-21 11:59:56,267 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1035 transitions. Word has length 16 [2021-08-21 11:59:56,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:56,267 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 1035 transitions. [2021-08-21 11:59:56,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:56,267 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1035 transitions. [2021-08-21 11:59:56,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:59:56,268 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:56,268 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:56,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:56,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-21 11:59:56,481 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:56,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:56,482 INFO L82 PathProgramCache]: Analyzing trace with hash 271906055, now seen corresponding path program 43 times [2021-08-21 11:59:56,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:56,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150424011] [2021-08-21 11:59:56,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:56,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:56,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:56,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:56,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150424011] [2021-08-21 11:59:56,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150424011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:56,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475864122] [2021-08-21 11:59:56,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:59:56,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:56,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:56,602 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:56,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 11:59:56,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:56,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:59:56,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:56,898 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:56,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475864122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:56,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:56,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 11:59:56,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713885315] [2021-08-21 11:59:56,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 11:59:56,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:56,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 11:59:56,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:56,899 INFO L87 Difference]: Start difference. First operand 359 states and 1035 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:56,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:56,966 INFO L93 Difference]: Finished difference Result 466 states and 1194 transitions. [2021-08-21 11:59:56,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:59:56,967 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:59:56,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:56,968 INFO L225 Difference]: With dead ends: 466 [2021-08-21 11:59:56,968 INFO L226 Difference]: Without dead ends: 466 [2021-08-21 11:59:56,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:59:56,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-08-21 11:59:56,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 341. [2021-08-21 11:59:56,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.864705882352941) internal successors, (974), 340 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:56,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 974 transitions. [2021-08-21 11:59:56,973 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 974 transitions. Word has length 16 [2021-08-21 11:59:56,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:56,973 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 974 transitions. [2021-08-21 11:59:56,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:56,974 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 974 transitions. [2021-08-21 11:59:56,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:59:56,974 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:56,974 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:56,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:57,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-21 11:59:57,191 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:57,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:57,191 INFO L82 PathProgramCache]: Analyzing trace with hash -801179325, now seen corresponding path program 44 times [2021-08-21 11:59:57,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:57,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405866040] [2021-08-21 11:59:57,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:57,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:57,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:57,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:57,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405866040] [2021-08-21 11:59:57,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405866040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:57,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280301586] [2021-08-21 11:59:57,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:59:57,243 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:57,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:57,243 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:57,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 11:59:57,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:59:57,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:57,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:59:57,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:57,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280301586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:57,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:57,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 11:59:57,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412210907] [2021-08-21 11:59:57,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 11:59:57,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:57,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 11:59:57,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:57,545 INFO L87 Difference]: Start difference. First operand 341 states and 974 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:57,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:57,670 INFO L93 Difference]: Finished difference Result 533 states and 1377 transitions. [2021-08-21 11:59:57,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 11:59:57,670 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:59:57,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:57,671 INFO L225 Difference]: With dead ends: 533 [2021-08-21 11:59:57,671 INFO L226 Difference]: Without dead ends: 533 [2021-08-21 11:59:57,673 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-08-21 11:59:57,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-08-21 11:59:57,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 403. [2021-08-21 11:59:57,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.9203980099502487) internal successors, (1174), 402 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:57,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1174 transitions. [2021-08-21 11:59:57,697 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1174 transitions. Word has length 16 [2021-08-21 11:59:57,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:57,698 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 1174 transitions. [2021-08-21 11:59:57,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:57,698 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1174 transitions. [2021-08-21 11:59:57,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:59:57,699 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:57,699 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:57,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:57,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-21 11:59:57,917 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:57,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:57,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1185929723, now seen corresponding path program 45 times [2021-08-21 11:59:57,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:57,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347962857] [2021-08-21 11:59:57,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:57,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:57,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:57,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:57,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347962857] [2021-08-21 11:59:57,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347962857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:57,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653847415] [2021-08-21 11:59:57,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:59:57,971 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:57,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:57,985 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:58,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 11:59:58,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:59:58,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:58,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:59:58,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:58,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:58,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653847415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:58,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:58,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 11:59:58,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978513476] [2021-08-21 11:59:58,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:59:58,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:58,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:59:58,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:59:58,326 INFO L87 Difference]: Start difference. First operand 403 states and 1174 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:58,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:58,439 INFO L93 Difference]: Finished difference Result 489 states and 1285 transitions. [2021-08-21 11:59:58,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 11:59:58,443 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:59:58,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:58,445 INFO L225 Difference]: With dead ends: 489 [2021-08-21 11:59:58,445 INFO L226 Difference]: Without dead ends: 485 [2021-08-21 11:59:58,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-08-21 11:59:58,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-08-21 11:59:58,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 391. [2021-08-21 11:59:58,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.9) internal successors, (1131), 390 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:58,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1131 transitions. [2021-08-21 11:59:58,451 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1131 transitions. Word has length 16 [2021-08-21 11:59:58,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:58,451 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 1131 transitions. [2021-08-21 11:59:58,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:58,451 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1131 transitions. [2021-08-21 11:59:58,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:59:58,452 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:58,452 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:58,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:58,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:58,653 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:58,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:58,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1375882811, now seen corresponding path program 46 times [2021-08-21 11:59:58,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:58,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770419370] [2021-08-21 11:59:58,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:58,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:58,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:58,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:58,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:58,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770419370] [2021-08-21 11:59:58,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770419370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:58,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089915160] [2021-08-21 11:59:58,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:59:58,707 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:58,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:58,708 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:58,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 11:59:58,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:59:58,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:58,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:59:58,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:59,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:59,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089915160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:59,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:59,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 11:59:59,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208504884] [2021-08-21 11:59:59,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 11:59:59,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:59,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 11:59:59,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:59,019 INFO L87 Difference]: Start difference. First operand 391 states and 1131 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:59,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:59,127 INFO L93 Difference]: Finished difference Result 522 states and 1383 transitions. [2021-08-21 11:59:59,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 11:59:59,128 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:59:59,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:59,129 INFO L225 Difference]: With dead ends: 522 [2021-08-21 11:59:59,129 INFO L226 Difference]: Without dead ends: 522 [2021-08-21 11:59:59,129 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-08-21 11:59:59,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-08-21 11:59:59,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 386. [2021-08-21 11:59:59,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.8935064935064934) internal successors, (1114), 385 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:59,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1114 transitions. [2021-08-21 11:59:59,135 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1114 transitions. Word has length 16 [2021-08-21 11:59:59,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:59,135 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 1114 transitions. [2021-08-21 11:59:59,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:59,136 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1114 transitions. [2021-08-21 11:59:59,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:59:59,137 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:59,137 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:59,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:59,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 11:59:59,349 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:59,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:59,349 INFO L82 PathProgramCache]: Analyzing trace with hash 524394453, now seen corresponding path program 47 times [2021-08-21 11:59:59,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:59,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648777752] [2021-08-21 11:59:59,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:59,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:59,394 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:59,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:59,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648777752] [2021-08-21 11:59:59,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648777752] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:59,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672193289] [2021-08-21 11:59:59,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:59:59,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:59,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:59,396 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:59:59,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 11:59:59,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 11:59:59,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:59,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:59:59,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:59,713 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:59,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672193289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:59,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:59,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 11:59:59,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518005957] [2021-08-21 11:59:59,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:59:59,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:59,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:59:59,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:59:59,714 INFO L87 Difference]: Start difference. First operand 386 states and 1114 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:59,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:59,791 INFO L93 Difference]: Finished difference Result 454 states and 1208 transitions. [2021-08-21 11:59:59,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 11:59:59,792 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:59:59,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:59,793 INFO L225 Difference]: With dead ends: 454 [2021-08-21 11:59:59,793 INFO L226 Difference]: Without dead ends: 452 [2021-08-21 11:59:59,793 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:59:59,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-08-21 11:59:59,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 395. [2021-08-21 11:59:59,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.8984771573604062) internal successors, (1142), 394 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:59,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1142 transitions. [2021-08-21 11:59:59,799 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1142 transitions. Word has length 16 [2021-08-21 11:59:59,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:59,799 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 1142 transitions. [2021-08-21 11:59:59,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:59,799 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1142 transitions. [2021-08-21 11:59:59,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:59:59,800 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:59,800 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:59,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-21 12:00:00,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:00,017 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:00,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:00,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1193949253, now seen corresponding path program 48 times [2021-08-21 12:00:00,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:00,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253471581] [2021-08-21 12:00:00,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:00,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:00,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:00,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:00,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253471581] [2021-08-21 12:00:00,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253471581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:00,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201217123] [2021-08-21 12:00:00,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:00:00,059 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:00,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:00,060 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:00,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 12:00:00,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:00:00,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:00,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:00:00,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:00,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:00,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201217123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:00,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:00,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 12:00:00,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146385509] [2021-08-21 12:00:00,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:00:00,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:00,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:00:00,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:00:00,417 INFO L87 Difference]: Start difference. First operand 395 states and 1142 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:00,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:00,472 INFO L93 Difference]: Finished difference Result 476 states and 1251 transitions. [2021-08-21 12:00:00,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:00:00,473 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:00:00,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:00,474 INFO L225 Difference]: With dead ends: 476 [2021-08-21 12:00:00,474 INFO L226 Difference]: Without dead ends: 476 [2021-08-21 12:00:00,474 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:00:00,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-08-21 12:00:00,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 396. [2021-08-21 12:00:00,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.8936708860759492) internal successors, (1143), 395 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:00,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1143 transitions. [2021-08-21 12:00:00,480 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1143 transitions. Word has length 16 [2021-08-21 12:00:00,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:00,480 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1143 transitions. [2021-08-21 12:00:00,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:00,480 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1143 transitions. [2021-08-21 12:00:00,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:00:00,481 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:00,481 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:00,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:00,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-21 12:00:00,692 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:00,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:00,693 INFO L82 PathProgramCache]: Analyzing trace with hash 516664055, now seen corresponding path program 49 times [2021-08-21 12:00:00,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:00,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545361146] [2021-08-21 12:00:00,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:00,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:00,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:00,735 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:00,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:00,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545361146] [2021-08-21 12:00:00,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545361146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:00,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848644715] [2021-08-21 12:00:00,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:00:00,736 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:00,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:00,738 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:00,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 12:00:01,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:01,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:00:01,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:01,076 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:01,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848644715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:01,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:01,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 12:00:01,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108366307] [2021-08-21 12:00:01,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:00:01,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:01,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:00:01,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:00:01,078 INFO L87 Difference]: Start difference. First operand 396 states and 1143 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:01,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:01,141 INFO L93 Difference]: Finished difference Result 481 states and 1264 transitions. [2021-08-21 12:00:01,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:00:01,141 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:00:01,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:01,144 INFO L225 Difference]: With dead ends: 481 [2021-08-21 12:00:01,144 INFO L226 Difference]: Without dead ends: 481 [2021-08-21 12:00:01,144 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:00:01,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-08-21 12:00:01,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 397. [2021-08-21 12:00:01,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.893939393939394) internal successors, (1146), 396 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:01,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1146 transitions. [2021-08-21 12:00:01,152 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1146 transitions. Word has length 16 [2021-08-21 12:00:01,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:01,152 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 1146 transitions. [2021-08-21 12:00:01,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:01,152 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1146 transitions. [2021-08-21 12:00:01,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:00:01,153 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:01,153 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:01,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-21 12:00:01,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-21 12:00:01,369 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:01,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:01,369 INFO L82 PathProgramCache]: Analyzing trace with hash 2006069051, now seen corresponding path program 50 times [2021-08-21 12:00:01,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:01,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24127862] [2021-08-21 12:00:01,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:01,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:01,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:01,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:01,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:01,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24127862] [2021-08-21 12:00:01,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24127862] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:01,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240233310] [2021-08-21 12:00:01,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:00:01,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:01,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:01,414 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:01,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 12:00:01,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:00:01,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:01,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:00:01,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:01,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240233310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:01,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:01,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 12:00:01,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837361777] [2021-08-21 12:00:01,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:00:01,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:01,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:00:01,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:00:01,735 INFO L87 Difference]: Start difference. First operand 397 states and 1146 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:01,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:01,782 INFO L93 Difference]: Finished difference Result 471 states and 1285 transitions. [2021-08-21 12:00:01,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:00:01,782 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:00:01,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:01,783 INFO L225 Difference]: With dead ends: 471 [2021-08-21 12:00:01,784 INFO L226 Difference]: Without dead ends: 471 [2021-08-21 12:00:01,784 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:00:01,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-08-21 12:00:01,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 420. [2021-08-21 12:00:01,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.911694510739857) internal successors, (1220), 419 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:01,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1220 transitions. [2021-08-21 12:00:01,789 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1220 transitions. Word has length 16 [2021-08-21 12:00:01,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:01,789 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 1220 transitions. [2021-08-21 12:00:01,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:01,789 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1220 transitions. [2021-08-21 12:00:01,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:00:01,790 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:01,790 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:01,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:02,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:02,006 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:02,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:02,006 INFO L82 PathProgramCache]: Analyzing trace with hash 932983671, now seen corresponding path program 51 times [2021-08-21 12:00:02,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:02,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024344818] [2021-08-21 12:00:02,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:02,007 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:02,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:02,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:02,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:02,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024344818] [2021-08-21 12:00:02,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024344818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:02,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245119607] [2021-08-21 12:00:02,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:00:02,054 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:02,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:02,055 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:02,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 12:00:02,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:00:02,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:02,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:00:02,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:02,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:02,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245119607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:02,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:02,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:00:02,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046807617] [2021-08-21 12:00:02,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:00:02,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:02,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:00:02,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:02,402 INFO L87 Difference]: Start difference. First operand 420 states and 1220 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:02,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:02,483 INFO L93 Difference]: Finished difference Result 483 states and 1308 transitions. [2021-08-21 12:00:02,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:00:02,484 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:00:02,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:02,493 INFO L225 Difference]: With dead ends: 483 [2021-08-21 12:00:02,493 INFO L226 Difference]: Without dead ends: 483 [2021-08-21 12:00:02,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:00:02,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-08-21 12:00:02,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 416. [2021-08-21 12:00:02,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.908433734939759) internal successors, (1207), 415 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:02,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1207 transitions. [2021-08-21 12:00:02,499 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1207 transitions. Word has length 16 [2021-08-21 12:00:02,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:02,500 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1207 transitions. [2021-08-21 12:00:02,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:02,500 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1207 transitions. [2021-08-21 12:00:02,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:00:02,500 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:02,500 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:02,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:02,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-21 12:00:02,719 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:02,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:02,719 INFO L82 PathProgramCache]: Analyzing trace with hash 2027075259, now seen corresponding path program 52 times [2021-08-21 12:00:02,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:02,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190006137] [2021-08-21 12:00:02,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:02,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:02,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:02,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:02,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190006137] [2021-08-21 12:00:02,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190006137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:02,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767026841] [2021-08-21 12:00:02,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:00:02,772 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:02,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:02,774 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:02,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 12:00:03,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:00:03,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:03,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:00:03,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:03,126 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:03,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767026841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:03,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:03,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:00:03,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41852149] [2021-08-21 12:00:03,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:00:03,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:03,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:00:03,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:03,127 INFO L87 Difference]: Start difference. First operand 416 states and 1207 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:03,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:03,249 INFO L93 Difference]: Finished difference Result 513 states and 1403 transitions. [2021-08-21 12:00:03,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:00:03,249 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:00:03,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:03,251 INFO L225 Difference]: With dead ends: 513 [2021-08-21 12:00:03,251 INFO L226 Difference]: Without dead ends: 513 [2021-08-21 12:00:03,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 108.4ms TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:00:03,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-08-21 12:00:03,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 424. [2021-08-21 12:00:03,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 2.9125295508274234) internal successors, (1232), 423 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:03,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1232 transitions. [2021-08-21 12:00:03,256 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1232 transitions. Word has length 16 [2021-08-21 12:00:03,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:03,257 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 1232 transitions. [2021-08-21 12:00:03,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:03,257 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1232 transitions. [2021-08-21 12:00:03,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:00:03,257 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:03,257 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:03,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-21 12:00:03,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-21 12:00:03,473 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:03,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:03,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1364208962, now seen corresponding path program 53 times [2021-08-21 12:00:03,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:03,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896600850] [2021-08-21 12:00:03,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:03,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:03,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:03,527 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:03,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:03,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896600850] [2021-08-21 12:00:03,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896600850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:03,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562594266] [2021-08-21 12:00:03,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:00:03,528 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:03,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:03,528 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:03,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 12:00:03,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:00:03,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:03,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:00:03,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:03,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562594266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:03,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:03,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-08-21 12:00:03,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469418466] [2021-08-21 12:00:03,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:00:03,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:03,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:00:03,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:00:03,896 INFO L87 Difference]: Start difference. First operand 424 states and 1232 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:04,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:04,020 INFO L93 Difference]: Finished difference Result 523 states and 1364 transitions. [2021-08-21 12:00:04,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:00:04,020 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:00:04,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:04,022 INFO L225 Difference]: With dead ends: 523 [2021-08-21 12:00:04,022 INFO L226 Difference]: Without dead ends: 517 [2021-08-21 12:00:04,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 113.7ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:00:04,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-08-21 12:00:04,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 417. [2021-08-21 12:00:04,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.8774038461538463) internal successors, (1197), 416 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:04,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1197 transitions. [2021-08-21 12:00:04,027 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1197 transitions. Word has length 17 [2021-08-21 12:00:04,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:04,027 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 1197 transitions. [2021-08-21 12:00:04,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:04,027 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1197 transitions. [2021-08-21 12:00:04,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:00:04,028 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:04,028 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:04,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:04,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:04,245 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:04,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:04,245 INFO L82 PathProgramCache]: Analyzing trace with hash -11250196, now seen corresponding path program 54 times [2021-08-21 12:00:04,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:04,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502213019] [2021-08-21 12:00:04,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:04,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:04,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:04,299 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:04,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:04,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502213019] [2021-08-21 12:00:04,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502213019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:04,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873034526] [2021-08-21 12:00:04,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:00:04,299 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:04,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:04,300 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:04,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 12:00:04,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:00:04,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:04,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:04,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:04,646 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:04,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873034526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:04,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:04,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:00:04,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648031843] [2021-08-21 12:00:04,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:00:04,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:04,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:00:04,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:00:04,655 INFO L87 Difference]: Start difference. First operand 417 states and 1197 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:04,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:04,733 INFO L93 Difference]: Finished difference Result 436 states and 1230 transitions. [2021-08-21 12:00:04,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:00:04,734 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:00:04,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:04,735 INFO L225 Difference]: With dead ends: 436 [2021-08-21 12:00:04,735 INFO L226 Difference]: Without dead ends: 434 [2021-08-21 12:00:04,735 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:00:04,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-08-21 12:00:04,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 417. [2021-08-21 12:00:04,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.8677884615384617) internal successors, (1193), 416 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:04,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1193 transitions. [2021-08-21 12:00:04,755 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1193 transitions. Word has length 17 [2021-08-21 12:00:04,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:04,755 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 1193 transitions. [2021-08-21 12:00:04,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:04,755 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1193 transitions. [2021-08-21 12:00:04,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:00:04,756 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:04,756 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:04,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:04,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:04,973 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:04,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:04,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1206433444, now seen corresponding path program 55 times [2021-08-21 12:00:04,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:04,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174769925] [2021-08-21 12:00:04,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:04,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:04,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:05,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:05,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174769925] [2021-08-21 12:00:05,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174769925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:05,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705132320] [2021-08-21 12:00:05,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:00:05,018 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:05,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:05,019 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:05,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 12:00:05,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:05,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:05,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:05,314 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:00:05,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705132320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:05,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:05,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 12:00:05,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421066372] [2021-08-21 12:00:05,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:00:05,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:05,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:00:05,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:00:05,315 INFO L87 Difference]: Start difference. First operand 417 states and 1193 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:05,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:05,360 INFO L93 Difference]: Finished difference Result 505 states and 1323 transitions. [2021-08-21 12:00:05,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:00:05,360 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:00:05,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:05,362 INFO L225 Difference]: With dead ends: 505 [2021-08-21 12:00:05,362 INFO L226 Difference]: Without dead ends: 503 [2021-08-21 12:00:05,362 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:05,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-08-21 12:00:05,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 420. [2021-08-21 12:00:05,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.863961813842482) internal successors, (1200), 419 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:05,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1200 transitions. [2021-08-21 12:00:05,367 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1200 transitions. Word has length 17 [2021-08-21 12:00:05,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:05,367 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 1200 transitions. [2021-08-21 12:00:05,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:05,368 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1200 transitions. [2021-08-21 12:00:05,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:00:05,368 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:05,368 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:05,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:05,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:05,585 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:05,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:05,585 INFO L82 PathProgramCache]: Analyzing trace with hash 2120719234, now seen corresponding path program 56 times [2021-08-21 12:00:05,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:05,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59615170] [2021-08-21 12:00:05,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:05,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:05,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:05,627 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:05,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:05,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59615170] [2021-08-21 12:00:05,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59615170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:05,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527975249] [2021-08-21 12:00:05,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:00:05,627 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:05,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:05,628 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:05,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 12:00:05,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:00:05,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:05,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:00:05,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:05,996 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:00:05,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527975249] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:05,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:05,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-08-21 12:00:05,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538806386] [2021-08-21 12:00:05,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:00:05,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:05,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:00:05,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:00:05,997 INFO L87 Difference]: Start difference. First operand 420 states and 1200 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:06,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:06,051 INFO L93 Difference]: Finished difference Result 516 states and 1337 transitions. [2021-08-21 12:00:06,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:00:06,051 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:00:06,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:06,053 INFO L225 Difference]: With dead ends: 516 [2021-08-21 12:00:06,053 INFO L226 Difference]: Without dead ends: 515 [2021-08-21 12:00:06,053 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:00:06,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-08-21 12:00:06,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 415. [2021-08-21 12:00:06,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.845410628019324) internal successors, (1178), 414 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:06,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1178 transitions. [2021-08-21 12:00:06,058 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1178 transitions. Word has length 17 [2021-08-21 12:00:06,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:06,058 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 1178 transitions. [2021-08-21 12:00:06,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:06,058 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1178 transitions. [2021-08-21 12:00:06,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:00:06,059 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:06,059 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:06,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-21 12:00:06,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 12:00:06,276 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:06,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:06,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1318941408, now seen corresponding path program 57 times [2021-08-21 12:00:06,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:06,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540691081] [2021-08-21 12:00:06,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:06,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:06,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:06,319 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:06,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:06,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540691081] [2021-08-21 12:00:06,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540691081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:06,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505269263] [2021-08-21 12:00:06,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:00:06,320 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:06,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:06,321 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:06,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 12:00:06,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:00:06,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:06,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:06,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:06,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505269263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:06,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:06,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:00:06,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669013009] [2021-08-21 12:00:06,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:00:06,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:06,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:00:06,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:00:06,680 INFO L87 Difference]: Start difference. First operand 415 states and 1178 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:06,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:06,758 INFO L93 Difference]: Finished difference Result 503 states and 1301 transitions. [2021-08-21 12:00:06,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:00:06,758 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:00:06,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:06,759 INFO L225 Difference]: With dead ends: 503 [2021-08-21 12:00:06,759 INFO L226 Difference]: Without dead ends: 500 [2021-08-21 12:00:06,759 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:00:06,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-08-21 12:00:06,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 412. [2021-08-21 12:00:06,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.834549878345499) internal successors, (1165), 411 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:06,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1165 transitions. [2021-08-21 12:00:06,764 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1165 transitions. Word has length 17 [2021-08-21 12:00:06,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:06,765 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 1165 transitions. [2021-08-21 12:00:06,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:06,765 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1165 transitions. [2021-08-21 12:00:06,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:00:06,765 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:06,765 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:06,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:06,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-08-21 12:00:06,982 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:06,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:06,983 INFO L82 PathProgramCache]: Analyzing trace with hash -574238910, now seen corresponding path program 58 times [2021-08-21 12:00:06,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:06,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995145369] [2021-08-21 12:00:06,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:06,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:07,028 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:07,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:07,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995145369] [2021-08-21 12:00:07,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995145369] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:07,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293852557] [2021-08-21 12:00:07,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:00:07,029 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:07,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:07,029 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:07,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 12:00:07,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:00:07,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:07,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:00:07,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:07,400 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:07,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293852557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:07,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:07,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-08-21 12:00:07,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895926002] [2021-08-21 12:00:07,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:00:07,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:07,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:00:07,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:07,401 INFO L87 Difference]: Start difference. First operand 412 states and 1165 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:07,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:07,523 INFO L93 Difference]: Finished difference Result 478 states and 1266 transitions. [2021-08-21 12:00:07,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:00:07,523 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:00:07,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:07,524 INFO L225 Difference]: With dead ends: 478 [2021-08-21 12:00:07,524 INFO L226 Difference]: Without dead ends: 474 [2021-08-21 12:00:07,525 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:00:07,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-08-21 12:00:07,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 412. [2021-08-21 12:00:07,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.8223844282238444) internal successors, (1160), 411 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:07,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1160 transitions. [2021-08-21 12:00:07,531 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1160 transitions. Word has length 17 [2021-08-21 12:00:07,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:07,531 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 1160 transitions. [2021-08-21 12:00:07,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:07,531 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1160 transitions. [2021-08-21 12:00:07,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:00:07,532 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:07,532 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:07,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-21 12:00:07,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-21 12:00:07,741 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:07,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:07,741 INFO L82 PathProgramCache]: Analyzing trace with hash -677288464, now seen corresponding path program 59 times [2021-08-21 12:00:07,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:07,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104519047] [2021-08-21 12:00:07,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:07,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:07,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:07,785 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:07,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:07,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104519047] [2021-08-21 12:00:07,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104519047] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:07,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645894557] [2021-08-21 12:00:07,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:00:07,785 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:07,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:07,797 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:07,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 12:00:08,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:00:08,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:08,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:08,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:08,179 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:00:08,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645894557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:08,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:08,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 12:00:08,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875932909] [2021-08-21 12:00:08,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:00:08,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:08,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:00:08,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:00:08,180 INFO L87 Difference]: Start difference. First operand 412 states and 1160 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:08,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:08,216 INFO L93 Difference]: Finished difference Result 511 states and 1315 transitions. [2021-08-21 12:00:08,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:00:08,216 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:00:08,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:08,217 INFO L225 Difference]: With dead ends: 511 [2021-08-21 12:00:08,217 INFO L226 Difference]: Without dead ends: 509 [2021-08-21 12:00:08,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:00:08,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-08-21 12:00:08,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 416. [2021-08-21 12:00:08,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.824096385542169) internal successors, (1172), 415 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:08,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1172 transitions. [2021-08-21 12:00:08,222 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1172 transitions. Word has length 17 [2021-08-21 12:00:08,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:08,223 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1172 transitions. [2021-08-21 12:00:08,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:08,223 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1172 transitions. [2021-08-21 12:00:08,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:00:08,223 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:08,223 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:08,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-21 12:00:08,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:08,440 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:08,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:08,440 INFO L82 PathProgramCache]: Analyzing trace with hash 236997326, now seen corresponding path program 60 times [2021-08-21 12:00:08,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:08,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884941971] [2021-08-21 12:00:08,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:08,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:08,480 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:08,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:08,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884941971] [2021-08-21 12:00:08,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884941971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:08,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571361703] [2021-08-21 12:00:08,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:00:08,481 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:08,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:08,481 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:08,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 12:00:08,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:00:08,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:08,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:08,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:08,792 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:08,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571361703] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:08,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:08,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 12:00:08,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919110502] [2021-08-21 12:00:08,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:00:08,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:08,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:00:08,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:00:08,793 INFO L87 Difference]: Start difference. First operand 416 states and 1172 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:08,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:08,828 INFO L93 Difference]: Finished difference Result 512 states and 1307 transitions. [2021-08-21 12:00:08,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:00:08,829 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:00:08,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:08,829 INFO L225 Difference]: With dead ends: 512 [2021-08-21 12:00:08,829 INFO L226 Difference]: Without dead ends: 510 [2021-08-21 12:00:08,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:00:08,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-08-21 12:00:08,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 410. [2021-08-21 12:00:08,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.8092909535452324) internal successors, (1149), 409 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:08,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1149 transitions. [2021-08-21 12:00:08,835 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1149 transitions. Word has length 17 [2021-08-21 12:00:08,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:08,835 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1149 transitions. [2021-08-21 12:00:08,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:08,835 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1149 transitions. [2021-08-21 12:00:08,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:00:08,835 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:08,836 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:08,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:09,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:09,053 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:09,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:09,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1092303980, now seen corresponding path program 61 times [2021-08-21 12:00:09,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:09,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787595815] [2021-08-21 12:00:09,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:09,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:09,102 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:09,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:09,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787595815] [2021-08-21 12:00:09,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787595815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:09,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335715254] [2021-08-21 12:00:09,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:00:09,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:09,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:09,108 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:09,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 12:00:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:09,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:00:09,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:09,432 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:00:09,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335715254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:09,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:09,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 9 [2021-08-21 12:00:09,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606566756] [2021-08-21 12:00:09,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:00:09,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:09,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:00:09,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:00:09,433 INFO L87 Difference]: Start difference. First operand 410 states and 1149 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:09,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:09,513 INFO L93 Difference]: Finished difference Result 508 states and 1289 transitions. [2021-08-21 12:00:09,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:00:09,513 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:00:09,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:09,514 INFO L225 Difference]: With dead ends: 508 [2021-08-21 12:00:09,514 INFO L226 Difference]: Without dead ends: 505 [2021-08-21 12:00:09,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:00:09,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-08-21 12:00:09,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 404. [2021-08-21 12:00:09,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.7866004962779156) internal successors, (1123), 403 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:09,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1123 transitions. [2021-08-21 12:00:09,519 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1123 transitions. Word has length 17 [2021-08-21 12:00:09,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:09,519 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 1123 transitions. [2021-08-21 12:00:09,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:09,519 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1123 transitions. [2021-08-21 12:00:09,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:00:09,520 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:09,520 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:09,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:09,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-21 12:00:09,723 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:09,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:09,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1837006478, now seen corresponding path program 62 times [2021-08-21 12:00:09,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:09,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212721417] [2021-08-21 12:00:09,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:09,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:09,778 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:09,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:09,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212721417] [2021-08-21 12:00:09,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212721417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:09,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894351032] [2021-08-21 12:00:09,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:00:09,779 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:09,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:09,780 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:09,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 12:00:10,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:00:10,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:10,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:00:10,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:10,117 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:10,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894351032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:10,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:10,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-08-21 12:00:10,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045812579] [2021-08-21 12:00:10,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:00:10,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:10,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:00:10,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:10,117 INFO L87 Difference]: Start difference. First operand 404 states and 1123 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:10,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:10,220 INFO L93 Difference]: Finished difference Result 507 states and 1271 transitions. [2021-08-21 12:00:10,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:00:10,220 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:00:10,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:10,221 INFO L225 Difference]: With dead ends: 507 [2021-08-21 12:00:10,221 INFO L226 Difference]: Without dead ends: 503 [2021-08-21 12:00:10,221 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:00:10,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-08-21 12:00:10,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 404. [2021-08-21 12:00:10,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.7667493796526053) internal successors, (1115), 403 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:10,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1115 transitions. [2021-08-21 12:00:10,226 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1115 transitions. Word has length 17 [2021-08-21 12:00:10,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:10,226 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 1115 transitions. [2021-08-21 12:00:10,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:10,227 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1115 transitions. [2021-08-21 12:00:10,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:00:10,227 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:10,227 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:10,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-08-21 12:00:10,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-21 12:00:10,441 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:10,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:10,441 INFO L82 PathProgramCache]: Analyzing trace with hash -847019860, now seen corresponding path program 63 times [2021-08-21 12:00:10,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:10,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248700703] [2021-08-21 12:00:10,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:10,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:10,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:10,492 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:10,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:10,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248700703] [2021-08-21 12:00:10,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248700703] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:10,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754425762] [2021-08-21 12:00:10,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:00:10,493 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:10,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:10,494 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:10,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 12:00:10,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:00:10,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:10,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:10,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:10,877 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:10,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754425762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:10,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:10,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:00:10,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31438394] [2021-08-21 12:00:10,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:00:10,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:10,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:00:10,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:10,878 INFO L87 Difference]: Start difference. First operand 404 states and 1115 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:10,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:10,980 INFO L93 Difference]: Finished difference Result 493 states and 1294 transitions. [2021-08-21 12:00:10,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:00:10,980 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:00:10,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:10,981 INFO L225 Difference]: With dead ends: 493 [2021-08-21 12:00:10,981 INFO L226 Difference]: Without dead ends: 487 [2021-08-21 12:00:10,981 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:00:10,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-08-21 12:00:10,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 405. [2021-08-21 12:00:10,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.757425742574257) internal successors, (1114), 404 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:10,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1114 transitions. [2021-08-21 12:00:10,986 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1114 transitions. Word has length 17 [2021-08-21 12:00:10,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:10,986 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 1114 transitions. [2021-08-21 12:00:10,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:10,986 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1114 transitions. [2021-08-21 12:00:10,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:00:10,987 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:10,987 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:11,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:11,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:11,201 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:11,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:11,201 INFO L82 PathProgramCache]: Analyzing trace with hash -2907134, now seen corresponding path program 64 times [2021-08-21 12:00:11,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:11,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160181230] [2021-08-21 12:00:11,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:11,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:11,250 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:11,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:11,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160181230] [2021-08-21 12:00:11,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160181230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:11,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775592041] [2021-08-21 12:00:11,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:00:11,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:11,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:11,251 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:11,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 12:00:11,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:00:11,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:11,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:11,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:11,651 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:11,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775592041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:11,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:11,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:00:11,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300063256] [2021-08-21 12:00:11,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:00:11,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:11,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:00:11,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:00:11,652 INFO L87 Difference]: Start difference. First operand 405 states and 1114 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:11,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:11,708 INFO L93 Difference]: Finished difference Result 477 states and 1233 transitions. [2021-08-21 12:00:11,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:00:11,708 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:00:11,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:11,709 INFO L225 Difference]: With dead ends: 477 [2021-08-21 12:00:11,709 INFO L226 Difference]: Without dead ends: 477 [2021-08-21 12:00:11,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:00:11,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-08-21 12:00:11,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 406. [2021-08-21 12:00:11,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.758024691358025) internal successors, (1117), 405 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:11,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1117 transitions. [2021-08-21 12:00:11,714 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1117 transitions. Word has length 17 [2021-08-21 12:00:11,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:11,714 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1117 transitions. [2021-08-21 12:00:11,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:11,714 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1117 transitions. [2021-08-21 12:00:11,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:00:11,715 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:11,715 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:11,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:11,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-21 12:00:11,931 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:11,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:11,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1330042276, now seen corresponding path program 65 times [2021-08-21 12:00:11,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:11,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785908719] [2021-08-21 12:00:11,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:11,931 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:11,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:11,990 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:11,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:11,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785908719] [2021-08-21 12:00:11,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785908719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:11,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426716469] [2021-08-21 12:00:11,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:00:11,991 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:11,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:11,991 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:11,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 12:00:12,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:00:12,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:12,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:12,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:12,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426716469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:12,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:12,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:00:12,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218231908] [2021-08-21 12:00:12,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:00:12,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:12,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:00:12,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:12,435 INFO L87 Difference]: Start difference. First operand 406 states and 1117 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:12,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:12,532 INFO L93 Difference]: Finished difference Result 515 states and 1317 transitions. [2021-08-21 12:00:12,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:00:12,532 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:00:12,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:12,533 INFO L225 Difference]: With dead ends: 515 [2021-08-21 12:00:12,533 INFO L226 Difference]: Without dead ends: 509 [2021-08-21 12:00:12,533 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:00:12,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-08-21 12:00:12,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 406. [2021-08-21 12:00:12,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.745679012345679) internal successors, (1112), 405 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:12,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1112 transitions. [2021-08-21 12:00:12,538 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1112 transitions. Word has length 17 [2021-08-21 12:00:12,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:12,538 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1112 transitions. [2021-08-21 12:00:12,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:12,538 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1112 transitions. [2021-08-21 12:00:12,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:00:12,539 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:12,539 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:12,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:12,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-21 12:00:12,753 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:12,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:12,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1056874532, now seen corresponding path program 66 times [2021-08-21 12:00:12,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:12,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4358808] [2021-08-21 12:00:12,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:12,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:12,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:12,793 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:12,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:12,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4358808] [2021-08-21 12:00:12,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4358808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:12,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623290661] [2021-08-21 12:00:12,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:00:12,793 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:12,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:12,794 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:12,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 12:00:13,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:00:13,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:13,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:13,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:13,217 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:13,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623290661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:13,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:13,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 12:00:13,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404985599] [2021-08-21 12:00:13,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:00:13,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:13,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:00:13,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:00:13,218 INFO L87 Difference]: Start difference. First operand 406 states and 1112 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:13,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:13,259 INFO L93 Difference]: Finished difference Result 543 states and 1336 transitions. [2021-08-21 12:00:13,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:00:13,259 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:00:13,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:13,260 INFO L225 Difference]: With dead ends: 543 [2021-08-21 12:00:13,260 INFO L226 Difference]: Without dead ends: 543 [2021-08-21 12:00:13,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:00:13,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-08-21 12:00:13,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 412. [2021-08-21 12:00:13,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.761557177615572) internal successors, (1135), 411 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:13,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1135 transitions. [2021-08-21 12:00:13,265 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1135 transitions. Word has length 17 [2021-08-21 12:00:13,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:13,265 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 1135 transitions. [2021-08-21 12:00:13,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:13,265 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1135 transitions. [2021-08-21 12:00:13,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:00:13,266 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:13,266 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:13,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:13,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-21 12:00:13,483 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:13,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:13,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1971160322, now seen corresponding path program 67 times [2021-08-21 12:00:13,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:13,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763104595] [2021-08-21 12:00:13,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:13,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:13,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:13,523 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:13,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:13,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763104595] [2021-08-21 12:00:13,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763104595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:13,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266916591] [2021-08-21 12:00:13,524 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:00:13,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:13,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:13,524 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:13,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 12:00:13,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:13,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:00:13,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:13,941 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:00:13,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266916591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:13,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:13,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-08-21 12:00:13,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558827475] [2021-08-21 12:00:13,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:00:13,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:13,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:00:13,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:00:13,942 INFO L87 Difference]: Start difference. First operand 412 states and 1135 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:13,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:13,985 INFO L93 Difference]: Finished difference Result 518 states and 1286 transitions. [2021-08-21 12:00:13,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:00:13,985 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:00:13,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:13,986 INFO L225 Difference]: With dead ends: 518 [2021-08-21 12:00:13,986 INFO L226 Difference]: Without dead ends: 518 [2021-08-21 12:00:13,986 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:13,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-08-21 12:00:13,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 410. [2021-08-21 12:00:13,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.750611246943765) internal successors, (1125), 409 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:13,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1125 transitions. [2021-08-21 12:00:13,992 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1125 transitions. Word has length 17 [2021-08-21 12:00:13,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:13,992 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1125 transitions. [2021-08-21 12:00:13,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:13,992 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1125 transitions. [2021-08-21 12:00:13,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:00:13,992 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:13,992 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:14,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:14,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-08-21 12:00:14,194 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:14,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:14,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1468500320, now seen corresponding path program 68 times [2021-08-21 12:00:14,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:14,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150543516] [2021-08-21 12:00:14,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:14,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:14,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:14,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:14,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150543516] [2021-08-21 12:00:14,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150543516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:14,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040071229] [2021-08-21 12:00:14,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:00:14,254 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:14,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:14,255 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:14,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-21 12:00:14,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:00:14,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:14,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:00:14,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:14,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040071229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:14,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:14,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 9 [2021-08-21 12:00:14,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049298947] [2021-08-21 12:00:14,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:00:14,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:14,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:00:14,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:00:14,695 INFO L87 Difference]: Start difference. First operand 410 states and 1125 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:14,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:14,770 INFO L93 Difference]: Finished difference Result 515 states and 1275 transitions. [2021-08-21 12:00:14,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:00:14,771 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:00:14,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:14,771 INFO L225 Difference]: With dead ends: 515 [2021-08-21 12:00:14,771 INFO L226 Difference]: Without dead ends: 513 [2021-08-21 12:00:14,772 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:00:14,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-08-21 12:00:14,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 410. [2021-08-21 12:00:14,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.73838630806846) internal successors, (1120), 409 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:14,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1120 transitions. [2021-08-21 12:00:14,777 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1120 transitions. Word has length 17 [2021-08-21 12:00:14,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:14,777 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1120 transitions. [2021-08-21 12:00:14,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:14,777 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1120 transitions. [2021-08-21 12:00:14,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:00:14,778 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:14,778 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:14,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:14,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:14,994 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:14,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:14,995 INFO L82 PathProgramCache]: Analyzing trace with hash -723797822, now seen corresponding path program 69 times [2021-08-21 12:00:14,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:14,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095166099] [2021-08-21 12:00:14,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:14,995 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:15,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:15,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095166099] [2021-08-21 12:00:15,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095166099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:15,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947737816] [2021-08-21 12:00:15,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:00:15,041 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:15,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:15,057 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:15,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-21 12:00:15,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:00:15,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:15,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:15,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:15,532 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:15,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947737816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:15,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:15,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:00:15,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330781627] [2021-08-21 12:00:15,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:00:15,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:15,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:00:15,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:15,533 INFO L87 Difference]: Start difference. First operand 410 states and 1120 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:15,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:15,625 INFO L93 Difference]: Finished difference Result 520 states and 1277 transitions. [2021-08-21 12:00:15,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:00:15,625 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:00:15,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:15,626 INFO L225 Difference]: With dead ends: 520 [2021-08-21 12:00:15,626 INFO L226 Difference]: Without dead ends: 516 [2021-08-21 12:00:15,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:00:15,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-08-21 12:00:15,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 410. [2021-08-21 12:00:15,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.7237163814180927) internal successors, (1114), 409 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:15,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1114 transitions. [2021-08-21 12:00:15,632 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1114 transitions. Word has length 17 [2021-08-21 12:00:15,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:15,632 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1114 transitions. [2021-08-21 12:00:15,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:15,632 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1114 transitions. [2021-08-21 12:00:15,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:00:15,633 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:15,633 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:15,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:15,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:15,851 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:15,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:15,851 INFO L82 PathProgramCache]: Analyzing trace with hash 887143136, now seen corresponding path program 70 times [2021-08-21 12:00:15,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:15,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564399576] [2021-08-21 12:00:15,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:15,851 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:15,904 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:15,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:15,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564399576] [2021-08-21 12:00:15,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564399576] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:15,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304518252] [2021-08-21 12:00:15,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:00:15,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:15,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:15,905 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:15,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-21 12:00:16,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:00:16,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:16,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:00:16,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:16,348 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:16,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304518252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:16,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:16,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-08-21 12:00:16,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802119169] [2021-08-21 12:00:16,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:00:16,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:16,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:00:16,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:00:16,349 INFO L87 Difference]: Start difference. First operand 410 states and 1114 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:16,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:16,451 INFO L93 Difference]: Finished difference Result 525 states and 1278 transitions. [2021-08-21 12:00:16,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:00:16,452 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:00:16,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:16,452 INFO L225 Difference]: With dead ends: 525 [2021-08-21 12:00:16,452 INFO L226 Difference]: Without dead ends: 519 [2021-08-21 12:00:16,453 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:00:16,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-08-21 12:00:16,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 411. [2021-08-21 12:00:16,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.707317073170732) internal successors, (1110), 410 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:16,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1110 transitions. [2021-08-21 12:00:16,457 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1110 transitions. Word has length 17 [2021-08-21 12:00:16,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:16,458 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1110 transitions. [2021-08-21 12:00:16,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:16,458 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1110 transitions. [2021-08-21 12:00:16,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:00:16,458 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:16,458 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:16,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:16,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:16,671 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:16,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:16,671 INFO L82 PathProgramCache]: Analyzing trace with hash -713294718, now seen corresponding path program 71 times [2021-08-21 12:00:16,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:16,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076188075] [2021-08-21 12:00:16,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:16,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:16,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:16,729 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:16,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:16,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076188075] [2021-08-21 12:00:16,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076188075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:16,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622839293] [2021-08-21 12:00:16,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:00:16,730 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:16,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:16,731 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:16,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-21 12:00:17,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:00:17,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:17,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:17,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:17,180 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:17,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622839293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:17,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:17,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 12:00:17,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757145387] [2021-08-21 12:00:17,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:00:17,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:17,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:00:17,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:00:17,192 INFO L87 Difference]: Start difference. First operand 411 states and 1110 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:17,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:17,304 INFO L93 Difference]: Finished difference Result 576 states and 1455 transitions. [2021-08-21 12:00:17,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:00:17,304 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:00:17,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:17,305 INFO L225 Difference]: With dead ends: 576 [2021-08-21 12:00:17,305 INFO L226 Difference]: Without dead ends: 568 [2021-08-21 12:00:17,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 98.3ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:00:17,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-08-21 12:00:17,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 420. [2021-08-21 12:00:17,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.6873508353221958) internal successors, (1126), 419 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:17,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1126 transitions. [2021-08-21 12:00:17,323 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1126 transitions. Word has length 17 [2021-08-21 12:00:17,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:17,323 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 1126 transitions. [2021-08-21 12:00:17,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:17,323 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1126 transitions. [2021-08-21 12:00:17,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:00:17,324 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:17,324 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:17,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:17,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-08-21 12:00:17,537 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:17,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:17,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1233457654, now seen corresponding path program 72 times [2021-08-21 12:00:17,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:17,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565504881] [2021-08-21 12:00:17,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:17,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:17,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:17,609 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:17,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:17,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565504881] [2021-08-21 12:00:17,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565504881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:17,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484322241] [2021-08-21 12:00:17,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:00:17,610 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:17,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:17,610 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:17,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-21 12:00:18,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:00:18,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:18,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:00:18,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:18,088 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:18,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484322241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:18,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:18,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2021-08-21 12:00:18,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554396513] [2021-08-21 12:00:18,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:00:18,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:18,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:00:18,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:00:18,089 INFO L87 Difference]: Start difference. First operand 420 states and 1126 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:18,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:18,182 INFO L93 Difference]: Finished difference Result 565 states and 1372 transitions. [2021-08-21 12:00:18,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:00:18,182 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:00:18,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:18,183 INFO L225 Difference]: With dead ends: 565 [2021-08-21 12:00:18,183 INFO L226 Difference]: Without dead ends: 565 [2021-08-21 12:00:18,183 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 77.6ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:00:18,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-08-21 12:00:18,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 437. [2021-08-21 12:00:18,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 2.706422018348624) internal successors, (1180), 436 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:18,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1180 transitions. [2021-08-21 12:00:18,189 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1180 transitions. Word has length 17 [2021-08-21 12:00:18,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:18,189 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 1180 transitions. [2021-08-21 12:00:18,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:18,189 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1180 transitions. [2021-08-21 12:00:18,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:00:18,190 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:18,190 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:18,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:18,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:18,405 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:18,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:18,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1943845238, now seen corresponding path program 73 times [2021-08-21 12:00:18,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:18,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21015655] [2021-08-21 12:00:18,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:18,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:18,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:18,482 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:18,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:18,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21015655] [2021-08-21 12:00:18,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21015655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:18,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582038095] [2021-08-21 12:00:18,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:00:18,483 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:18,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:18,497 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:18,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-21 12:00:18,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:18,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:00:18,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:18,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582038095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:18,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:18,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-08-21 12:00:18,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544646488] [2021-08-21 12:00:18,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:00:18,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:18,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:00:18,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:00:18,995 INFO L87 Difference]: Start difference. First operand 437 states and 1180 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:19,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:19,087 INFO L93 Difference]: Finished difference Result 550 states and 1391 transitions. [2021-08-21 12:00:19,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:00:19,088 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:00:19,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:19,089 INFO L225 Difference]: With dead ends: 550 [2021-08-21 12:00:19,089 INFO L226 Difference]: Without dead ends: 542 [2021-08-21 12:00:19,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:00:19,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-08-21 12:00:19,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 437. [2021-08-21 12:00:19,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 2.7018348623853212) internal successors, (1178), 436 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:19,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1178 transitions. [2021-08-21 12:00:19,094 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1178 transitions. Word has length 17 [2021-08-21 12:00:19,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:19,095 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 1178 transitions. [2021-08-21 12:00:19,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:19,095 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1178 transitions. [2021-08-21 12:00:19,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:00:19,095 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:19,095 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:19,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:19,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:19,309 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:19,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:19,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1018647440, now seen corresponding path program 74 times [2021-08-21 12:00:19,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:19,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422747811] [2021-08-21 12:00:19,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:19,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:19,356 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:19,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:19,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422747811] [2021-08-21 12:00:19,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422747811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:19,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005815185] [2021-08-21 12:00:19,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:00:19,356 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:19,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:19,357 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:19,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-21 12:00:19,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:00:19,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:19,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:00:19,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:19,840 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:19,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005815185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:19,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:19,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2021-08-21 12:00:19,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238475520] [2021-08-21 12:00:19,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:00:19,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:19,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:00:19,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:19,841 INFO L87 Difference]: Start difference. First operand 437 states and 1178 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:19,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:19,888 INFO L93 Difference]: Finished difference Result 635 states and 1572 transitions. [2021-08-21 12:00:19,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:00:19,888 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:00:19,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:19,889 INFO L225 Difference]: With dead ends: 635 [2021-08-21 12:00:19,889 INFO L226 Difference]: Without dead ends: 635 [2021-08-21 12:00:19,889 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:00:19,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-08-21 12:00:19,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 490. [2021-08-21 12:00:19,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 2.773006134969325) internal successors, (1356), 489 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:19,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1356 transitions. [2021-08-21 12:00:19,896 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1356 transitions. Word has length 17 [2021-08-21 12:00:19,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:19,896 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 1356 transitions. [2021-08-21 12:00:19,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:19,896 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1356 transitions. [2021-08-21 12:00:19,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:00:19,897 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:19,897 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:19,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:20,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-21 12:00:20,114 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:20,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:20,114 INFO L82 PathProgramCache]: Analyzing trace with hash 750945004, now seen corresponding path program 75 times [2021-08-21 12:00:20,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:20,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742103381] [2021-08-21 12:00:20,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:20,115 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:20,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:20,161 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:20,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:20,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742103381] [2021-08-21 12:00:20,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742103381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:20,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212986127] [2021-08-21 12:00:20,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:00:20,162 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:20,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:20,163 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:20,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-21 12:00:20,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:00:20,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:20,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:00:20,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:20,612 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:00:20,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212986127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:20,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:20,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 9 [2021-08-21 12:00:20,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463956985] [2021-08-21 12:00:20,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:00:20,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:20,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:00:20,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:00:20,613 INFO L87 Difference]: Start difference. First operand 490 states and 1356 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:20,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:20,682 INFO L93 Difference]: Finished difference Result 607 states and 1531 transitions. [2021-08-21 12:00:20,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:00:20,682 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:00:20,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:20,683 INFO L225 Difference]: With dead ends: 607 [2021-08-21 12:00:20,683 INFO L226 Difference]: Without dead ends: 605 [2021-08-21 12:00:20,683 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:00:20,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-08-21 12:00:20,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 490. [2021-08-21 12:00:20,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 2.7689161554192228) internal successors, (1354), 489 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:20,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1354 transitions. [2021-08-21 12:00:20,689 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1354 transitions. Word has length 17 [2021-08-21 12:00:20,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:20,689 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 1354 transitions. [2021-08-21 12:00:20,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:20,689 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1354 transitions. [2021-08-21 12:00:20,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:00:20,690 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:20,690 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:20,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:20,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-21 12:00:20,925 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:20,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:20,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1495647502, now seen corresponding path program 76 times [2021-08-21 12:00:20,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:20,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896340247] [2021-08-21 12:00:20,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:20,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:20,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:20,967 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:20,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:20,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896340247] [2021-08-21 12:00:20,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896340247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:20,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865752271] [2021-08-21 12:00:20,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:00:20,968 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:20,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:20,969 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:20,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-21 12:00:21,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:00:21,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:21,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:00:21,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:21,447 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:21,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865752271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:21,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:21,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-08-21 12:00:21,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030873138] [2021-08-21 12:00:21,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:00:21,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:21,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:00:21,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:21,448 INFO L87 Difference]: Start difference. First operand 490 states and 1354 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:21,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:21,531 INFO L93 Difference]: Finished difference Result 613 states and 1537 transitions. [2021-08-21 12:00:21,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:00:21,532 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:00:21,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:21,533 INFO L225 Difference]: With dead ends: 613 [2021-08-21 12:00:21,533 INFO L226 Difference]: Without dead ends: 609 [2021-08-21 12:00:21,533 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:00:21,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-08-21 12:00:21,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 495. [2021-08-21 12:00:21,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 2.7712550607287447) internal successors, (1369), 494 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:21,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1369 transitions. [2021-08-21 12:00:21,539 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1369 transitions. Word has length 17 [2021-08-21 12:00:21,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:21,539 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 1369 transitions. [2021-08-21 12:00:21,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:21,539 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1369 transitions. [2021-08-21 12:00:21,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:00:21,540 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:21,540 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:21,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:21,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:21,757 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:21,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:21,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1188378836, now seen corresponding path program 77 times [2021-08-21 12:00:21,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:21,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125068812] [2021-08-21 12:00:21,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:21,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:21,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:21,807 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:21,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:21,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125068812] [2021-08-21 12:00:21,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125068812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:21,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32561581] [2021-08-21 12:00:21,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:00:21,807 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:21,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:21,808 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:21,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-21 12:00:22,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:00:22,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:22,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:00:22,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:22,284 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:00:22,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32561581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:22,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:22,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-08-21 12:00:22,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462613547] [2021-08-21 12:00:22,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:00:22,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:22,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:00:22,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:22,285 INFO L87 Difference]: Start difference. First operand 495 states and 1369 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:22,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:22,367 INFO L93 Difference]: Finished difference Result 708 states and 1820 transitions. [2021-08-21 12:00:22,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:00:22,367 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:00:22,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:22,369 INFO L225 Difference]: With dead ends: 708 [2021-08-21 12:00:22,369 INFO L226 Difference]: Without dead ends: 702 [2021-08-21 12:00:22,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:00:22,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-08-21 12:00:22,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 495. [2021-08-21 12:00:22,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 2.7672064777327936) internal successors, (1367), 494 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:22,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1367 transitions. [2021-08-21 12:00:22,376 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1367 transitions. Word has length 17 [2021-08-21 12:00:22,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:22,376 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 1367 transitions. [2021-08-21 12:00:22,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:22,376 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1367 transitions. [2021-08-21 12:00:22,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:00:22,377 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:22,377 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:22,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:22,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:22,593 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:22,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:22,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1506150606, now seen corresponding path program 78 times [2021-08-21 12:00:22,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:22,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825872346] [2021-08-21 12:00:22,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:22,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:22,648 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:22,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:22,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825872346] [2021-08-21 12:00:22,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825872346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:22,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729087034] [2021-08-21 12:00:22,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:00:22,649 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:22,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:22,650 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:22,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-21 12:00:23,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:00:23,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:23,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:23,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:23,161 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:23,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729087034] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:23,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:23,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 12:00:23,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60212531] [2021-08-21 12:00:23,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:00:23,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:23,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:00:23,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:00:23,162 INFO L87 Difference]: Start difference. First operand 495 states and 1367 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:23,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:23,295 INFO L93 Difference]: Finished difference Result 721 states and 1832 transitions. [2021-08-21 12:00:23,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:00:23,296 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:00:23,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:23,297 INFO L225 Difference]: With dead ends: 721 [2021-08-21 12:00:23,297 INFO L226 Difference]: Without dead ends: 713 [2021-08-21 12:00:23,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:00:23,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-08-21 12:00:23,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 499. [2021-08-21 12:00:23,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 2.7650602409638556) internal successors, (1377), 498 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:23,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1377 transitions. [2021-08-21 12:00:23,303 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1377 transitions. Word has length 17 [2021-08-21 12:00:23,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:23,303 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 1377 transitions. [2021-08-21 12:00:23,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:23,303 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1377 transitions. [2021-08-21 12:00:23,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:00:23,304 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:23,304 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:23,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:23,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-08-21 12:00:23,508 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:23,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:23,509 INFO L82 PathProgramCache]: Analyzing trace with hash -862782612, now seen corresponding path program 79 times [2021-08-21 12:00:23,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:23,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417049819] [2021-08-21 12:00:23,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:23,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:23,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:23,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417049819] [2021-08-21 12:00:23,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417049819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:23,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789229333] [2021-08-21 12:00:23,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:00:23,574 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:23,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:23,575 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:23,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-21 12:00:24,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:24,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:00:24,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:24,069 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:24,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789229333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:24,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:24,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-08-21 12:00:24,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548006947] [2021-08-21 12:00:24,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:00:24,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:24,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:00:24,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:00:24,070 INFO L87 Difference]: Start difference. First operand 499 states and 1377 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:24,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:24,153 INFO L93 Difference]: Finished difference Result 564 states and 1510 transitions. [2021-08-21 12:00:24,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:00:24,154 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:00:24,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:24,155 INFO L225 Difference]: With dead ends: 564 [2021-08-21 12:00:24,155 INFO L226 Difference]: Without dead ends: 559 [2021-08-21 12:00:24,155 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 94.5ms TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:00:24,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-08-21 12:00:24,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 499. [2021-08-21 12:00:24,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 2.7630522088353415) internal successors, (1376), 498 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:24,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1376 transitions. [2021-08-21 12:00:24,160 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1376 transitions. Word has length 17 [2021-08-21 12:00:24,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:24,160 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 1376 transitions. [2021-08-21 12:00:24,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:24,160 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1376 transitions. [2021-08-21 12:00:24,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:00:24,161 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:24,161 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:24,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:24,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:24,377 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:24,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:24,377 INFO L82 PathProgramCache]: Analyzing trace with hash -636116957, now seen corresponding path program 80 times [2021-08-21 12:00:24,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:24,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529757185] [2021-08-21 12:00:24,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:24,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:24,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:24,423 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:24,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:24,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529757185] [2021-08-21 12:00:24,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529757185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:24,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162089128] [2021-08-21 12:00:24,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:00:24,424 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:24,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:24,425 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:24,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-21 12:00:24,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:00:24,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:24,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:00:24,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:25,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:00:25,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-08-21 12:00:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:25,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162089128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:25,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:25,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-08-21 12:00:25,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429952853] [2021-08-21 12:00:25,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:00:25,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:25,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:00:25,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:00:25,447 INFO L87 Difference]: Start difference. First operand 499 states and 1376 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:25,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:25,563 INFO L93 Difference]: Finished difference Result 603 states and 1569 transitions. [2021-08-21 12:00:25,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:00:25,563 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:00:25,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:25,564 INFO L225 Difference]: With dead ends: 603 [2021-08-21 12:00:25,564 INFO L226 Difference]: Without dead ends: 600 [2021-08-21 12:00:25,565 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 115.0ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:00:25,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-08-21 12:00:25,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 528. [2021-08-21 12:00:25,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 2.777988614800759) internal successors, (1464), 527 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:25,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1464 transitions. [2021-08-21 12:00:25,571 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1464 transitions. Word has length 18 [2021-08-21 12:00:25,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:25,571 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 1464 transitions. [2021-08-21 12:00:25,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:25,571 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1464 transitions. [2021-08-21 12:00:25,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:00:25,572 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:25,572 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:25,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:25,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:25,789 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:25,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:25,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1951492003, now seen corresponding path program 81 times [2021-08-21 12:00:25,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:25,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318654495] [2021-08-21 12:00:25,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:25,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:25,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:25,840 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:25,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:25,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318654495] [2021-08-21 12:00:25,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318654495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:25,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119903213] [2021-08-21 12:00:25,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:00:25,841 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:25,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:25,851 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:25,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-21 12:00:26,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:00:26,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:26,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:00:26,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:26,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:00:26,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-08-21 12:00:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:26,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119903213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:26,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:26,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-08-21 12:00:26,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042156378] [2021-08-21 12:00:26,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:00:26,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:26,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:00:26,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:00:26,843 INFO L87 Difference]: Start difference. First operand 528 states and 1464 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:26,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:26,966 INFO L93 Difference]: Finished difference Result 658 states and 1717 transitions. [2021-08-21 12:00:26,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:00:26,967 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:00:26,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:26,968 INFO L225 Difference]: With dead ends: 658 [2021-08-21 12:00:26,968 INFO L226 Difference]: Without dead ends: 655 [2021-08-21 12:00:26,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 135.5ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:00:26,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-08-21 12:00:26,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 560. [2021-08-21 12:00:26,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 559 states have (on average 2.815742397137746) internal successors, (1574), 559 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:26,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 1574 transitions. [2021-08-21 12:00:26,975 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 1574 transitions. Word has length 18 [2021-08-21 12:00:26,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:26,975 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 1574 transitions. [2021-08-21 12:00:26,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:26,976 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 1574 transitions. [2021-08-21 12:00:26,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:00:26,976 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:26,976 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:27,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:27,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-08-21 12:00:27,197 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:27,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:27,197 INFO L82 PathProgramCache]: Analyzing trace with hash 2133205787, now seen corresponding path program 82 times [2021-08-21 12:00:27,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:27,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998615978] [2021-08-21 12:00:27,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:27,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:27,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:27,248 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:00:27,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:27,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998615978] [2021-08-21 12:00:27,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998615978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:27,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673538256] [2021-08-21 12:00:27,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:00:27,249 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:27,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:27,257 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:27,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-21 12:00:27,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:00:27,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:27,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:00:27,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:27,884 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:00:27,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-08-21 12:00:28,476 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:28,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673538256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:28,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:28,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-08-21 12:00:28,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150467927] [2021-08-21 12:00:28,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:00:28,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:28,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:00:28,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:00:28,479 INFO L87 Difference]: Start difference. First operand 560 states and 1574 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:28,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:28,594 INFO L93 Difference]: Finished difference Result 712 states and 1877 transitions. [2021-08-21 12:00:28,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:00:28,594 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:00:28,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:28,595 INFO L225 Difference]: With dead ends: 712 [2021-08-21 12:00:28,595 INFO L226 Difference]: Without dead ends: 709 [2021-08-21 12:00:28,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:00:28,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-08-21 12:00:28,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 599. [2021-08-21 12:00:28,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 2.862876254180602) internal successors, (1712), 598 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:28,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1712 transitions. [2021-08-21 12:00:28,605 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1712 transitions. Word has length 18 [2021-08-21 12:00:28,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:28,606 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 1712 transitions. [2021-08-21 12:00:28,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:28,606 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1712 transitions. [2021-08-21 12:00:28,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:00:28,607 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:28,607 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:28,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-08-21 12:00:28,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:28,821 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:28,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:28,821 INFO L82 PathProgramCache]: Analyzing trace with hash -823601501, now seen corresponding path program 83 times [2021-08-21 12:00:28,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:28,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43213311] [2021-08-21 12:00:28,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:28,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:28,868 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:28,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:28,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43213311] [2021-08-21 12:00:28,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43213311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:28,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677424035] [2021-08-21 12:00:28,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:00:28,870 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:28,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:28,871 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:28,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-21 12:00:29,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:00:29,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:29,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:00:29,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:29,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:00:29,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-08-21 12:00:30,059 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:30,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677424035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:30,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:30,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-08-21 12:00:30,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448304454] [2021-08-21 12:00:30,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:00:30,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:30,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:00:30,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:00:30,060 INFO L87 Difference]: Start difference. First operand 599 states and 1712 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:30,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:30,211 INFO L93 Difference]: Finished difference Result 765 states and 2050 transitions. [2021-08-21 12:00:30,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:00:30,211 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:00:30,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:30,213 INFO L225 Difference]: With dead ends: 765 [2021-08-21 12:00:30,213 INFO L226 Difference]: Without dead ends: 762 [2021-08-21 12:00:30,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 143.2ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:00:30,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-08-21 12:00:30,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 642. [2021-08-21 12:00:30,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 2.9141965678627146) internal successors, (1868), 641 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:30,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1868 transitions. [2021-08-21 12:00:30,221 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1868 transitions. Word has length 18 [2021-08-21 12:00:30,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:30,221 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 1868 transitions. [2021-08-21 12:00:30,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:30,222 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1868 transitions. [2021-08-21 12:00:30,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:00:30,222 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:30,222 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:30,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:30,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:30,440 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:30,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:30,440 INFO L82 PathProgramCache]: Analyzing trace with hash 2004653083, now seen corresponding path program 84 times [2021-08-21 12:00:30,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:30,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104340244] [2021-08-21 12:00:30,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:30,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:30,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:30,488 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:00:30,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:30,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104340244] [2021-08-21 12:00:30,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104340244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:30,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306095158] [2021-08-21 12:00:30,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:00:30,489 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:30,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:30,490 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:30,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-21 12:00:31,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:00:31,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:31,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:00:31,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:31,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:00:31,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-08-21 12:00:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:31,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306095158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:31,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:31,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-08-21 12:00:31,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968371645] [2021-08-21 12:00:31,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:00:31,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:31,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:00:31,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:00:31,926 INFO L87 Difference]: Start difference. First operand 642 states and 1868 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:32,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:32,042 INFO L93 Difference]: Finished difference Result 806 states and 2216 transitions. [2021-08-21 12:00:32,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:00:32,042 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:00:32,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:32,058 INFO L225 Difference]: With dead ends: 806 [2021-08-21 12:00:32,058 INFO L226 Difference]: Without dead ends: 803 [2021-08-21 12:00:32,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:00:32,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-08-21 12:00:32,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 697. [2021-08-21 12:00:32,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 2.9655172413793105) internal successors, (2064), 696 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:32,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 2064 transitions. [2021-08-21 12:00:32,083 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 2064 transitions. Word has length 18 [2021-08-21 12:00:32,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:32,083 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 2064 transitions. [2021-08-21 12:00:32,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:32,083 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 2064 transitions. [2021-08-21 12:00:32,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:00:32,084 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:32,084 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:32,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:32,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-21 12:00:32,302 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:32,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:32,303 INFO L82 PathProgramCache]: Analyzing trace with hash -513768029, now seen corresponding path program 85 times [2021-08-21 12:00:32,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:32,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004211093] [2021-08-21 12:00:32,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:32,303 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:32,365 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:32,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:32,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004211093] [2021-08-21 12:00:32,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004211093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:32,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750435755] [2021-08-21 12:00:32,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:00:32,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:32,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:32,381 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:32,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-21 12:00:32,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:32,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:00:32,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:33,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:00:33,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-08-21 12:00:33,811 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:33,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750435755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:33,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:33,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-08-21 12:00:33,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943049528] [2021-08-21 12:00:33,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:00:33,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:33,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:00:33,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:00:33,812 INFO L87 Difference]: Start difference. First operand 697 states and 2064 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:33,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:33,953 INFO L93 Difference]: Finished difference Result 891 states and 2475 transitions. [2021-08-21 12:00:33,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:00:33,954 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:00:33,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:33,956 INFO L225 Difference]: With dead ends: 891 [2021-08-21 12:00:33,956 INFO L226 Difference]: Without dead ends: 888 [2021-08-21 12:00:33,956 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:00:33,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-08-21 12:00:33,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 783. [2021-08-21 12:00:33,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 2.9820971867007673) internal successors, (2332), 782 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:33,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2332 transitions. [2021-08-21 12:00:33,966 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2332 transitions. Word has length 18 [2021-08-21 12:00:33,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:33,966 INFO L470 AbstractCegarLoop]: Abstraction has 783 states and 2332 transitions. [2021-08-21 12:00:33,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:33,966 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2332 transitions. [2021-08-21 12:00:33,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:00:33,968 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:33,968 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:33,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-08-21 12:00:34,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:34,189 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:34,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:34,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1275411173, now seen corresponding path program 86 times [2021-08-21 12:00:34,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:34,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457244155] [2021-08-21 12:00:34,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:34,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:34,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:34,264 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:34,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:34,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457244155] [2021-08-21 12:00:34,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457244155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:34,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734982208] [2021-08-21 12:00:34,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:00:34,264 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:34,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:34,265 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:34,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-21 12:00:34,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:00:34,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:34,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:00:34,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:35,045 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:00:35,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-08-21 12:00:35,378 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:35,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734982208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:35,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:35,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-08-21 12:00:35,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247249295] [2021-08-21 12:00:35,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:00:35,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:35,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:00:35,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:00:35,379 INFO L87 Difference]: Start difference. First operand 783 states and 2332 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:35,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:35,546 INFO L93 Difference]: Finished difference Result 957 states and 2691 transitions. [2021-08-21 12:00:35,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:00:35,546 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:00:35,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:35,548 INFO L225 Difference]: With dead ends: 957 [2021-08-21 12:00:35,548 INFO L226 Difference]: Without dead ends: 954 [2021-08-21 12:00:35,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:00:35,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2021-08-21 12:00:35,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 855. [2021-08-21 12:00:35,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 2.9953161592505855) internal successors, (2558), 854 states have internal predecessors, (2558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:35,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 2558 transitions. [2021-08-21 12:00:35,570 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 2558 transitions. Word has length 18 [2021-08-21 12:00:35,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:35,571 INFO L470 AbstractCegarLoop]: Abstraction has 855 states and 2558 transitions. [2021-08-21 12:00:35,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:35,571 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 2558 transitions. [2021-08-21 12:00:35,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:00:35,572 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:35,572 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:35,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:35,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:35,790 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:35,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:35,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1778288994, now seen corresponding path program 87 times [2021-08-21 12:00:35,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:35,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177335540] [2021-08-21 12:00:35,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:35,791 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:35,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:35,879 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:35,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:35,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177335540] [2021-08-21 12:00:35,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177335540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:35,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065532712] [2021-08-21 12:00:35,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:00:35,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:35,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:35,881 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:35,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-21 12:00:36,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:00:36,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:36,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:00:36,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:36,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065532712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:36,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:36,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 12:00:36,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778824064] [2021-08-21 12:00:36,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:00:36,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:36,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:00:36,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:00:36,489 INFO L87 Difference]: Start difference. First operand 855 states and 2558 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:36,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:36,727 INFO L93 Difference]: Finished difference Result 1060 states and 2882 transitions. [2021-08-21 12:00:36,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:00:36,727 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 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 19 [2021-08-21 12:00:36,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:36,729 INFO L225 Difference]: With dead ends: 1060 [2021-08-21 12:00:36,729 INFO L226 Difference]: Without dead ends: 1051 [2021-08-21 12:00:36,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 200.1ms TimeCoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:00:36,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-08-21 12:00:36,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 868. [2021-08-21 12:00:36,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 2.98961937716263) internal successors, (2592), 867 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:36,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2592 transitions. [2021-08-21 12:00:36,741 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2592 transitions. Word has length 19 [2021-08-21 12:00:36,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:36,742 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 2592 transitions. [2021-08-21 12:00:36,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:36,742 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2592 transitions. [2021-08-21 12:00:36,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:00:36,743 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:36,743 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:36,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:36,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:36,960 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:36,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:36,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1577918386, now seen corresponding path program 88 times [2021-08-21 12:00:36,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:36,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832281294] [2021-08-21 12:00:36,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:36,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:37,039 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:37,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:37,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832281294] [2021-08-21 12:00:37,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832281294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:37,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730299075] [2021-08-21 12:00:37,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:00:37,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:37,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:37,040 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:37,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-21 12:00:37,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:00:37,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:37,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:00:37,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:37,645 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:37,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730299075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:37,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:37,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 12:00:37,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076560221] [2021-08-21 12:00:37,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:00:37,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:37,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:00:37,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:00:37,647 INFO L87 Difference]: Start difference. First operand 868 states and 2592 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:37,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:37,834 INFO L93 Difference]: Finished difference Result 989 states and 2763 transitions. [2021-08-21 12:00:37,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:00:37,834 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 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 19 [2021-08-21 12:00:37,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:37,836 INFO L225 Difference]: With dead ends: 989 [2021-08-21 12:00:37,836 INFO L226 Difference]: Without dead ends: 983 [2021-08-21 12:00:37,836 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 178.1ms TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:00:37,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-08-21 12:00:37,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 869. [2021-08-21 12:00:37,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 2.978110599078341) internal successors, (2585), 868 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:37,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2585 transitions. [2021-08-21 12:00:37,846 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2585 transitions. Word has length 19 [2021-08-21 12:00:37,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:37,846 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 2585 transitions. [2021-08-21 12:00:37,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:37,847 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2585 transitions. [2021-08-21 12:00:37,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:00:37,848 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:37,848 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:37,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:38,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-08-21 12:00:38,063 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:38,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:38,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1923976364, now seen corresponding path program 89 times [2021-08-21 12:00:38,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:38,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263004043] [2021-08-21 12:00:38,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:38,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:38,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:38,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:38,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263004043] [2021-08-21 12:00:38,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263004043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:38,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446076480] [2021-08-21 12:00:38,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:00:38,125 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:38,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:38,126 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:38,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-21 12:00:38,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:00:38,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:38,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:00:38,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:38,703 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:38,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446076480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:38,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:38,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:00:38,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282510114] [2021-08-21 12:00:38,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:00:38,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:38,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:00:38,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:38,704 INFO L87 Difference]: Start difference. First operand 869 states and 2585 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:38,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:38,795 INFO L93 Difference]: Finished difference Result 900 states and 2628 transitions. [2021-08-21 12:00:38,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:00:38,796 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:00:38,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:38,797 INFO L225 Difference]: With dead ends: 900 [2021-08-21 12:00:38,797 INFO L226 Difference]: Without dead ends: 899 [2021-08-21 12:00:38,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 70.4ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:00:38,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2021-08-21 12:00:38,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 869. [2021-08-21 12:00:38,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 2.975806451612903) internal successors, (2583), 868 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:38,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2583 transitions. [2021-08-21 12:00:38,807 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2583 transitions. Word has length 19 [2021-08-21 12:00:38,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:38,807 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 2583 transitions. [2021-08-21 12:00:38,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:38,807 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2583 transitions. [2021-08-21 12:00:38,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:00:38,809 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:38,809 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:38,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:39,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:39,023 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:39,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:39,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1510269360, now seen corresponding path program 90 times [2021-08-21 12:00:39,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:39,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990430073] [2021-08-21 12:00:39,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:39,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:39,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:39,083 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:39,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:39,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990430073] [2021-08-21 12:00:39,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990430073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:39,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65322376] [2021-08-21 12:00:39,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:00:39,083 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:39,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:39,084 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:39,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-21 12:00:39,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:00:39,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:39,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:00:39,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:39,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65322376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:39,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:39,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:00:39,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081387499] [2021-08-21 12:00:39,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:00:39,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:39,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:00:39,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:39,712 INFO L87 Difference]: Start difference. First operand 869 states and 2583 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:39,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:39,758 INFO L93 Difference]: Finished difference Result 1072 states and 2905 transitions. [2021-08-21 12:00:39,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:00:39,758 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:00:39,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:39,760 INFO L225 Difference]: With dead ends: 1072 [2021-08-21 12:00:39,760 INFO L226 Difference]: Without dead ends: 1072 [2021-08-21 12:00:39,760 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:00:39,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-08-21 12:00:39,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 852. [2021-08-21 12:00:39,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 2.9600470035252644) internal successors, (2519), 851 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:39,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2519 transitions. [2021-08-21 12:00:39,773 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2519 transitions. Word has length 19 [2021-08-21 12:00:39,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:39,773 INFO L470 AbstractCegarLoop]: Abstraction has 852 states and 2519 transitions. [2021-08-21 12:00:39,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:39,773 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2519 transitions. [2021-08-21 12:00:39,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:00:39,774 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:39,774 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:39,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:39,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:39,992 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:39,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:39,992 INFO L82 PathProgramCache]: Analyzing trace with hash 389788130, now seen corresponding path program 91 times [2021-08-21 12:00:39,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:39,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532386314] [2021-08-21 12:00:39,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:39,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:39,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:40,050 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:40,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:40,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532386314] [2021-08-21 12:00:40,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532386314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:40,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020072770] [2021-08-21 12:00:40,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:00:40,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:40,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:40,052 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:40,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-21 12:00:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:40,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:00:40,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:40,626 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:40,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020072770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:40,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:40,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:00:40,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212318871] [2021-08-21 12:00:40,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:00:40,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:40,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:00:40,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:40,627 INFO L87 Difference]: Start difference. First operand 852 states and 2519 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:40,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:40,743 INFO L93 Difference]: Finished difference Result 1036 states and 2798 transitions. [2021-08-21 12:00:40,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:00:40,744 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:00:40,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:40,745 INFO L225 Difference]: With dead ends: 1036 [2021-08-21 12:00:40,745 INFO L226 Difference]: Without dead ends: 1034 [2021-08-21 12:00:40,745 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:00:40,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-08-21 12:00:40,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 860. [2021-08-21 12:00:40,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 2.9639115250291037) internal successors, (2546), 859 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:40,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2546 transitions. [2021-08-21 12:00:40,790 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2546 transitions. Word has length 19 [2021-08-21 12:00:40,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:40,790 INFO L470 AbstractCegarLoop]: Abstraction has 860 states and 2546 transitions. [2021-08-21 12:00:40,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:40,790 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2546 transitions. [2021-08-21 12:00:40,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:00:40,792 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:40,792 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:40,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:41,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:41,009 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:41,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:41,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1191404358, now seen corresponding path program 92 times [2021-08-21 12:00:41,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:41,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285940834] [2021-08-21 12:00:41,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:41,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:41,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:41,070 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:41,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:41,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285940834] [2021-08-21 12:00:41,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285940834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:41,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750396397] [2021-08-21 12:00:41,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:00:41,071 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:41,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:41,072 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:41,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-21 12:00:41,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:00:41,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:41,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:00:41,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:41,695 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:41,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750396397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:41,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:41,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:00:41,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335807679] [2021-08-21 12:00:41,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:00:41,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:41,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:00:41,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:41,696 INFO L87 Difference]: Start difference. First operand 860 states and 2546 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:41,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:41,774 INFO L93 Difference]: Finished difference Result 1071 states and 2918 transitions. [2021-08-21 12:00:41,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:00:41,774 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:00:41,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:41,776 INFO L225 Difference]: With dead ends: 1071 [2021-08-21 12:00:41,776 INFO L226 Difference]: Without dead ends: 1071 [2021-08-21 12:00:41,776 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:00:41,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2021-08-21 12:00:41,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 887. [2021-08-21 12:00:41,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 2.971783295711061) internal successors, (2633), 886 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:41,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 2633 transitions. [2021-08-21 12:00:41,788 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 2633 transitions. Word has length 19 [2021-08-21 12:00:41,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:41,788 INFO L470 AbstractCegarLoop]: Abstraction has 887 states and 2633 transitions. [2021-08-21 12:00:41,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:41,788 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 2633 transitions. [2021-08-21 12:00:41,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:00:41,789 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:41,789 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:41,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:42,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:42,009 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:42,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:42,009 INFO L82 PathProgramCache]: Analyzing trace with hash 2105690148, now seen corresponding path program 93 times [2021-08-21 12:00:42,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:42,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006246920] [2021-08-21 12:00:42,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:42,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:42,093 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:42,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:42,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006246920] [2021-08-21 12:00:42,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006246920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:42,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883414764] [2021-08-21 12:00:42,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:00:42,098 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:42,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:42,099 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:42,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-21 12:00:42,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:00:42,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:42,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:00:42,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:42,702 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:42,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883414764] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:42,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:42,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:00:42,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324323892] [2021-08-21 12:00:42,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:00:42,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:42,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:00:42,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:42,703 INFO L87 Difference]: Start difference. First operand 887 states and 2633 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:42,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:42,796 INFO L93 Difference]: Finished difference Result 1016 states and 2820 transitions. [2021-08-21 12:00:42,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:00:42,796 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:00:42,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:42,797 INFO L225 Difference]: With dead ends: 1016 [2021-08-21 12:00:42,798 INFO L226 Difference]: Without dead ends: 1014 [2021-08-21 12:00:42,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:00:42,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2021-08-21 12:00:42,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 869. [2021-08-21 12:00:42,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 2.9619815668202767) internal successors, (2571), 868 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:42,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2571 transitions. [2021-08-21 12:00:42,808 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2571 transitions. Word has length 19 [2021-08-21 12:00:42,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:42,808 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 2571 transitions. [2021-08-21 12:00:42,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:42,808 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2571 transitions. [2021-08-21 12:00:42,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:00:42,809 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:42,809 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:42,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-08-21 12:00:43,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-08-21 12:00:43,025 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:43,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:43,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1328555576, now seen corresponding path program 94 times [2021-08-21 12:00:43,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:43,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561400683] [2021-08-21 12:00:43,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:43,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:43,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:43,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561400683] [2021-08-21 12:00:43,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561400683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:43,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22969191] [2021-08-21 12:00:43,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:00:43,099 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:43,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:43,100 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:43,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-21 12:00:43,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:00:43,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:43,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:00:43,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:43,722 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:43,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22969191] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:43,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:43,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:00:43,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389218428] [2021-08-21 12:00:43,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:00:43,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:43,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:00:43,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:43,723 INFO L87 Difference]: Start difference. First operand 869 states and 2571 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:43,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:43,769 INFO L93 Difference]: Finished difference Result 1091 states and 2911 transitions. [2021-08-21 12:00:43,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:00:43,770 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:00:43,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:43,771 INFO L225 Difference]: With dead ends: 1091 [2021-08-21 12:00:43,771 INFO L226 Difference]: Without dead ends: 1091 [2021-08-21 12:00:43,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:00:43,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2021-08-21 12:00:43,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 872. [2021-08-21 12:00:43,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 2.959816303099885) internal successors, (2578), 871 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:43,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2578 transitions. [2021-08-21 12:00:43,783 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2578 transitions. Word has length 19 [2021-08-21 12:00:43,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:43,783 INFO L470 AbstractCegarLoop]: Abstraction has 872 states and 2578 transitions. [2021-08-21 12:00:43,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:43,783 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2578 transitions. [2021-08-21 12:00:43,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:00:43,784 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:43,784 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:43,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:43,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-08-21 12:00:43,986 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:43,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:43,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1333970494, now seen corresponding path program 95 times [2021-08-21 12:00:43,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:43,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813947545] [2021-08-21 12:00:43,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:43,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:44,057 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:44,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:44,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813947545] [2021-08-21 12:00:44,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813947545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:44,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355987432] [2021-08-21 12:00:44,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:00:44,058 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:44,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:44,058 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:44,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-21 12:00:44,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:00:44,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:44,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:00:44,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:44,704 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:44,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355987432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:44,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:44,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 12:00:44,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485152515] [2021-08-21 12:00:44,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:00:44,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:44,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:00:44,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:00:44,705 INFO L87 Difference]: Start difference. First operand 872 states and 2578 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:44,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:44,846 INFO L93 Difference]: Finished difference Result 981 states and 2742 transitions. [2021-08-21 12:00:44,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:00:44,847 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:00:44,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:44,848 INFO L225 Difference]: With dead ends: 981 [2021-08-21 12:00:44,848 INFO L226 Difference]: Without dead ends: 979 [2021-08-21 12:00:44,849 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:00:44,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2021-08-21 12:00:44,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 872. [2021-08-21 12:00:44,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 2.95752009184845) internal successors, (2576), 871 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:44,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2576 transitions. [2021-08-21 12:00:44,860 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2576 transitions. Word has length 19 [2021-08-21 12:00:44,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:44,860 INFO L470 AbstractCegarLoop]: Abstraction has 872 states and 2576 transitions. [2021-08-21 12:00:44,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:44,861 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2576 transitions. [2021-08-21 12:00:44,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:00:44,863 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:44,864 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:44,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:45,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:45,081 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:45,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:45,081 INFO L82 PathProgramCache]: Analyzing trace with hash 382057732, now seen corresponding path program 96 times [2021-08-21 12:00:45,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:45,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567631423] [2021-08-21 12:00:45,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:45,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:45,181 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:45,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:45,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567631423] [2021-08-21 12:00:45,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567631423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:45,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609294739] [2021-08-21 12:00:45,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:00:45,181 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:45,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:45,197 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:45,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-21 12:00:45,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:00:45,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:45,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:00:45,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:45,834 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:45,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609294739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:45,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:45,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 12:00:45,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085821202] [2021-08-21 12:00:45,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:00:45,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:45,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:00:45,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:00:45,835 INFO L87 Difference]: Start difference. First operand 872 states and 2576 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:45,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:45,903 INFO L93 Difference]: Finished difference Result 1169 states and 3091 transitions. [2021-08-21 12:00:45,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:00:45,903 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:00:45,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:45,905 INFO L225 Difference]: With dead ends: 1169 [2021-08-21 12:00:45,905 INFO L226 Difference]: Without dead ends: 1169 [2021-08-21 12:00:45,905 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:00:45,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-08-21 12:00:45,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 853. [2021-08-21 12:00:45,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 2.9413145539906105) internal successors, (2506), 852 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:45,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2506 transitions. [2021-08-21 12:00:45,918 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2506 transitions. Word has length 19 [2021-08-21 12:00:45,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:45,918 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 2506 transitions. [2021-08-21 12:00:45,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:45,918 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2506 transitions. [2021-08-21 12:00:45,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:00:45,919 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:45,919 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:45,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:46,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:46,131 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:46,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:46,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1727948138, now seen corresponding path program 97 times [2021-08-21 12:00:46,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:46,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939898661] [2021-08-21 12:00:46,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:46,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:46,194 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:46,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:46,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939898661] [2021-08-21 12:00:46,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939898661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:46,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75053919] [2021-08-21 12:00:46,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:00:46,195 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:46,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:46,196 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:46,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-21 12:00:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:46,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:00:46,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:46,828 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:46,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75053919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:46,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:46,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:00:46,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478296258] [2021-08-21 12:00:46,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:00:46,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:46,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:00:46,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:46,829 INFO L87 Difference]: Start difference. First operand 853 states and 2506 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:46,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:46,924 INFO L93 Difference]: Finished difference Result 1042 states and 2792 transitions. [2021-08-21 12:00:46,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:00:46,924 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:00:46,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:46,926 INFO L225 Difference]: With dead ends: 1042 [2021-08-21 12:00:46,926 INFO L226 Difference]: Without dead ends: 1040 [2021-08-21 12:00:46,926 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:00:46,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2021-08-21 12:00:46,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 863. [2021-08-21 12:00:46,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 2.9443155452436196) internal successors, (2538), 862 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:46,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2538 transitions. [2021-08-21 12:00:46,937 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2538 transitions. Word has length 19 [2021-08-21 12:00:46,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:46,938 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 2538 transitions. [2021-08-21 12:00:46,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:46,938 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2538 transitions. [2021-08-21 12:00:46,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:00:46,939 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:46,939 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:46,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:47,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-21 12:00:47,153 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:47,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:47,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1765402930, now seen corresponding path program 98 times [2021-08-21 12:00:47,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:47,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288675336] [2021-08-21 12:00:47,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:47,153 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:47,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:47,211 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:47,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:47,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288675336] [2021-08-21 12:00:47,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288675336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:47,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176550909] [2021-08-21 12:00:47,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:00:47,211 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:47,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:47,213 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:47,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-21 12:00:47,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:00:47,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:47,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:00:47,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:47,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176550909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:47,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:47,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:00:47,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581672810] [2021-08-21 12:00:47,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:00:47,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:47,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:00:47,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:47,857 INFO L87 Difference]: Start difference. First operand 863 states and 2538 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:47,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:47,925 INFO L93 Difference]: Finished difference Result 1081 states and 2905 transitions. [2021-08-21 12:00:47,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:00:47,925 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:00:47,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:47,927 INFO L225 Difference]: With dead ends: 1081 [2021-08-21 12:00:47,927 INFO L226 Difference]: Without dead ends: 1081 [2021-08-21 12:00:47,927 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:00:47,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-08-21 12:00:47,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 876. [2021-08-21 12:00:47,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.9497142857142857) internal successors, (2581), 875 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:47,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2581 transitions. [2021-08-21 12:00:47,938 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2581 transitions. Word has length 19 [2021-08-21 12:00:47,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:47,938 INFO L470 AbstractCegarLoop]: Abstraction has 876 states and 2581 transitions. [2021-08-21 12:00:47,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:47,938 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2581 transitions. [2021-08-21 12:00:47,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:00:47,939 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:47,939 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:47,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:48,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:48,157 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:48,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:48,157 INFO L82 PathProgramCache]: Analyzing trace with hash -851117140, now seen corresponding path program 99 times [2021-08-21 12:00:48,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:48,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780919010] [2021-08-21 12:00:48,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:48,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:48,213 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:48,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:48,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780919010] [2021-08-21 12:00:48,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780919010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:48,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260551395] [2021-08-21 12:00:48,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:00:48,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:48,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:48,214 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:48,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-21 12:00:48,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:00:48,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:48,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:00:48,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:48,948 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:00:48,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260551395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:48,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:48,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-08-21 12:00:48,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218351182] [2021-08-21 12:00:48,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:00:48,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:48,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:00:48,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:00:48,949 INFO L87 Difference]: Start difference. First operand 876 states and 2581 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:49,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:49,732 INFO L93 Difference]: Finished difference Result 1972 states and 5386 transitions. [2021-08-21 12:00:49,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-21 12:00:49,733 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:00:49,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:49,736 INFO L225 Difference]: With dead ends: 1972 [2021-08-21 12:00:49,736 INFO L226 Difference]: Without dead ends: 1957 [2021-08-21 12:00:49,736 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 564.0ms TimeCoverageRelationStatistics Valid=536, Invalid=3886, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 12:00:49,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2021-08-21 12:00:49,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1324. [2021-08-21 12:00:49,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 2.90854119425548) internal successors, (3848), 1323 states have internal predecessors, (3848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:49,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 3848 transitions. [2021-08-21 12:00:49,756 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 3848 transitions. Word has length 19 [2021-08-21 12:00:49,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:49,756 INFO L470 AbstractCegarLoop]: Abstraction has 1324 states and 3848 transitions. [2021-08-21 12:00:49,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:49,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 3848 transitions. [2021-08-21 12:00:49,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:00:49,757 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:49,757 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:49,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:49,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-21 12:00:49,962 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:49,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:49,963 INFO L82 PathProgramCache]: Analyzing trace with hash 9604432, now seen corresponding path program 100 times [2021-08-21 12:00:49,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:49,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958607643] [2021-08-21 12:00:49,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:49,963 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:49,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:50,040 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:50,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:50,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958607643] [2021-08-21 12:00:50,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958607643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:50,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480908194] [2021-08-21 12:00:50,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:00:50,040 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:50,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:50,042 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:50,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-21 12:00:50,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:00:50,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:50,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:00:50,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:50,709 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:50,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480908194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:50,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:50,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:00:50,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854761515] [2021-08-21 12:00:50,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:00:50,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:50,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:00:50,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:50,710 INFO L87 Difference]: Start difference. First operand 1324 states and 3848 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:50,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:50,755 INFO L93 Difference]: Finished difference Result 1528 states and 4101 transitions. [2021-08-21 12:00:50,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:00:50,756 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:00:50,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:50,758 INFO L225 Difference]: With dead ends: 1528 [2021-08-21 12:00:50,759 INFO L226 Difference]: Without dead ends: 1528 [2021-08-21 12:00:50,759 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:00:50,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2021-08-21 12:00:50,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 1308. [2021-08-21 12:00:50,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1308 states, 1307 states have (on average 2.8967100229533282) internal successors, (3786), 1307 states have internal predecessors, (3786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:50,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 3786 transitions. [2021-08-21 12:00:50,775 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 3786 transitions. Word has length 19 [2021-08-21 12:00:50,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:50,775 INFO L470 AbstractCegarLoop]: Abstraction has 1308 states and 3786 transitions. [2021-08-21 12:00:50,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:50,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 3786 transitions. [2021-08-21 12:00:50,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:00:50,776 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:50,776 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:50,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:50,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-21 12:00:50,994 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:50,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:50,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1720217740, now seen corresponding path program 101 times [2021-08-21 12:00:50,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:50,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193445842] [2021-08-21 12:00:50,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:50,995 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:51,055 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:51,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:51,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193445842] [2021-08-21 12:00:51,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193445842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:51,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983004103] [2021-08-21 12:00:51,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:00:51,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:51,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:51,056 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:51,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-21 12:00:51,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:00:51,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:51,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:00:51,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:51,711 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:51,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983004103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:51,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:51,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 12:00:51,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422359018] [2021-08-21 12:00:51,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:00:51,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:51,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:00:51,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:00:51,712 INFO L87 Difference]: Start difference. First operand 1308 states and 3786 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:51,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:51,775 INFO L93 Difference]: Finished difference Result 1659 states and 4393 transitions. [2021-08-21 12:00:51,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:00:51,775 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:00:51,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:51,777 INFO L225 Difference]: With dead ends: 1659 [2021-08-21 12:00:51,777 INFO L226 Difference]: Without dead ends: 1659 [2021-08-21 12:00:51,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:00:51,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2021-08-21 12:00:51,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1311. [2021-08-21 12:00:51,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1311 states, 1310 states have (on average 2.8969465648854964) internal successors, (3795), 1310 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:51,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 3795 transitions. [2021-08-21 12:00:51,794 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 3795 transitions. Word has length 19 [2021-08-21 12:00:51,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:51,795 INFO L470 AbstractCegarLoop]: Abstraction has 1311 states and 3795 transitions. [2021-08-21 12:00:51,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:51,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 3795 transitions. [2021-08-21 12:00:51,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:00:51,796 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:51,796 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:51,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:52,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-08-21 12:00:52,010 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:52,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:52,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1085344560, now seen corresponding path program 102 times [2021-08-21 12:00:52,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:52,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921383678] [2021-08-21 12:00:52,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:52,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:52,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:52,068 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:52,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:52,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921383678] [2021-08-21 12:00:52,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921383678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:52,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686490657] [2021-08-21 12:00:52,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:00:52,068 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:52,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:52,069 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:52,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-21 12:00:52,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:00:52,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:52,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:00:52,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:52,748 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:52,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686490657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:52,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:52,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 12:00:52,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472234812] [2021-08-21 12:00:52,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:00:52,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:52,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:00:52,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:00:52,749 INFO L87 Difference]: Start difference. First operand 1311 states and 3795 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:52,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:52,843 INFO L93 Difference]: Finished difference Result 2095 states and 5727 transitions. [2021-08-21 12:00:52,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:00:52,843 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:00:52,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:52,846 INFO L225 Difference]: With dead ends: 2095 [2021-08-21 12:00:52,846 INFO L226 Difference]: Without dead ends: 2095 [2021-08-21 12:00:52,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:00:52,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2021-08-21 12:00:52,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 1595. [2021-08-21 12:00:52,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 2.9717691342534502) internal successors, (4737), 1594 states have internal predecessors, (4737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:52,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 4737 transitions. [2021-08-21 12:00:52,870 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 4737 transitions. Word has length 19 [2021-08-21 12:00:52,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:52,870 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 4737 transitions. [2021-08-21 12:00:52,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:52,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 4737 transitions. [2021-08-21 12:00:52,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:00:52,872 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:52,872 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:52,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:53,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:53,085 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:53,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:53,085 INFO L82 PathProgramCache]: Analyzing trace with hash 479871556, now seen corresponding path program 103 times [2021-08-21 12:00:53,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:53,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701213605] [2021-08-21 12:00:53,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:53,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:00:53,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:53,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701213605] [2021-08-21 12:00:53,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701213605] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:53,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177577216] [2021-08-21 12:00:53,137 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:00:53,137 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:53,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:53,138 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:53,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-21 12:00:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:53,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:00:53,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:53,841 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:00:53,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177577216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:53,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:53,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:00:53,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884728596] [2021-08-21 12:00:53,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:00:53,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:53,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:00:53,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:00:53,842 INFO L87 Difference]: Start difference. First operand 1595 states and 4737 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:53,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:53,937 INFO L93 Difference]: Finished difference Result 1821 states and 5142 transitions. [2021-08-21 12:00:53,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:00:53,937 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:00:53,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:53,940 INFO L225 Difference]: With dead ends: 1821 [2021-08-21 12:00:53,940 INFO L226 Difference]: Without dead ends: 1817 [2021-08-21 12:00:53,940 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:00:53,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2021-08-21 12:00:53,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1651. [2021-08-21 12:00:53,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 2.981818181818182) internal successors, (4920), 1650 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:53,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 4920 transitions. [2021-08-21 12:00:53,961 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 4920 transitions. Word has length 19 [2021-08-21 12:00:53,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:53,961 INFO L470 AbstractCegarLoop]: Abstraction has 1651 states and 4920 transitions. [2021-08-21 12:00:53,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:53,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 4920 transitions. [2021-08-21 12:00:53,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:00:53,963 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:53,963 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:53,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:54,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:54,181 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:54,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:54,182 INFO L82 PathProgramCache]: Analyzing trace with hash 648818436, now seen corresponding path program 104 times [2021-08-21 12:00:54,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:54,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186490188] [2021-08-21 12:00:54,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:54,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:54,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:54,245 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:54,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:54,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186490188] [2021-08-21 12:00:54,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186490188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:54,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121701873] [2021-08-21 12:00:54,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:00:54,246 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:54,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:54,246 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:54,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-21 12:00:54,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:00:54,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:54,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:00:54,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:54,926 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:54,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121701873] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:54,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:54,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 12:00:54,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435427715] [2021-08-21 12:00:54,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:00:54,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:54,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:00:54,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:00:54,927 INFO L87 Difference]: Start difference. First operand 1651 states and 4920 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:55,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:55,017 INFO L93 Difference]: Finished difference Result 2216 states and 6127 transitions. [2021-08-21 12:00:55,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:00:55,018 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:00:55,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:55,021 INFO L225 Difference]: With dead ends: 2216 [2021-08-21 12:00:55,021 INFO L226 Difference]: Without dead ends: 2216 [2021-08-21 12:00:55,021 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:00:55,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2021-08-21 12:00:55,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 1361. [2021-08-21 12:00:55,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 2.927941176470588) internal successors, (3982), 1360 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:55,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 3982 transitions. [2021-08-21 12:00:55,045 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 3982 transitions. Word has length 19 [2021-08-21 12:00:55,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:55,045 INFO L470 AbstractCegarLoop]: Abstraction has 1361 states and 3982 transitions. [2021-08-21 12:00:55,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:55,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 3982 transitions. [2021-08-21 12:00:55,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:00:55,046 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:55,046 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:55,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-08-21 12:00:55,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-21 12:00:55,266 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:55,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:55,267 INFO L82 PathProgramCache]: Analyzing trace with hash 261235426, now seen corresponding path program 105 times [2021-08-21 12:00:55,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:55,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199781984] [2021-08-21 12:00:55,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:55,267 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:55,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:55,337 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:55,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:55,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199781984] [2021-08-21 12:00:55,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199781984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:55,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897648468] [2021-08-21 12:00:55,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:00:55,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:55,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:55,338 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:55,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-21 12:00:55,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:00:55,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:55,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:00:55,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:56,035 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:56,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897648468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:56,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:56,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:00:56,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876445099] [2021-08-21 12:00:56,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:00:56,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:56,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:00:56,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:56,036 INFO L87 Difference]: Start difference. First operand 1361 states and 3982 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:56,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:56,135 INFO L93 Difference]: Finished difference Result 1565 states and 4270 transitions. [2021-08-21 12:00:56,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:00:56,135 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:00:56,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:56,138 INFO L225 Difference]: With dead ends: 1565 [2021-08-21 12:00:56,138 INFO L226 Difference]: Without dead ends: 1561 [2021-08-21 12:00:56,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 70.4ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:00:56,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1561 states. [2021-08-21 12:00:56,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1561 to 1344. [2021-08-21 12:00:56,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 2.915860014892033) internal successors, (3916), 1343 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:56,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 3916 transitions. [2021-08-21 12:00:56,157 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 3916 transitions. Word has length 19 [2021-08-21 12:00:56,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:56,158 INFO L470 AbstractCegarLoop]: Abstraction has 1344 states and 3916 transitions. [2021-08-21 12:00:56,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:56,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 3916 transitions. [2021-08-21 12:00:56,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:00:56,159 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:56,159 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:56,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:56,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:56,378 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:56,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:56,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1457108280, now seen corresponding path program 106 times [2021-08-21 12:00:56,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:56,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878051495] [2021-08-21 12:00:56,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:56,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:56,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:56,468 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:56,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:56,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878051495] [2021-08-21 12:00:56,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878051495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:56,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940611185] [2021-08-21 12:00:56,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:00:56,469 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:56,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:56,485 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:56,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-21 12:00:57,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:00:57,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:57,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:00:57,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:57,174 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:57,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940611185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:57,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:57,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:00:57,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096903879] [2021-08-21 12:00:57,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:00:57,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:57,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:00:57,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:57,175 INFO L87 Difference]: Start difference. First operand 1344 states and 3916 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:57,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:57,241 INFO L93 Difference]: Finished difference Result 1620 states and 4356 transitions. [2021-08-21 12:00:57,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:00:57,242 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:00:57,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:57,244 INFO L225 Difference]: With dead ends: 1620 [2021-08-21 12:00:57,244 INFO L226 Difference]: Without dead ends: 1620 [2021-08-21 12:00:57,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:00:57,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2021-08-21 12:00:57,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 1345. [2021-08-21 12:00:57,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 2.9107142857142856) internal successors, (3912), 1344 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:57,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 3912 transitions. [2021-08-21 12:00:57,261 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 3912 transitions. Word has length 19 [2021-08-21 12:00:57,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:57,261 INFO L470 AbstractCegarLoop]: Abstraction has 1345 states and 3912 transitions. [2021-08-21 12:00:57,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:57,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 3912 transitions. [2021-08-21 12:00:57,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:00:57,263 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:57,263 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:57,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:57,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:57,477 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:57,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:57,477 INFO L82 PathProgramCache]: Analyzing trace with hash 253505028, now seen corresponding path program 107 times [2021-08-21 12:00:57,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:57,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701654156] [2021-08-21 12:00:57,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:57,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:57,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:57,556 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:57,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:57,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701654156] [2021-08-21 12:00:57,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701654156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:57,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829675411] [2021-08-21 12:00:57,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:00:57,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:57,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:57,557 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:57,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-21 12:00:58,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:00:58,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:58,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:00:58,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:58,252 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:58,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829675411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:58,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:58,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 12:00:58,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057707958] [2021-08-21 12:00:58,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:00:58,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:58,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:00:58,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:00:58,253 INFO L87 Difference]: Start difference. First operand 1345 states and 3912 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:58,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:58,307 INFO L93 Difference]: Finished difference Result 1527 states and 4123 transitions. [2021-08-21 12:00:58,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:00:58,308 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:00:58,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:58,309 INFO L225 Difference]: With dead ends: 1527 [2021-08-21 12:00:58,309 INFO L226 Difference]: Without dead ends: 1527 [2021-08-21 12:00:58,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:00:58,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2021-08-21 12:00:58,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 1307. [2021-08-21 12:00:58,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1306 states have (on average 2.8950995405819295) internal successors, (3781), 1306 states have internal predecessors, (3781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:58,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 3781 transitions. [2021-08-21 12:00:58,325 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 3781 transitions. Word has length 19 [2021-08-21 12:00:58,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:58,325 INFO L470 AbstractCegarLoop]: Abstraction has 1307 states and 3781 transitions. [2021-08-21 12:00:58,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:58,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 3781 transitions. [2021-08-21 12:00:58,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:00:58,327 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:58,327 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:58,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:58,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:58,545 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:58,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:58,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1742910024, now seen corresponding path program 108 times [2021-08-21 12:00:58,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:58,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245963080] [2021-08-21 12:00:58,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:58,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:58,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:58,607 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:58,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:58,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245963080] [2021-08-21 12:00:58,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245963080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:58,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888865618] [2021-08-21 12:00:58,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:00:58,608 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:58,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:58,609 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:58,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-21 12:00:59,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:00:59,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:59,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:00:59,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:59,323 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:59,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888865618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:59,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:59,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 12:00:59,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042098348] [2021-08-21 12:00:59,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:00:59,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:59,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:00:59,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:00:59,324 INFO L87 Difference]: Start difference. First operand 1307 states and 3781 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:59,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:59,412 INFO L93 Difference]: Finished difference Result 1647 states and 4395 transitions. [2021-08-21 12:00:59,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:00:59,412 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:00:59,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:59,414 INFO L225 Difference]: With dead ends: 1647 [2021-08-21 12:00:59,414 INFO L226 Difference]: Without dead ends: 1647 [2021-08-21 12:00:59,414 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:00:59,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-08-21 12:00:59,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1251. [2021-08-21 12:00:59,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 2.8672) internal successors, (3584), 1250 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:59,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 3584 transitions. [2021-08-21 12:00:59,430 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 3584 transitions. Word has length 19 [2021-08-21 12:00:59,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:59,431 INFO L470 AbstractCegarLoop]: Abstraction has 1251 states and 3584 transitions. [2021-08-21 12:00:59,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:59,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 3584 transitions. [2021-08-21 12:00:59,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:00:59,432 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:59,432 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:59,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-21 12:00:59,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-21 12:00:59,651 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:59,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:59,651 INFO L82 PathProgramCache]: Analyzing trace with hash 669824644, now seen corresponding path program 109 times [2021-08-21 12:00:59,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:59,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196040515] [2021-08-21 12:00:59,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:59,651 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:59,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:59,710 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:59,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:59,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196040515] [2021-08-21 12:00:59,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196040515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:59,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633091248] [2021-08-21 12:00:59,710 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:00:59,711 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:59,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:59,711 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:59,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-21 12:01:00,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:00,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:00,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:00,422 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:00,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633091248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:00,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:00,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 12:01:00,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451053851] [2021-08-21 12:01:00,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:01:00,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:00,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:01:00,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:01:00,423 INFO L87 Difference]: Start difference. First operand 1251 states and 3584 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:00,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:00,554 INFO L93 Difference]: Finished difference Result 2090 states and 5611 transitions. [2021-08-21 12:01:00,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:01:00,554 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:00,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:00,557 INFO L225 Difference]: With dead ends: 2090 [2021-08-21 12:01:00,557 INFO L226 Difference]: Without dead ends: 2090 [2021-08-21 12:01:00,557 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 101.4ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:01:00,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2021-08-21 12:01:00,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 1462. [2021-08-21 12:01:00,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1461 states have (on average 2.941820670773443) internal successors, (4298), 1461 states have internal predecessors, (4298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:00,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 4298 transitions. [2021-08-21 12:01:00,581 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 4298 transitions. Word has length 19 [2021-08-21 12:01:00,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:00,581 INFO L470 AbstractCegarLoop]: Abstraction has 1462 states and 4298 transitions. [2021-08-21 12:01:00,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:00,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 4298 transitions. [2021-08-21 12:01:00,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:00,582 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:00,582 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:00,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:00,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-21 12:01:00,801 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:00,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:00,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1405697328, now seen corresponding path program 110 times [2021-08-21 12:01:00,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:00,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597795141] [2021-08-21 12:01:00,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:00,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:00,874 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:00,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:00,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597795141] [2021-08-21 12:01:00,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597795141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:00,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029532417] [2021-08-21 12:01:00,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:01:00,875 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:00,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:00,875 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:00,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-21 12:01:01,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:01:01,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:01,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:01,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:01,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029532417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:01,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:01,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:01:01,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932447568] [2021-08-21 12:01:01,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:01:01,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:01,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:01:01,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:01:01,628 INFO L87 Difference]: Start difference. First operand 1462 states and 4298 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:01,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:01,755 INFO L93 Difference]: Finished difference Result 1946 states and 5289 transitions. [2021-08-21 12:01:01,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:01:01,755 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:01,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:01,758 INFO L225 Difference]: With dead ends: 1946 [2021-08-21 12:01:01,758 INFO L226 Difference]: Without dead ends: 1946 [2021-08-21 12:01:01,758 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:01:01,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2021-08-21 12:01:01,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1168. [2021-08-21 12:01:01,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 2.8757497857754926) internal successors, (3356), 1167 states have internal predecessors, (3356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:01,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3356 transitions. [2021-08-21 12:01:01,777 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3356 transitions. Word has length 19 [2021-08-21 12:01:01,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:01,777 INFO L470 AbstractCegarLoop]: Abstraction has 1168 states and 3356 transitions. [2021-08-21 12:01:01,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:01,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3356 transitions. [2021-08-21 12:01:01,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:01,779 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:01,779 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:01,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:01,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-21 12:01:01,997 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:01,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:01,997 INFO L82 PathProgramCache]: Analyzing trace with hash 2037781610, now seen corresponding path program 111 times [2021-08-21 12:01:01,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:01,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335342929] [2021-08-21 12:01:01,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:01,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:02,046 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:02,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:02,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335342929] [2021-08-21 12:01:02,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335342929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:02,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573941029] [2021-08-21 12:01:02,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:01:02,047 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:02,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:02,047 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:02,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-21 12:01:02,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:01:02,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:02,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:02,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:02,778 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:02,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573941029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:02,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:02,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:01:02,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438715099] [2021-08-21 12:01:02,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:02,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:02,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:02,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:02,779 INFO L87 Difference]: Start difference. First operand 1168 states and 3356 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:02,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:02,873 INFO L93 Difference]: Finished difference Result 1346 states and 3610 transitions. [2021-08-21 12:01:02,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:01:02,873 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:02,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:02,875 INFO L225 Difference]: With dead ends: 1346 [2021-08-21 12:01:02,875 INFO L226 Difference]: Without dead ends: 1342 [2021-08-21 12:01:02,875 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:01:02,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-08-21 12:01:02,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1135. [2021-08-21 12:01:02,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 2.853615520282187) internal successors, (3236), 1134 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:02,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 3236 transitions. [2021-08-21 12:01:02,889 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 3236 transitions. Word has length 19 [2021-08-21 12:01:02,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:02,889 INFO L470 AbstractCegarLoop]: Abstraction has 1135 states and 3236 transitions. [2021-08-21 12:01:02,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:02,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 3236 transitions. [2021-08-21 12:01:02,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:02,890 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:02,890 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:02,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:03,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-21 12:01:03,109 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:03,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:03,109 INFO L82 PathProgramCache]: Analyzing trace with hash 319437904, now seen corresponding path program 112 times [2021-08-21 12:01:03,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:03,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182695732] [2021-08-21 12:01:03,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:03,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:03,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:03,162 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:03,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:03,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182695732] [2021-08-21 12:01:03,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182695732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:03,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119989825] [2021-08-21 12:01:03,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:01:03,162 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:03,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:03,163 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:03,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-21 12:01:03,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:01:03,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:03,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:03,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:03,867 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:03,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119989825] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:03,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:03,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:01:03,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346912762] [2021-08-21 12:01:03,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:03,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:03,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:03,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:03,868 INFO L87 Difference]: Start difference. First operand 1135 states and 3236 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:03,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:03,928 INFO L93 Difference]: Finished difference Result 1405 states and 3682 transitions. [2021-08-21 12:01:03,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:01:03,928 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:03,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:03,930 INFO L225 Difference]: With dead ends: 1405 [2021-08-21 12:01:03,930 INFO L226 Difference]: Without dead ends: 1405 [2021-08-21 12:01:03,930 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:01:03,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-08-21 12:01:03,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1141. [2021-08-21 12:01:03,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 2.8508771929824563) internal successors, (3250), 1140 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:03,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3250 transitions. [2021-08-21 12:01:03,945 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3250 transitions. Word has length 19 [2021-08-21 12:01:03,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:03,946 INFO L470 AbstractCegarLoop]: Abstraction has 1141 states and 3250 transitions. [2021-08-21 12:01:03,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:03,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3250 transitions. [2021-08-21 12:01:03,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:03,947 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:03,947 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:03,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:04,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:04,161 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:04,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:04,161 INFO L82 PathProgramCache]: Analyzing trace with hash 2030051212, now seen corresponding path program 113 times [2021-08-21 12:01:04,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:04,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120128107] [2021-08-21 12:01:04,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:04,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:04,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:04,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:04,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120128107] [2021-08-21 12:01:04,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120128107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:04,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124811294] [2021-08-21 12:01:04,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:01:04,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:04,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:04,221 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:04,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-21 12:01:04,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:01:04,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:04,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:04,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:04,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124811294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:04,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:04,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 12:01:04,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358587529] [2021-08-21 12:01:04,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:01:04,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:04,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:01:04,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:01:04,954 INFO L87 Difference]: Start difference. First operand 1141 states and 3250 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:05,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:05,018 INFO L93 Difference]: Finished difference Result 1401 states and 3674 transitions. [2021-08-21 12:01:05,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:01:05,018 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:05,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:05,020 INFO L225 Difference]: With dead ends: 1401 [2021-08-21 12:01:05,020 INFO L226 Difference]: Without dead ends: 1401 [2021-08-21 12:01:05,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:01:05,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-08-21 12:01:05,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1088. [2021-08-21 12:01:05,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 2.827046918123275) internal successors, (3073), 1087 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:05,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 3073 transitions. [2021-08-21 12:01:05,036 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 3073 transitions. Word has length 19 [2021-08-21 12:01:05,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:05,036 INFO L470 AbstractCegarLoop]: Abstraction has 1088 states and 3073 transitions. [2021-08-21 12:01:05,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:05,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 3073 transitions. [2021-08-21 12:01:05,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:05,037 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:05,037 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:05,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-08-21 12:01:05,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:05,256 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:05,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:05,256 INFO L82 PathProgramCache]: Analyzing trace with hash -775511088, now seen corresponding path program 114 times [2021-08-21 12:01:05,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:05,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622214427] [2021-08-21 12:01:05,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:05,256 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:05,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:05,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:05,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622214427] [2021-08-21 12:01:05,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622214427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:05,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247661198] [2021-08-21 12:01:05,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:01:05,315 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:05,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:05,316 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:05,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-21 12:01:06,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:01:06,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:06,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:06,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:06,049 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:06,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247661198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:06,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:06,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 12:01:06,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801806255] [2021-08-21 12:01:06,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:01:06,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:06,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:01:06,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:01:06,050 INFO L87 Difference]: Start difference. First operand 1088 states and 3073 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:06,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:06,104 INFO L93 Difference]: Finished difference Result 1622 states and 4358 transitions. [2021-08-21 12:01:06,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:01:06,105 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:06,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:06,107 INFO L225 Difference]: With dead ends: 1622 [2021-08-21 12:01:06,107 INFO L226 Difference]: Without dead ends: 1622 [2021-08-21 12:01:06,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 53.9ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:01:06,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-08-21 12:01:06,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1422. [2021-08-21 12:01:06,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1421 states have (on average 2.8754398311048557) internal successors, (4086), 1421 states have internal predecessors, (4086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:06,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 4086 transitions. [2021-08-21 12:01:06,139 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 4086 transitions. Word has length 19 [2021-08-21 12:01:06,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:06,139 INFO L470 AbstractCegarLoop]: Abstraction has 1422 states and 4086 transitions. [2021-08-21 12:01:06,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:06,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 4086 transitions. [2021-08-21 12:01:06,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:06,141 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:06,141 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:06,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:06,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-21 12:01:06,360 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:06,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:06,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1848596468, now seen corresponding path program 115 times [2021-08-21 12:01:06,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:06,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384358415] [2021-08-21 12:01:06,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:06,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:06,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:06,428 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:06,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:06,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384358415] [2021-08-21 12:01:06,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384358415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:06,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597944012] [2021-08-21 12:01:06,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:01:06,428 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:06,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:06,429 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:06,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-21 12:01:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:07,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:07,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:07,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597944012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:07,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:07,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:01:07,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531266856] [2021-08-21 12:01:07,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:01:07,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:07,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:01:07,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:01:07,159 INFO L87 Difference]: Start difference. First operand 1422 states and 4086 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:07,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:07,253 INFO L93 Difference]: Finished difference Result 1670 states and 4460 transitions. [2021-08-21 12:01:07,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:01:07,254 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:07,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:07,256 INFO L225 Difference]: With dead ends: 1670 [2021-08-21 12:01:07,256 INFO L226 Difference]: Without dead ends: 1670 [2021-08-21 12:01:07,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:01:07,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-08-21 12:01:07,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1356. [2021-08-21 12:01:07,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 2.8656826568265683) internal successors, (3883), 1355 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:07,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 3883 transitions. [2021-08-21 12:01:07,273 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 3883 transitions. Word has length 19 [2021-08-21 12:01:07,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:07,273 INFO L470 AbstractCegarLoop]: Abstraction has 1356 states and 3883 transitions. [2021-08-21 12:01:07,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:07,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 3883 transitions. [2021-08-21 12:01:07,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:07,275 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:07,275 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:07,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-08-21 12:01:07,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:07,493 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:07,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:07,493 INFO L82 PathProgramCache]: Analyzing trace with hash -754504880, now seen corresponding path program 116 times [2021-08-21 12:01:07,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:07,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563287378] [2021-08-21 12:01:07,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:07,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:07,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:07,560 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:07,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:07,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563287378] [2021-08-21 12:01:07,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563287378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:07,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441556765] [2021-08-21 12:01:07,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:01:07,560 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:07,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:07,561 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:07,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-21 12:01:08,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:01:08,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:08,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:08,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:08,296 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:08,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441556765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:08,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:08,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:01:08,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111975572] [2021-08-21 12:01:08,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:01:08,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:08,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:01:08,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:01:08,298 INFO L87 Difference]: Start difference. First operand 1356 states and 3883 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:08,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:08,468 INFO L93 Difference]: Finished difference Result 1913 states and 5226 transitions. [2021-08-21 12:01:08,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:01:08,468 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:08,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:08,471 INFO L225 Difference]: With dead ends: 1913 [2021-08-21 12:01:08,471 INFO L226 Difference]: Without dead ends: 1913 [2021-08-21 12:01:08,471 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 148.4ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:01:08,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-08-21 12:01:08,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1595. [2021-08-21 12:01:08,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 2.9234629861982433) internal successors, (4660), 1594 states have internal predecessors, (4660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:08,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 4660 transitions. [2021-08-21 12:01:08,489 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 4660 transitions. Word has length 19 [2021-08-21 12:01:08,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:08,489 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 4660 transitions. [2021-08-21 12:01:08,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:08,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 4660 transitions. [2021-08-21 12:01:08,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:08,491 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:08,491 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:08,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:08,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:08,705 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:08,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:08,705 INFO L82 PathProgramCache]: Analyzing trace with hash -2055253982, now seen corresponding path program 117 times [2021-08-21 12:01:08,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:08,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526237137] [2021-08-21 12:01:08,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:08,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:08,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:08,761 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:08,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:08,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526237137] [2021-08-21 12:01:08,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526237137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:08,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875228578] [2021-08-21 12:01:08,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:01:08,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:08,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:08,770 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:08,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-21 12:01:09,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:01:09,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:09,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:09,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:09,523 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:09,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875228578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:09,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:09,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 12:01:09,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059455852] [2021-08-21 12:01:09,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:01:09,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:09,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:01:09,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:01:09,524 INFO L87 Difference]: Start difference. First operand 1595 states and 4660 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:09,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:09,681 INFO L93 Difference]: Finished difference Result 1806 states and 5001 transitions. [2021-08-21 12:01:09,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:01:09,681 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:09,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:09,684 INFO L225 Difference]: With dead ends: 1806 [2021-08-21 12:01:09,684 INFO L226 Difference]: Without dead ends: 1800 [2021-08-21 12:01:09,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:01:09,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2021-08-21 12:01:09,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 1627. [2021-08-21 12:01:09,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 2.9298892988929888) internal successors, (4764), 1626 states have internal predecessors, (4764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:09,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 4764 transitions. [2021-08-21 12:01:09,704 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 4764 transitions. Word has length 19 [2021-08-21 12:01:09,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:09,704 INFO L470 AbstractCegarLoop]: Abstraction has 1627 states and 4764 transitions. [2021-08-21 12:01:09,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:09,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 4764 transitions. [2021-08-21 12:01:09,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:09,706 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:09,706 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:09,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:09,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:09,923 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:09,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:09,923 INFO L82 PathProgramCache]: Analyzing trace with hash -267871544, now seen corresponding path program 118 times [2021-08-21 12:01:09,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:09,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396159179] [2021-08-21 12:01:09,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:09,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:09,979 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:09,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:09,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396159179] [2021-08-21 12:01:09,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396159179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:09,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682872534] [2021-08-21 12:01:09,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:01:09,979 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:09,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:09,980 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:09,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-21 12:01:10,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:01:10,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:10,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:10,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:10,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682872534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:10,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:10,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 12:01:10,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266393160] [2021-08-21 12:01:10,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:01:10,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:10,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:01:10,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:01:10,721 INFO L87 Difference]: Start difference. First operand 1627 states and 4764 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:10,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:10,776 INFO L93 Difference]: Finished difference Result 1860 states and 5210 transitions. [2021-08-21 12:01:10,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:01:10,776 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:10,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:10,779 INFO L225 Difference]: With dead ends: 1860 [2021-08-21 12:01:10,779 INFO L226 Difference]: Without dead ends: 1860 [2021-08-21 12:01:10,779 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:01:10,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-08-21 12:01:10,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1626. [2021-08-21 12:01:10,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1625 states have (on average 2.92) internal successors, (4745), 1625 states have internal predecessors, (4745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:10,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 4745 transitions. [2021-08-21 12:01:10,799 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 4745 transitions. Word has length 19 [2021-08-21 12:01:10,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:10,799 INFO L470 AbstractCegarLoop]: Abstraction has 1626 states and 4745 transitions. [2021-08-21 12:01:10,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:10,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 4745 transitions. [2021-08-21 12:01:10,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:10,801 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:10,801 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:10,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-08-21 12:01:11,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:11,018 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:11,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:11,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1340956924, now seen corresponding path program 119 times [2021-08-21 12:01:11,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:11,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163099186] [2021-08-21 12:01:11,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:11,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:11,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:11,080 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:11,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:11,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163099186] [2021-08-21 12:01:11,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163099186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:11,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939836899] [2021-08-21 12:01:11,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:01:11,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:11,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:11,081 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:11,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-21 12:01:11,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:01:11,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:11,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:11,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:11,855 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:11,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939836899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:11,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:11,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:01:11,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78655961] [2021-08-21 12:01:11,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:01:11,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:11,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:01:11,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:01:11,856 INFO L87 Difference]: Start difference. First operand 1626 states and 4745 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:11,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:11,958 INFO L93 Difference]: Finished difference Result 1918 states and 5335 transitions. [2021-08-21 12:01:11,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:01:11,958 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:11,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:11,960 INFO L225 Difference]: With dead ends: 1918 [2021-08-21 12:01:11,960 INFO L226 Difference]: Without dead ends: 1918 [2021-08-21 12:01:11,960 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:01:11,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-08-21 12:01:11,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1365. [2021-08-21 12:01:11,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1364 states have (on average 2.87316715542522) internal successors, (3919), 1364 states have internal predecessors, (3919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:11,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 3919 transitions. [2021-08-21 12:01:11,978 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 3919 transitions. Word has length 19 [2021-08-21 12:01:11,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:11,978 INFO L470 AbstractCegarLoop]: Abstraction has 1365 states and 3919 transitions. [2021-08-21 12:01:11,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:11,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 3919 transitions. [2021-08-21 12:01:11,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:11,980 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:11,980 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:11,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:12,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-21 12:01:12,194 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:12,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:12,194 INFO L82 PathProgramCache]: Analyzing trace with hash -246865336, now seen corresponding path program 120 times [2021-08-21 12:01:12,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:12,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055528977] [2021-08-21 12:01:12,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:12,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:12,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:12,264 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:12,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:12,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055528977] [2021-08-21 12:01:12,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055528977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:12,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671911807] [2021-08-21 12:01:12,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:01:12,265 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:12,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:12,265 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:12,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-21 12:01:13,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:01:13,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:13,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:13,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:13,056 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:13,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671911807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:13,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:13,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:01:13,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279926256] [2021-08-21 12:01:13,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:01:13,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:13,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:01:13,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:01:13,057 INFO L87 Difference]: Start difference. First operand 1365 states and 3919 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:13,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:13,221 INFO L93 Difference]: Finished difference Result 1928 states and 5195 transitions. [2021-08-21 12:01:13,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:01:13,222 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:13,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:13,224 INFO L225 Difference]: With dead ends: 1928 [2021-08-21 12:01:13,224 INFO L226 Difference]: Without dead ends: 1928 [2021-08-21 12:01:13,224 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 141.7ms TimeCoverageRelationStatistics Valid=220, Invalid=430, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:01:13,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-08-21 12:01:13,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1338. [2021-08-21 12:01:13,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 2.8855646970830215) internal successors, (3858), 1337 states have internal predecessors, (3858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:13,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 3858 transitions. [2021-08-21 12:01:13,241 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 3858 transitions. Word has length 19 [2021-08-21 12:01:13,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:13,241 INFO L470 AbstractCegarLoop]: Abstraction has 1338 states and 3858 transitions. [2021-08-21 12:01:13,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:13,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 3858 transitions. [2021-08-21 12:01:13,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:13,242 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:13,242 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:13,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:13,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-21 12:01:13,461 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:13,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:13,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1512322108, now seen corresponding path program 121 times [2021-08-21 12:01:13,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:13,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932325311] [2021-08-21 12:01:13,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:13,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:13,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:13,513 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:13,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:13,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932325311] [2021-08-21 12:01:13,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932325311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:13,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783673436] [2021-08-21 12:01:13,514 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:01:13,514 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:13,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:13,514 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:13,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-21 12:01:14,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:14,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:14,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:14,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783673436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:14,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:14,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:01:14,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308706628] [2021-08-21 12:01:14,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:14,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:14,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:14,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:14,261 INFO L87 Difference]: Start difference. First operand 1338 states and 3858 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:14,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:14,373 INFO L93 Difference]: Finished difference Result 1470 states and 4019 transitions. [2021-08-21 12:01:14,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:01:14,374 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:14,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:14,376 INFO L225 Difference]: With dead ends: 1470 [2021-08-21 12:01:14,376 INFO L226 Difference]: Without dead ends: 1466 [2021-08-21 12:01:14,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:01:14,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2021-08-21 12:01:14,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 1333. [2021-08-21 12:01:14,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 1332 states have (on average 2.8813813813813813) internal successors, (3838), 1332 states have internal predecessors, (3838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:14,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 3838 transitions. [2021-08-21 12:01:14,391 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 3838 transitions. Word has length 19 [2021-08-21 12:01:14,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:14,391 INFO L470 AbstractCegarLoop]: Abstraction has 1333 states and 3838 transitions. [2021-08-21 12:01:14,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:14,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 3838 transitions. [2021-08-21 12:01:14,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:14,393 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:14,394 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:14,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:14,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:14,599 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:14,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:14,599 INFO L82 PathProgramCache]: Analyzing trace with hash -671176572, now seen corresponding path program 122 times [2021-08-21 12:01:14,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:14,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675149978] [2021-08-21 12:01:14,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:14,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:14,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:14,663 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:14,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:14,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675149978] [2021-08-21 12:01:14,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675149978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:14,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320239248] [2021-08-21 12:01:14,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:01:14,663 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:14,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:14,664 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:14,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-21 12:01:15,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:01:15,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:15,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:15,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:15,506 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:15,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320239248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:15,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:15,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 12:01:15,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79109716] [2021-08-21 12:01:15,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:01:15,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:15,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:01:15,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:01:15,507 INFO L87 Difference]: Start difference. First operand 1333 states and 3838 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:15,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:15,659 INFO L93 Difference]: Finished difference Result 1575 states and 4227 transitions. [2021-08-21 12:01:15,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:01:15,659 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 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 19 [2021-08-21 12:01:15,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:15,661 INFO L225 Difference]: With dead ends: 1575 [2021-08-21 12:01:15,661 INFO L226 Difference]: Without dead ends: 1575 [2021-08-21 12:01:15,662 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 129.9ms TimeCoverageRelationStatistics Valid=223, Invalid=427, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:01:15,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-08-21 12:01:15,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1174. [2021-08-21 12:01:15,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 2.8533674339300936) internal successors, (3347), 1173 states have internal predecessors, (3347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:15,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 3347 transitions. [2021-08-21 12:01:15,675 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 3347 transitions. Word has length 19 [2021-08-21 12:01:15,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:15,676 INFO L470 AbstractCegarLoop]: Abstraction has 1174 states and 3347 transitions. [2021-08-21 12:01:15,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:15,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 3347 transitions. [2021-08-21 12:01:15,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:15,685 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:15,685 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:15,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:15,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-21 12:01:15,903 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:15,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:15,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1276138466, now seen corresponding path program 123 times [2021-08-21 12:01:15,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:15,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360528196] [2021-08-21 12:01:15,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:15,904 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:15,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:15,960 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:15,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:15,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360528196] [2021-08-21 12:01:15,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360528196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:15,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724046939] [2021-08-21 12:01:15,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:01:15,961 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:15,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:15,961 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:15,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-21 12:01:16,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:01:16,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:16,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:16,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:16,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724046939] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:16,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:16,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:01:16,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020765894] [2021-08-21 12:01:16,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:16,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:16,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:16,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:16,752 INFO L87 Difference]: Start difference. First operand 1174 states and 3347 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:16,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:16,850 INFO L93 Difference]: Finished difference Result 1329 states and 3554 transitions. [2021-08-21 12:01:16,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:01:16,851 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:16,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:16,852 INFO L225 Difference]: With dead ends: 1329 [2021-08-21 12:01:16,852 INFO L226 Difference]: Without dead ends: 1325 [2021-08-21 12:01:16,852 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:01:16,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2021-08-21 12:01:16,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1184. [2021-08-21 12:01:16,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 2.8546069315300087) internal successors, (3377), 1183 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:16,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 3377 transitions. [2021-08-21 12:01:16,866 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 3377 transitions. Word has length 19 [2021-08-21 12:01:16,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:16,866 INFO L470 AbstractCegarLoop]: Abstraction has 1184 states and 3377 transitions. [2021-08-21 12:01:16,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:16,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 3377 transitions. [2021-08-21 12:01:16,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:16,867 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:16,867 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:16,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:17,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-08-21 12:01:17,085 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:17,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:17,085 INFO L82 PathProgramCache]: Analyzing trace with hash -442205240, now seen corresponding path program 124 times [2021-08-21 12:01:17,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:17,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175891232] [2021-08-21 12:01:17,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:17,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:17,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:17,135 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:17,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:17,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175891232] [2021-08-21 12:01:17,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175891232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:17,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161004386] [2021-08-21 12:01:17,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:01:17,136 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:17,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:17,137 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:17,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-21 12:01:17,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:01:17,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:17,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:17,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:17,925 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:17,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161004386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:17,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:17,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:01:17,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630623686] [2021-08-21 12:01:17,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:17,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:17,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:17,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:17,926 INFO L87 Difference]: Start difference. First operand 1184 states and 3377 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:17,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:17,989 INFO L93 Difference]: Finished difference Result 1412 states and 3742 transitions. [2021-08-21 12:01:17,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:01:17,989 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:17,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:17,991 INFO L225 Difference]: With dead ends: 1412 [2021-08-21 12:01:17,991 INFO L226 Difference]: Without dead ends: 1412 [2021-08-21 12:01:17,991 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:01:17,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2021-08-21 12:01:18,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1185. [2021-08-21 12:01:18,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 1184 states have (on average 2.85472972972973) internal successors, (3380), 1184 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:18,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 3380 transitions. [2021-08-21 12:01:18,005 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 3380 transitions. Word has length 19 [2021-08-21 12:01:18,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:18,005 INFO L470 AbstractCegarLoop]: Abstraction has 1185 states and 3380 transitions. [2021-08-21 12:01:18,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:18,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 3380 transitions. [2021-08-21 12:01:18,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:18,006 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:18,006 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:18,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:18,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-08-21 12:01:18,224 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:18,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:18,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1268408068, now seen corresponding path program 125 times [2021-08-21 12:01:18,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:18,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089944797] [2021-08-21 12:01:18,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:18,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:18,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:18,293 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:18,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:18,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089944797] [2021-08-21 12:01:18,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089944797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:18,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880873592] [2021-08-21 12:01:18,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:01:18,294 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:18,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:18,294 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:18,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-21 12:01:19,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:01:19,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:19,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:19,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:19,088 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:19,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880873592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:19,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:19,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 12:01:19,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204673609] [2021-08-21 12:01:19,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:01:19,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:19,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:01:19,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:01:19,089 INFO L87 Difference]: Start difference. First operand 1185 states and 3380 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:19,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:19,173 INFO L93 Difference]: Finished difference Result 1432 states and 3782 transitions. [2021-08-21 12:01:19,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:01:19,173 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:19,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:19,175 INFO L225 Difference]: With dead ends: 1432 [2021-08-21 12:01:19,175 INFO L226 Difference]: Without dead ends: 1432 [2021-08-21 12:01:19,175 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:01:19,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2021-08-21 12:01:19,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1186. [2021-08-21 12:01:19,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 1185 states have (on average 2.8548523206751053) internal successors, (3383), 1185 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:19,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 3383 transitions. [2021-08-21 12:01:19,189 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 3383 transitions. Word has length 19 [2021-08-21 12:01:19,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:19,189 INFO L470 AbstractCegarLoop]: Abstraction has 1186 states and 3383 transitions. [2021-08-21 12:01:19,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:19,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 3383 transitions. [2021-08-21 12:01:19,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:19,190 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:19,190 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:19,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:19,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-08-21 12:01:19,408 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:19,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:19,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1537154232, now seen corresponding path program 126 times [2021-08-21 12:01:19,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:19,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031067775] [2021-08-21 12:01:19,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:19,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:19,474 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:19,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:19,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031067775] [2021-08-21 12:01:19,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031067775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:19,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239682096] [2021-08-21 12:01:19,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:01:19,475 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:19,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:19,476 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:19,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-21 12:01:20,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:01:20,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:20,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:20,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:20,327 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:20,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239682096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:20,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:20,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 12:01:20,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080929657] [2021-08-21 12:01:20,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:01:20,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:20,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:01:20,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:01:20,328 INFO L87 Difference]: Start difference. First operand 1186 states and 3383 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:20,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:20,413 INFO L93 Difference]: Finished difference Result 1396 states and 3706 transitions. [2021-08-21 12:01:20,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:01:20,413 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:20,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:20,415 INFO L225 Difference]: With dead ends: 1396 [2021-08-21 12:01:20,415 INFO L226 Difference]: Without dead ends: 1396 [2021-08-21 12:01:20,415 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:01:20,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2021-08-21 12:01:20,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1179. [2021-08-21 12:01:20,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1178 states have (on average 2.8556876061120544) internal successors, (3364), 1178 states have internal predecessors, (3364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:20,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 3364 transitions. [2021-08-21 12:01:20,443 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 3364 transitions. Word has length 19 [2021-08-21 12:01:20,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:20,443 INFO L470 AbstractCegarLoop]: Abstraction has 1179 states and 3364 transitions. [2021-08-21 12:01:20,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:20,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 3364 transitions. [2021-08-21 12:01:20,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:20,444 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:20,444 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:20,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:20,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:20,678 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:20,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:20,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1684727684, now seen corresponding path program 127 times [2021-08-21 12:01:20,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:20,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568305291] [2021-08-21 12:01:20,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:20,679 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:20,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:20,773 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:20,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:20,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568305291] [2021-08-21 12:01:20,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568305291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:20,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328448721] [2021-08-21 12:01:20,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:01:20,774 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:20,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:20,774 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:20,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-21 12:01:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:21,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:21,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:21,654 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:21,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328448721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:21,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:21,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 12:01:21,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370492870] [2021-08-21 12:01:21,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:01:21,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:21,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:01:21,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:01:21,656 INFO L87 Difference]: Start difference. First operand 1179 states and 3364 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:21,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:21,752 INFO L93 Difference]: Finished difference Result 1599 states and 4313 transitions. [2021-08-21 12:01:21,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:01:21,763 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:21,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:21,765 INFO L225 Difference]: With dead ends: 1599 [2021-08-21 12:01:21,765 INFO L226 Difference]: Without dead ends: 1599 [2021-08-21 12:01:21,765 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 124.4ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:01:21,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-08-21 12:01:21,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1388. [2021-08-21 12:01:21,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 2.8716654650324442) internal successors, (3983), 1387 states have internal predecessors, (3983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:21,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 3983 transitions. [2021-08-21 12:01:21,780 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 3983 transitions. Word has length 19 [2021-08-21 12:01:21,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:21,780 INFO L470 AbstractCegarLoop]: Abstraction has 1388 states and 3983 transitions. [2021-08-21 12:01:21,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:21,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 3983 transitions. [2021-08-21 12:01:21,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:21,797 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:21,797 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:21,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2021-08-21 12:01:21,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:21,997 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:21,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:21,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1516148024, now seen corresponding path program 128 times [2021-08-21 12:01:21,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:21,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482760252] [2021-08-21 12:01:21,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:21,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:22,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:22,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:22,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482760252] [2021-08-21 12:01:22,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482760252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:22,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361425072] [2021-08-21 12:01:22,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:01:22,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:22,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:22,069 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:22,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-21 12:01:22,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:01:22,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:22,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:22,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:22,884 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:22,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361425072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:22,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:22,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 12:01:22,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144473239] [2021-08-21 12:01:22,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:01:22,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:22,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:01:22,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:01:22,885 INFO L87 Difference]: Start difference. First operand 1388 states and 3983 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:23,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:23,016 INFO L93 Difference]: Finished difference Result 1614 states and 4338 transitions. [2021-08-21 12:01:23,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:01:23,017 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 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 19 [2021-08-21 12:01:23,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:23,018 INFO L225 Difference]: With dead ends: 1614 [2021-08-21 12:01:23,018 INFO L226 Difference]: Without dead ends: 1614 [2021-08-21 12:01:23,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:01:23,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-08-21 12:01:23,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1388. [2021-08-21 12:01:23,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 2.8716654650324442) internal successors, (3983), 1387 states have internal predecessors, (3983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:23,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 3983 transitions. [2021-08-21 12:01:23,034 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 3983 transitions. Word has length 19 [2021-08-21 12:01:23,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:23,034 INFO L470 AbstractCegarLoop]: Abstraction has 1388 states and 3983 transitions. [2021-08-21 12:01:23,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:23,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 3983 transitions. [2021-08-21 12:01:23,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:23,036 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:23,036 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:23,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:23,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-08-21 12:01:23,256 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:23,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:23,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1959047164, now seen corresponding path program 129 times [2021-08-21 12:01:23,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:23,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616216852] [2021-08-21 12:01:23,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:23,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:23,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:23,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616216852] [2021-08-21 12:01:23,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616216852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:23,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432982306] [2021-08-21 12:01:23,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:01:23,325 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:23,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:23,325 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:23,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-21 12:01:24,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:01:24,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:24,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:24,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:24,160 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:24,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432982306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:24,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:24,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 12:01:24,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746354382] [2021-08-21 12:01:24,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:01:24,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:24,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:01:24,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:01:24,161 INFO L87 Difference]: Start difference. First operand 1388 states and 3983 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:24,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:24,378 INFO L93 Difference]: Finished difference Result 1806 states and 4873 transitions. [2021-08-21 12:01:24,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:01:24,379 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 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 19 [2021-08-21 12:01:24,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:24,381 INFO L225 Difference]: With dead ends: 1806 [2021-08-21 12:01:24,381 INFO L226 Difference]: Without dead ends: 1806 [2021-08-21 12:01:24,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 179.4ms TimeCoverageRelationStatistics Valid=293, Invalid=577, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:01:24,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2021-08-21 12:01:24,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1517. [2021-08-21 12:01:24,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 2.888522427440633) internal successors, (4379), 1516 states have internal predecessors, (4379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:24,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 4379 transitions. [2021-08-21 12:01:24,398 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 4379 transitions. Word has length 19 [2021-08-21 12:01:24,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:24,398 INFO L470 AbstractCegarLoop]: Abstraction has 1517 states and 4379 transitions. [2021-08-21 12:01:24,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:24,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 4379 transitions. [2021-08-21 12:01:24,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:24,400 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:24,400 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:24,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:24,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:24,618 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:24,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:24,618 INFO L82 PathProgramCache]: Analyzing trace with hash 796669994, now seen corresponding path program 130 times [2021-08-21 12:01:24,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:24,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837078099] [2021-08-21 12:01:24,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:24,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:24,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:24,687 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:24,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:24,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837078099] [2021-08-21 12:01:24,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837078099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:24,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570628619] [2021-08-21 12:01:24,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:01:24,687 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:24,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:24,688 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:24,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-21 12:01:25,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:01:25,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:25,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:25,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:25,492 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:25,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570628619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:25,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:25,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:01:25,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223107432] [2021-08-21 12:01:25,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:01:25,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:25,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:01:25,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:01:25,493 INFO L87 Difference]: Start difference. First operand 1517 states and 4379 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:25,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:25,665 INFO L93 Difference]: Finished difference Result 1698 states and 4626 transitions. [2021-08-21 12:01:25,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:01:25,666 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:25,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:25,668 INFO L225 Difference]: With dead ends: 1698 [2021-08-21 12:01:25,668 INFO L226 Difference]: Without dead ends: 1692 [2021-08-21 12:01:25,668 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 130.8ms TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:01:25,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-08-21 12:01:25,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1483. [2021-08-21 12:01:25,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 2.8711201079622133) internal successors, (4255), 1482 states have internal predecessors, (4255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:25,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 4255 transitions. [2021-08-21 12:01:25,686 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 4255 transitions. Word has length 19 [2021-08-21 12:01:25,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:25,686 INFO L470 AbstractCegarLoop]: Abstraction has 1483 states and 4255 transitions. [2021-08-21 12:01:25,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:25,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 4255 transitions. [2021-08-21 12:01:25,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:25,688 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:25,688 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:25,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:25,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:25,906 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:25,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:25,906 INFO L82 PathProgramCache]: Analyzing trace with hash 241684364, now seen corresponding path program 131 times [2021-08-21 12:01:25,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:25,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588012686] [2021-08-21 12:01:25,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:25,907 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:25,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:25,968 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:25,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:25,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588012686] [2021-08-21 12:01:25,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588012686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:25,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258658736] [2021-08-21 12:01:25,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:01:25,969 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:25,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:25,969 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:25,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-21 12:01:26,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:01:26,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:26,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:26,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:26,835 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:26,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258658736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:26,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:26,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 12:01:26,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977649381] [2021-08-21 12:01:26,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:01:26,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:26,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:01:26,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:01:26,836 INFO L87 Difference]: Start difference. First operand 1483 states and 4255 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:26,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:26,899 INFO L93 Difference]: Finished difference Result 1685 states and 4697 transitions. [2021-08-21 12:01:26,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:01:26,900 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:26,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:26,902 INFO L225 Difference]: With dead ends: 1685 [2021-08-21 12:01:26,902 INFO L226 Difference]: Without dead ends: 1685 [2021-08-21 12:01:26,902 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:01:26,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2021-08-21 12:01:26,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 1550. [2021-08-21 12:01:26,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 2.8773402194964492) internal successors, (4457), 1549 states have internal predecessors, (4457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:26,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 4457 transitions. [2021-08-21 12:01:26,919 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 4457 transitions. Word has length 19 [2021-08-21 12:01:26,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:26,919 INFO L470 AbstractCegarLoop]: Abstraction has 1550 states and 4457 transitions. [2021-08-21 12:01:26,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:26,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 4457 transitions. [2021-08-21 12:01:26,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:26,921 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:26,921 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:26,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:27,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-21 12:01:27,139 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:27,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:27,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1335775952, now seen corresponding path program 132 times [2021-08-21 12:01:27,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:27,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234613611] [2021-08-21 12:01:27,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:27,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:27,211 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:27,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:27,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234613611] [2021-08-21 12:01:27,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234613611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:27,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761989992] [2021-08-21 12:01:27,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:01:27,212 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:27,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:27,213 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:27,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-21 12:01:28,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:01:28,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:28,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:28,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:28,056 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:28,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761989992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:28,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:28,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 12:01:28,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083498635] [2021-08-21 12:01:28,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:01:28,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:28,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:01:28,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:01:28,057 INFO L87 Difference]: Start difference. First operand 1550 states and 4457 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:28,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:28,174 INFO L93 Difference]: Finished difference Result 1699 states and 4710 transitions. [2021-08-21 12:01:28,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:01:28,174 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:28,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:28,176 INFO L225 Difference]: With dead ends: 1699 [2021-08-21 12:01:28,176 INFO L226 Difference]: Without dead ends: 1699 [2021-08-21 12:01:28,176 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:01:28,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2021-08-21 12:01:28,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1461. [2021-08-21 12:01:28,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1460 states have (on average 2.8636986301369864) internal successors, (4181), 1460 states have internal predecessors, (4181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:28,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 4181 transitions. [2021-08-21 12:01:28,193 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 4181 transitions. Word has length 19 [2021-08-21 12:01:28,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:28,193 INFO L470 AbstractCegarLoop]: Abstraction has 1461 states and 4181 transitions. [2021-08-21 12:01:28,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:28,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 4181 transitions. [2021-08-21 12:01:28,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:28,194 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:28,194 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:28,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:28,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-21 12:01:28,410 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:28,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:28,410 INFO L82 PathProgramCache]: Analyzing trace with hash 892876812, now seen corresponding path program 133 times [2021-08-21 12:01:28,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:28,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068458372] [2021-08-21 12:01:28,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:28,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:28,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:28,480 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:28,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:28,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068458372] [2021-08-21 12:01:28,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068458372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:28,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987459779] [2021-08-21 12:01:28,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:01:28,480 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:28,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:28,481 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:28,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-21 12:01:29,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:29,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:29,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:29,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987459779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:29,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:29,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 12:01:29,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098885934] [2021-08-21 12:01:29,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:01:29,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:29,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:01:29,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:01:29,349 INFO L87 Difference]: Start difference. First operand 1461 states and 4181 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:29,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:29,572 INFO L93 Difference]: Finished difference Result 1837 states and 5008 transitions. [2021-08-21 12:01:29,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:01:29,573 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:29,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:29,575 INFO L225 Difference]: With dead ends: 1837 [2021-08-21 12:01:29,575 INFO L226 Difference]: Without dead ends: 1837 [2021-08-21 12:01:29,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 187.1ms TimeCoverageRelationStatistics Valid=292, Invalid=578, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:01:29,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1837 states. [2021-08-21 12:01:29,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1837 to 1438. [2021-08-21 12:01:29,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1437 states have (on average 2.8656924147529574) internal successors, (4118), 1437 states have internal predecessors, (4118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:29,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 4118 transitions. [2021-08-21 12:01:29,593 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 4118 transitions. Word has length 19 [2021-08-21 12:01:29,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:29,593 INFO L470 AbstractCegarLoop]: Abstraction has 1438 states and 4118 transitions. [2021-08-21 12:01:29,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:29,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 4118 transitions. [2021-08-21 12:01:29,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:29,594 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:29,595 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:29,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:29,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-21 12:01:29,809 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:29,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:29,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1070855440, now seen corresponding path program 134 times [2021-08-21 12:01:29,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:29,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196868933] [2021-08-21 12:01:29,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:29,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:29,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:29,871 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:29,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:29,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196868933] [2021-08-21 12:01:29,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196868933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:29,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316079591] [2021-08-21 12:01:29,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:01:29,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:29,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:29,872 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:29,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-21 12:01:30,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:01:30,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:30,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:30,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:30,739 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:30,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316079591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:30,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:30,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 12:01:30,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622542074] [2021-08-21 12:01:30,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:01:30,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:30,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:01:30,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:01:30,740 INFO L87 Difference]: Start difference. First operand 1438 states and 4118 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:30,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:30,868 INFO L93 Difference]: Finished difference Result 1561 states and 4269 transitions. [2021-08-21 12:01:30,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:01:30,868 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:30,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:30,870 INFO L225 Difference]: With dead ends: 1561 [2021-08-21 12:01:30,870 INFO L226 Difference]: Without dead ends: 1557 [2021-08-21 12:01:30,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 98.5ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:01:30,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1557 states. [2021-08-21 12:01:30,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1557 to 1438. [2021-08-21 12:01:30,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1437 states have (on average 2.8636047320807236) internal successors, (4115), 1437 states have internal predecessors, (4115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:30,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 4115 transitions. [2021-08-21 12:01:30,886 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 4115 transitions. Word has length 19 [2021-08-21 12:01:30,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:30,886 INFO L470 AbstractCegarLoop]: Abstraction has 1438 states and 4115 transitions. [2021-08-21 12:01:30,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:30,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 4115 transitions. [2021-08-21 12:01:30,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:30,887 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:30,887 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:30,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:31,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:31,105 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:31,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:31,106 INFO L82 PathProgramCache]: Analyzing trace with hash 624130384, now seen corresponding path program 135 times [2021-08-21 12:01:31,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:31,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639913597] [2021-08-21 12:01:31,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:31,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:31,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:31,181 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:31,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:31,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639913597] [2021-08-21 12:01:31,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639913597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:31,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042642254] [2021-08-21 12:01:31,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:01:31,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:31,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:31,183 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:31,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-21 12:01:31,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:01:31,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:31,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:31,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:32,012 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:32,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042642254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:32,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:32,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 12:01:32,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802782588] [2021-08-21 12:01:32,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:01:32,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:32,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:01:32,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:01:32,013 INFO L87 Difference]: Start difference. First operand 1438 states and 4115 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:32,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:32,194 INFO L93 Difference]: Finished difference Result 1834 states and 5041 transitions. [2021-08-21 12:01:32,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:01:32,195 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:32,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:32,197 INFO L225 Difference]: With dead ends: 1834 [2021-08-21 12:01:32,197 INFO L226 Difference]: Without dead ends: 1834 [2021-08-21 12:01:32,197 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 163.5ms TimeCoverageRelationStatistics Valid=255, Invalid=501, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:01:32,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1834 states. [2021-08-21 12:01:32,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1834 to 1639. [2021-08-21 12:01:32,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1639 states, 1638 states have (on average 2.885225885225885) internal successors, (4726), 1638 states have internal predecessors, (4726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:32,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1639 states to 1639 states and 4726 transitions. [2021-08-21 12:01:32,215 INFO L78 Accepts]: Start accepts. Automaton has 1639 states and 4726 transitions. Word has length 19 [2021-08-21 12:01:32,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:32,216 INFO L470 AbstractCegarLoop]: Abstraction has 1639 states and 4726 transitions. [2021-08-21 12:01:32,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:32,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1639 states and 4726 transitions. [2021-08-21 12:01:32,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:32,217 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:32,217 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:32,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:32,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-08-21 12:01:32,436 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:32,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:32,436 INFO L82 PathProgramCache]: Analyzing trace with hash -859962518, now seen corresponding path program 136 times [2021-08-21 12:01:32,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:32,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851476106] [2021-08-21 12:01:32,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:32,436 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:32,491 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:32,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:32,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851476106] [2021-08-21 12:01:32,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851476106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:32,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988173655] [2021-08-21 12:01:32,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:01:32,492 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:32,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:32,493 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:32,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-21 12:01:33,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:01:33,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:33,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:33,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:33,340 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:33,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988173655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:33,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:33,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:01:33,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420827900] [2021-08-21 12:01:33,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:33,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:33,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:33,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:33,341 INFO L87 Difference]: Start difference. First operand 1639 states and 4726 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:33,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:33,456 INFO L93 Difference]: Finished difference Result 1758 states and 4884 transitions. [2021-08-21 12:01:33,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:01:33,456 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:33,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:33,458 INFO L225 Difference]: With dead ends: 1758 [2021-08-21 12:01:33,458 INFO L226 Difference]: Without dead ends: 1756 [2021-08-21 12:01:33,458 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:01:33,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-08-21 12:01:33,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1651. [2021-08-21 12:01:33,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 2.887272727272727) internal successors, (4764), 1650 states have internal predecessors, (4764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:33,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 4764 transitions. [2021-08-21 12:01:33,503 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 4764 transitions. Word has length 19 [2021-08-21 12:01:33,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:33,503 INFO L470 AbstractCegarLoop]: Abstraction has 1651 states and 4764 transitions. [2021-08-21 12:01:33,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:33,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 4764 transitions. [2021-08-21 12:01:33,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:33,505 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:33,505 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:33,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:33,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-08-21 12:01:33,721 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:33,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:33,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1716661072, now seen corresponding path program 137 times [2021-08-21 12:01:33,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:33,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595038816] [2021-08-21 12:01:33,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:33,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:33,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:33,776 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:33,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:33,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595038816] [2021-08-21 12:01:33,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595038816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:33,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141535456] [2021-08-21 12:01:33,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:01:33,776 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:33,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:33,777 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:33,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-21 12:01:34,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:01:34,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:34,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:34,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:34,642 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:34,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141535456] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:34,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:34,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:01:34,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156655010] [2021-08-21 12:01:34,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:34,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:34,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:34,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:34,643 INFO L87 Difference]: Start difference. First operand 1651 states and 4764 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:34,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:34,715 INFO L93 Difference]: Finished difference Result 1820 states and 5026 transitions. [2021-08-21 12:01:34,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:01:34,716 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:34,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:34,718 INFO L225 Difference]: With dead ends: 1820 [2021-08-21 12:01:34,718 INFO L226 Difference]: Without dead ends: 1820 [2021-08-21 12:01:34,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:01:34,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1820 states. [2021-08-21 12:01:34,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1820 to 1652. [2021-08-21 12:01:34,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1652 states, 1651 states have (on average 2.886129618413083) internal successors, (4765), 1651 states have internal predecessors, (4765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:34,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1652 states to 1652 states and 4765 transitions. [2021-08-21 12:01:34,737 INFO L78 Accepts]: Start accepts. Automaton has 1652 states and 4765 transitions. Word has length 19 [2021-08-21 12:01:34,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:34,737 INFO L470 AbstractCegarLoop]: Abstraction has 1652 states and 4765 transitions. [2021-08-21 12:01:34,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:34,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1652 states and 4765 transitions. [2021-08-21 12:01:34,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:34,739 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:34,739 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:34,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:34,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:34,956 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:34,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:34,957 INFO L82 PathProgramCache]: Analyzing trace with hash -867692916, now seen corresponding path program 138 times [2021-08-21 12:01:34,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:34,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159238251] [2021-08-21 12:01:34,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:34,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:35,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:35,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159238251] [2021-08-21 12:01:35,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159238251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:35,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625619496] [2021-08-21 12:01:35,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:01:35,012 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:35,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:35,013 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:35,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-21 12:01:35,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:01:35,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:35,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:35,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:35,934 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:35,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625619496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:35,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:35,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 12:01:35,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959855888] [2021-08-21 12:01:35,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:01:35,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:35,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:01:35,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:01:35,934 INFO L87 Difference]: Start difference. First operand 1652 states and 4765 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:36,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:36,039 INFO L93 Difference]: Finished difference Result 1866 states and 5130 transitions. [2021-08-21 12:01:36,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:01:36,040 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:36,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:36,042 INFO L225 Difference]: With dead ends: 1866 [2021-08-21 12:01:36,042 INFO L226 Difference]: Without dead ends: 1866 [2021-08-21 12:01:36,042 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:01:36,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-08-21 12:01:36,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1654. [2021-08-21 12:01:36,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 2.8850574712643677) internal successors, (4769), 1653 states have internal predecessors, (4769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:36,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 4769 transitions. [2021-08-21 12:01:36,060 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 4769 transitions. Word has length 19 [2021-08-21 12:01:36,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:36,060 INFO L470 AbstractCegarLoop]: Abstraction has 1654 states and 4769 transitions. [2021-08-21 12:01:36,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:36,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 4769 transitions. [2021-08-21 12:01:36,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:36,062 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:36,062 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:36,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:36,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:36,268 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:36,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:36,268 INFO L82 PathProgramCache]: Analyzing trace with hash 621712080, now seen corresponding path program 139 times [2021-08-21 12:01:36,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:36,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780497868] [2021-08-21 12:01:36,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:36,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:36,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:36,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:36,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780497868] [2021-08-21 12:01:36,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780497868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:36,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974110985] [2021-08-21 12:01:36,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:01:36,342 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:36,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:36,343 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:36,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-21 12:01:37,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:37,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:37,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:37,275 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:37,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974110985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:37,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:37,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 12:01:37,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978776295] [2021-08-21 12:01:37,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:01:37,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:37,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:01:37,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:01:37,281 INFO L87 Difference]: Start difference. First operand 1654 states and 4769 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:37,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:37,423 INFO L93 Difference]: Finished difference Result 2070 states and 5717 transitions. [2021-08-21 12:01:37,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:01:37,423 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:37,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:37,425 INFO L225 Difference]: With dead ends: 2070 [2021-08-21 12:01:37,426 INFO L226 Difference]: Without dead ends: 2070 [2021-08-21 12:01:37,426 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 113.5ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:01:37,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2021-08-21 12:01:37,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 1849. [2021-08-21 12:01:37,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1848 states have (on average 2.9025974025974026) internal successors, (5364), 1848 states have internal predecessors, (5364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:37,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 5364 transitions. [2021-08-21 12:01:37,448 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 5364 transitions. Word has length 19 [2021-08-21 12:01:37,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:37,448 INFO L470 AbstractCegarLoop]: Abstraction has 1849 states and 5364 transitions. [2021-08-21 12:01:37,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:37,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 5364 transitions. [2021-08-21 12:01:37,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:37,450 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:37,450 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:37,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:37,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:37,652 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:37,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:37,652 INFO L82 PathProgramCache]: Analyzing trace with hash -451373300, now seen corresponding path program 140 times [2021-08-21 12:01:37,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:37,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95224050] [2021-08-21 12:01:37,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:37,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:37,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:37,732 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:37,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:37,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95224050] [2021-08-21 12:01:37,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95224050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:37,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923973765] [2021-08-21 12:01:37,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:01:37,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:37,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:37,734 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:37,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-21 12:01:38,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:01:38,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:38,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:38,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:38,626 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:38,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923973765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:38,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:38,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 12:01:38,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378435841] [2021-08-21 12:01:38,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:01:38,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:38,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:01:38,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:01:38,627 INFO L87 Difference]: Start difference. First operand 1849 states and 5364 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:38,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:38,733 INFO L93 Difference]: Finished difference Result 2024 states and 5619 transitions. [2021-08-21 12:01:38,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:01:38,733 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:38,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:38,735 INFO L225 Difference]: With dead ends: 2024 [2021-08-21 12:01:38,736 INFO L226 Difference]: Without dead ends: 2024 [2021-08-21 12:01:38,736 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 97.1ms TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:01:38,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2021-08-21 12:01:38,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 1830. [2021-08-21 12:01:38,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 1829 states have (on average 2.8983050847457625) internal successors, (5301), 1829 states have internal predecessors, (5301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:38,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 5301 transitions. [2021-08-21 12:01:38,755 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 5301 transitions. Word has length 19 [2021-08-21 12:01:38,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:38,755 INFO L470 AbstractCegarLoop]: Abstraction has 1830 states and 5301 transitions. [2021-08-21 12:01:38,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:38,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 5301 transitions. [2021-08-21 12:01:38,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:38,757 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:38,757 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:38,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:38,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:38,975 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:38,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:38,975 INFO L82 PathProgramCache]: Analyzing trace with hash 642718288, now seen corresponding path program 141 times [2021-08-21 12:01:38,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:38,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874847768] [2021-08-21 12:01:38,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:38,975 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:38,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:39,043 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:39,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:39,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874847768] [2021-08-21 12:01:39,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874847768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:39,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552357630] [2021-08-21 12:01:39,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:01:39,044 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:39,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:39,045 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:39,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-21 12:01:39,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:01:39,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:39,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:39,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:39,968 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:39,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552357630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:39,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:39,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 12:01:39,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587002074] [2021-08-21 12:01:39,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:01:39,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:39,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:01:39,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:01:39,969 INFO L87 Difference]: Start difference. First operand 1830 states and 5301 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:40,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:40,060 INFO L93 Difference]: Finished difference Result 2074 states and 5900 transitions. [2021-08-21 12:01:40,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:01:40,061 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:40,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:40,063 INFO L225 Difference]: With dead ends: 2074 [2021-08-21 12:01:40,063 INFO L226 Difference]: Without dead ends: 2074 [2021-08-21 12:01:40,063 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:01:40,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2021-08-21 12:01:40,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 1988. [2021-08-21 12:01:40,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 2.909914443885254) internal successors, (5782), 1987 states have internal predecessors, (5782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:40,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 5782 transitions. [2021-08-21 12:01:40,084 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 5782 transitions. Word has length 19 [2021-08-21 12:01:40,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:40,085 INFO L470 AbstractCegarLoop]: Abstraction has 1988 states and 5782 transitions. [2021-08-21 12:01:40,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:40,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 5782 transitions. [2021-08-21 12:01:40,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:40,087 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:40,087 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:40,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:40,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-21 12:01:40,301 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:40,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:40,301 INFO L82 PathProgramCache]: Analyzing trace with hash 199819148, now seen corresponding path program 142 times [2021-08-21 12:01:40,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:40,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358602866] [2021-08-21 12:01:40,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:40,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:40,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:40,385 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:40,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:40,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358602866] [2021-08-21 12:01:40,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358602866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:40,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441421457] [2021-08-21 12:01:40,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:01:40,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:40,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:40,386 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:40,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-21 12:01:41,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:01:41,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:41,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:41,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:41,284 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:41,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441421457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:41,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:41,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 12:01:41,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594147908] [2021-08-21 12:01:41,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:01:41,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:41,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:01:41,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:01:41,285 INFO L87 Difference]: Start difference. First operand 1988 states and 5782 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:41,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:41,434 INFO L93 Difference]: Finished difference Result 2115 states and 5998 transitions. [2021-08-21 12:01:41,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:01:41,435 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:41,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:41,437 INFO L225 Difference]: With dead ends: 2115 [2021-08-21 12:01:41,437 INFO L226 Difference]: Without dead ends: 2115 [2021-08-21 12:01:41,437 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 138.3ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:01:41,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2021-08-21 12:01:41,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1982. [2021-08-21 12:01:41,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1981 states have (on average 2.9091367995961637) internal successors, (5763), 1981 states have internal predecessors, (5763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:41,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 5763 transitions. [2021-08-21 12:01:41,461 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 5763 transitions. Word has length 19 [2021-08-21 12:01:41,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:41,461 INFO L470 AbstractCegarLoop]: Abstraction has 1982 states and 5763 transitions. [2021-08-21 12:01:41,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:41,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 5763 transitions. [2021-08-21 12:01:41,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:41,463 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:41,463 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:41,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:41,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-21 12:01:41,681 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:41,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:41,682 INFO L82 PathProgramCache]: Analyzing trace with hash -645152304, now seen corresponding path program 143 times [2021-08-21 12:01:41,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:41,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370584639] [2021-08-21 12:01:41,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:41,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:41,764 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:41,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:41,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370584639] [2021-08-21 12:01:41,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370584639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:41,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153159775] [2021-08-21 12:01:41,764 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:01:41,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:41,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:41,765 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:41,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-08-21 12:01:42,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:01:42,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:42,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:42,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:42,706 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:42,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153159775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:42,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:42,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 12:01:42,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594970991] [2021-08-21 12:01:42,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:01:42,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:42,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:01:42,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:01:42,707 INFO L87 Difference]: Start difference. First operand 1982 states and 5763 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:42,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:42,916 INFO L93 Difference]: Finished difference Result 2266 states and 6436 transitions. [2021-08-21 12:01:42,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:01:42,916 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:42,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:42,919 INFO L225 Difference]: With dead ends: 2266 [2021-08-21 12:01:42,919 INFO L226 Difference]: Without dead ends: 2266 [2021-08-21 12:01:42,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 190.0ms TimeCoverageRelationStatistics Valid=293, Invalid=577, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:01:42,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2266 states. [2021-08-21 12:01:42,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2266 to 2026. [2021-08-21 12:01:42,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2026 states, 2025 states have (on average 2.911604938271605) internal successors, (5896), 2025 states have internal predecessors, (5896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:42,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 5896 transitions. [2021-08-21 12:01:42,944 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 5896 transitions. Word has length 19 [2021-08-21 12:01:42,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:42,944 INFO L470 AbstractCegarLoop]: Abstraction has 2026 states and 5896 transitions. [2021-08-21 12:01:42,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:42,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 5896 transitions. [2021-08-21 12:01:42,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:42,946 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:42,946 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:42,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:43,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-08-21 12:01:43,161 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:43,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:43,161 INFO L82 PathProgramCache]: Analyzing trace with hash 151106073, now seen corresponding path program 144 times [2021-08-21 12:01:43,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:43,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225761193] [2021-08-21 12:01:43,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:43,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:43,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:43,231 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:43,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:43,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225761193] [2021-08-21 12:01:43,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225761193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:43,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818999089] [2021-08-21 12:01:43,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:01:43,232 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:43,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:43,233 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:43,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-08-21 12:01:44,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:01:44,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:44,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 12:01:44,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:44,130 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:44,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818999089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:44,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:44,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:01:44,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729974086] [2021-08-21 12:01:44,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:01:44,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:44,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:01:44,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:01:44,131 INFO L87 Difference]: Start difference. First operand 2026 states and 5896 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:44,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:44,281 INFO L93 Difference]: Finished difference Result 2179 states and 6107 transitions. [2021-08-21 12:01:44,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:01:44,281 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:44,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:44,284 INFO L225 Difference]: With dead ends: 2179 [2021-08-21 12:01:44,284 INFO L226 Difference]: Without dead ends: 2175 [2021-08-21 12:01:44,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:01:44,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2021-08-21 12:01:44,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 2026. [2021-08-21 12:01:44,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2026 states, 2025 states have (on average 2.9071604938271607) internal successors, (5887), 2025 states have internal predecessors, (5887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:44,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 5887 transitions. [2021-08-21 12:01:44,308 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 5887 transitions. Word has length 20 [2021-08-21 12:01:44,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:44,308 INFO L470 AbstractCegarLoop]: Abstraction has 2026 states and 5887 transitions. [2021-08-21 12:01:44,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:44,308 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 5887 transitions. [2021-08-21 12:01:44,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:44,310 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:44,310 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:44,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:44,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:44,529 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:44,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:44,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1762047031, now seen corresponding path program 145 times [2021-08-21 12:01:44,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:44,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202867855] [2021-08-21 12:01:44,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:44,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:44,595 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:44,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:44,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202867855] [2021-08-21 12:01:44,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202867855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:44,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827091029] [2021-08-21 12:01:44,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:01:44,596 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:44,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:44,596 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:44,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-08-21 12:01:45,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:45,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:45,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:45,510 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:45,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827091029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:45,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:45,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-08-21 12:01:45,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274130009] [2021-08-21 12:01:45,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:01:45,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:45,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:01:45,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:01:45,511 INFO L87 Difference]: Start difference. First operand 2026 states and 5887 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:45,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:45,626 INFO L93 Difference]: Finished difference Result 2215 states and 6291 transitions. [2021-08-21 12:01:45,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:01:45,627 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:45,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:45,630 INFO L225 Difference]: With dead ends: 2215 [2021-08-21 12:01:45,630 INFO L226 Difference]: Without dead ends: 2209 [2021-08-21 12:01:45,630 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:01:45,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2021-08-21 12:01:45,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 2029. [2021-08-21 12:01:45,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2029 states, 2028 states have (on average 2.905325443786982) internal successors, (5892), 2028 states have internal predecessors, (5892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:45,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 5892 transitions. [2021-08-21 12:01:45,658 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 5892 transitions. Word has length 20 [2021-08-21 12:01:45,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:45,658 INFO L470 AbstractCegarLoop]: Abstraction has 2029 states and 5892 transitions. [2021-08-21 12:01:45,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:45,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 5892 transitions. [2021-08-21 12:01:45,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:45,661 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:45,661 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:45,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:45,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:45,881 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:45,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:45,881 INFO L82 PathProgramCache]: Analyzing trace with hash -313474941, now seen corresponding path program 146 times [2021-08-21 12:01:45,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:45,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943843467] [2021-08-21 12:01:45,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:45,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:45,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:45,947 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:45,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:45,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943843467] [2021-08-21 12:01:45,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943843467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:45,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631854698] [2021-08-21 12:01:45,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:01:45,947 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:45,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:45,948 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:45,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-08-21 12:01:46,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:01:46,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:46,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:46,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:46,941 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:46,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631854698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:46,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:46,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-08-21 12:01:46,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10537289] [2021-08-21 12:01:46,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:01:46,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:46,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:01:46,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:01:46,941 INFO L87 Difference]: Start difference. First operand 2029 states and 5892 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:47,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:47,065 INFO L93 Difference]: Finished difference Result 2154 states and 6096 transitions. [2021-08-21 12:01:47,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:01:47,066 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:47,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:47,068 INFO L225 Difference]: With dead ends: 2154 [2021-08-21 12:01:47,068 INFO L226 Difference]: Without dead ends: 2145 [2021-08-21 12:01:47,068 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:01:47,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-08-21 12:01:47,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 2017. [2021-08-21 12:01:47,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.9052579365079363) internal successors, (5857), 2016 states have internal predecessors, (5857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:47,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 5857 transitions. [2021-08-21 12:01:47,089 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 5857 transitions. Word has length 20 [2021-08-21 12:01:47,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:47,089 INFO L470 AbstractCegarLoop]: Abstraction has 2017 states and 5857 transitions. [2021-08-21 12:01:47,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:47,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 5857 transitions. [2021-08-21 12:01:47,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:47,091 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:47,091 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:47,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:47,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-08-21 12:01:47,309 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:47,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:47,309 INFO L82 PathProgramCache]: Analyzing trace with hash -586642685, now seen corresponding path program 147 times [2021-08-21 12:01:47,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:47,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92026420] [2021-08-21 12:01:47,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:47,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:47,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:47,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:47,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92026420] [2021-08-21 12:01:47,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92026420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:47,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305024958] [2021-08-21 12:01:47,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:01:47,365 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:47,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:47,383 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:47,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-08-21 12:01:48,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:01:48,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:48,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 12:01:48,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:48,308 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:01:48,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305024958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:48,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:48,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:01:48,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913863315] [2021-08-21 12:01:48,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:48,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:48,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:48,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:48,309 INFO L87 Difference]: Start difference. First operand 2017 states and 5857 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:48,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:48,360 INFO L93 Difference]: Finished difference Result 2186 states and 6119 transitions. [2021-08-21 12:01:48,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:01:48,360 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:48,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:48,363 INFO L225 Difference]: With dead ends: 2186 [2021-08-21 12:01:48,363 INFO L226 Difference]: Without dead ends: 2186 [2021-08-21 12:01:48,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:01:48,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2021-08-21 12:01:48,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 2018. [2021-08-21 12:01:48,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2017 states have (on average 2.903817550818047) internal successors, (5857), 2017 states have internal predecessors, (5857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:48,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 5857 transitions. [2021-08-21 12:01:48,414 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 5857 transitions. Word has length 20 [2021-08-21 12:01:48,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:48,414 INFO L470 AbstractCegarLoop]: Abstraction has 2018 states and 5857 transitions. [2021-08-21 12:01:48,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:48,414 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 5857 transitions. [2021-08-21 12:01:48,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:48,416 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:48,416 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:48,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:48,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:48,630 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:48,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:48,631 INFO L82 PathProgramCache]: Analyzing trace with hash 327643105, now seen corresponding path program 148 times [2021-08-21 12:01:48,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:48,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117305054] [2021-08-21 12:01:48,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:48,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:48,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:48,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117305054] [2021-08-21 12:01:48,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117305054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:48,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82458527] [2021-08-21 12:01:48,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:01:48,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:48,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:48,691 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:48,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-08-21 12:01:49,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:01:49,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:49,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:49,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:49,657 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:01:49,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82458527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:49,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:49,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-08-21 12:01:49,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702622753] [2021-08-21 12:01:49,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:01:49,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:49,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:01:49,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:01:49,658 INFO L87 Difference]: Start difference. First operand 2018 states and 5857 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:49,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:49,734 INFO L93 Difference]: Finished difference Result 2211 states and 6144 transitions. [2021-08-21 12:01:49,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:01:49,735 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:49,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:49,737 INFO L225 Difference]: With dead ends: 2211 [2021-08-21 12:01:49,737 INFO L226 Difference]: Without dead ends: 2210 [2021-08-21 12:01:49,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:01:49,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2021-08-21 12:01:49,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 2022. [2021-08-21 12:01:49,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 2021 states have (on average 2.900544285007422) internal successors, (5862), 2021 states have internal predecessors, (5862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:49,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 5862 transitions. [2021-08-21 12:01:49,761 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 5862 transitions. Word has length 20 [2021-08-21 12:01:49,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:49,761 INFO L470 AbstractCegarLoop]: Abstraction has 2022 states and 5862 transitions. [2021-08-21 12:01:49,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:49,761 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 5862 transitions. [2021-08-21 12:01:49,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:49,763 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:49,763 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:49,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:49,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:49,982 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:49,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:49,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1182949759, now seen corresponding path program 149 times [2021-08-21 12:01:49,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:49,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982781577] [2021-08-21 12:01:49,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:49,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:49,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:50,048 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:50,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:50,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982781577] [2021-08-21 12:01:50,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982781577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:50,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530493643] [2021-08-21 12:01:50,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:01:50,048 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:50,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:50,049 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:50,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-08-21 12:01:51,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:01:51,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:51,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 12:01:51,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:51,049 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:51,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530493643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:51,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:51,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 12:01:51,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097429753] [2021-08-21 12:01:51,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:01:51,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:51,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:01:51,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:01:51,050 INFO L87 Difference]: Start difference. First operand 2022 states and 5862 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:51,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:51,174 INFO L93 Difference]: Finished difference Result 2179 states and 6075 transitions. [2021-08-21 12:01:51,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:01:51,174 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:51,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:51,179 INFO L225 Difference]: With dead ends: 2179 [2021-08-21 12:01:51,179 INFO L226 Difference]: Without dead ends: 2175 [2021-08-21 12:01:51,179 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 85.2ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:01:51,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2021-08-21 12:01:51,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 2007. [2021-08-21 12:01:51,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2007 states, 2006 states have (on average 2.89481555333998) internal successors, (5807), 2006 states have internal predecessors, (5807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:51,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2007 states to 2007 states and 5807 transitions. [2021-08-21 12:01:51,203 INFO L78 Accepts]: Start accepts. Automaton has 2007 states and 5807 transitions. Word has length 20 [2021-08-21 12:01:51,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:51,203 INFO L470 AbstractCegarLoop]: Abstraction has 2007 states and 5807 transitions. [2021-08-21 12:01:51,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:51,203 INFO L276 IsEmpty]: Start isEmpty. Operand 2007 states and 5807 transitions. [2021-08-21 12:01:51,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:51,205 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:51,205 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:51,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:51,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:51,424 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:51,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:51,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1927652257, now seen corresponding path program 150 times [2021-08-21 12:01:51,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:51,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958048040] [2021-08-21 12:01:51,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:51,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:51,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:51,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:51,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958048040] [2021-08-21 12:01:51,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958048040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:51,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575352895] [2021-08-21 12:01:51,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:01:51,490 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:51,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:51,490 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:51,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-08-21 12:01:52,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:01:52,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:52,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 12:01:52,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:52,468 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:52,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575352895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:52,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:52,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 12:01:52,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435298268] [2021-08-21 12:01:52,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:01:52,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:52,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:01:52,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:01:52,469 INFO L87 Difference]: Start difference. First operand 2007 states and 5807 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:52,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:52,615 INFO L93 Difference]: Finished difference Result 2167 states and 6027 transitions. [2021-08-21 12:01:52,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:01:52,616 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:52,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:52,618 INFO L225 Difference]: With dead ends: 2167 [2021-08-21 12:01:52,618 INFO L226 Difference]: Without dead ends: 2161 [2021-08-21 12:01:52,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 99.8ms TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:01:52,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2021-08-21 12:01:52,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 1999. [2021-08-21 12:01:52,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1999 states, 1998 states have (on average 2.8913913913913913) internal successors, (5777), 1998 states have internal predecessors, (5777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:52,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 5777 transitions. [2021-08-21 12:01:52,643 INFO L78 Accepts]: Start accepts. Automaton has 1999 states and 5777 transitions. Word has length 20 [2021-08-21 12:01:52,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:52,643 INFO L470 AbstractCegarLoop]: Abstraction has 1999 states and 5777 transitions. [2021-08-21 12:01:52,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:52,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1999 states and 5777 transitions. [2021-08-21 12:01:52,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:52,645 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:52,645 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:52,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:52,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:52,863 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:52,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:52,864 INFO L82 PathProgramCache]: Analyzing trace with hash -756374081, now seen corresponding path program 151 times [2021-08-21 12:01:52,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:52,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817050215] [2021-08-21 12:01:52,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:52,864 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:52,936 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:52,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:52,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817050215] [2021-08-21 12:01:52,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817050215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:52,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266618912] [2021-08-21 12:01:52,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:01:52,937 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:52,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:52,937 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:52,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-08-21 12:01:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:53,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:53,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:53,939 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:53,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266618912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:53,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:53,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-08-21 12:01:53,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487777658] [2021-08-21 12:01:53,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:01:53,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:53,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:01:53,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:01:53,940 INFO L87 Difference]: Start difference. First operand 1999 states and 5777 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:54,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:54,093 INFO L93 Difference]: Finished difference Result 2163 states and 6003 transitions. [2021-08-21 12:01:54,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:01:54,093 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:54,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:54,096 INFO L225 Difference]: With dead ends: 2163 [2021-08-21 12:01:54,096 INFO L226 Difference]: Without dead ends: 2157 [2021-08-21 12:01:54,096 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 117.9ms TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:01:54,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2021-08-21 12:01:54,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 2000. [2021-08-21 12:01:54,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1999 states have (on average 2.8869434717358677) internal successors, (5771), 1999 states have internal predecessors, (5771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:54,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 5771 transitions. [2021-08-21 12:01:54,120 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 5771 transitions. Word has length 20 [2021-08-21 12:01:54,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:54,120 INFO L470 AbstractCegarLoop]: Abstraction has 2000 states and 5771 transitions. [2021-08-21 12:01:54,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:54,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 5771 transitions. [2021-08-21 12:01:54,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:54,122 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:54,122 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:54,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2021-08-21 12:01:54,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:54,337 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:54,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:54,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1938155361, now seen corresponding path program 152 times [2021-08-21 12:01:54,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:54,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934357371] [2021-08-21 12:01:54,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:54,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:54,406 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:54,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:54,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934357371] [2021-08-21 12:01:54,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934357371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:54,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645910496] [2021-08-21 12:01:54,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:01:54,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:54,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:54,407 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:54,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2021-08-21 12:01:55,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:01:55,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:55,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:01:55,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:55,371 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:55,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645910496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:55,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:55,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-08-21 12:01:55,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798089310] [2021-08-21 12:01:55,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:01:55,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:55,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:01:55,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:01:55,372 INFO L87 Difference]: Start difference. First operand 2000 states and 5771 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:55,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:55,517 INFO L93 Difference]: Finished difference Result 2345 states and 6525 transitions. [2021-08-21 12:01:55,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:01:55,518 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:55,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:55,520 INFO L225 Difference]: With dead ends: 2345 [2021-08-21 12:01:55,520 INFO L226 Difference]: Without dead ends: 2337 [2021-08-21 12:01:55,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 118.6ms TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:01:55,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2021-08-21 12:01:55,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 2013. [2021-08-21 12:01:55,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2013 states, 2012 states have (on average 2.8841948310139167) internal successors, (5803), 2012 states have internal predecessors, (5803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:55,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 5803 transitions. [2021-08-21 12:01:55,542 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 5803 transitions. Word has length 20 [2021-08-21 12:01:55,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:55,543 INFO L470 AbstractCegarLoop]: Abstraction has 2013 states and 5803 transitions. [2021-08-21 12:01:55,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:55,543 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 5803 transitions. [2021-08-21 12:01:55,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:55,545 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:55,545 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:55,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:55,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-08-21 12:01:55,763 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:55,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:55,763 INFO L82 PathProgramCache]: Analyzing trace with hash 2021483669, now seen corresponding path program 153 times [2021-08-21 12:01:55,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:55,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096901020] [2021-08-21 12:01:55,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:55,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:55,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:55,845 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:55,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:55,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096901020] [2021-08-21 12:01:55,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096901020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:55,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364157981] [2021-08-21 12:01:55,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:01:55,846 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:55,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:55,846 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:55,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-08-21 12:01:56,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:01:56,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:56,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 12:01:56,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:56,842 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:56,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364157981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:56,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:56,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 12:01:56,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352616192] [2021-08-21 12:01:56,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:01:56,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:56,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:01:56,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:01:56,843 INFO L87 Difference]: Start difference. First operand 2013 states and 5803 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:56,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:56,980 INFO L93 Difference]: Finished difference Result 2169 states and 6079 transitions. [2021-08-21 12:01:56,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:01:56,980 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:56,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:56,982 INFO L225 Difference]: With dead ends: 2169 [2021-08-21 12:01:56,982 INFO L226 Difference]: Without dead ends: 2161 [2021-08-21 12:01:56,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 115.6ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:01:56,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2021-08-21 12:01:56,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 2008. [2021-08-21 12:01:57,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 2.88141504733433) internal successors, (5783), 2007 states have internal predecessors, (5783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:57,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 5783 transitions. [2021-08-21 12:01:57,003 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 5783 transitions. Word has length 20 [2021-08-21 12:01:57,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:57,004 INFO L470 AbstractCegarLoop]: Abstraction has 2008 states and 5783 transitions. [2021-08-21 12:01:57,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:57,004 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 5783 transitions. [2021-08-21 12:01:57,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:57,006 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:57,006 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:57,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:57,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:57,221 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:57,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:57,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1348285829, now seen corresponding path program 154 times [2021-08-21 12:01:57,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:57,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973876789] [2021-08-21 12:01:57,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:57,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:57,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:57,280 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:57,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:57,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973876789] [2021-08-21 12:01:57,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973876789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:57,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543489590] [2021-08-21 12:01:57,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:01:57,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:57,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:57,281 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:57,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2021-08-21 12:01:58,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:01:58,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:58,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 12:01:58,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:58,288 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:01:58,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543489590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:58,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:58,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:01:58,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145759906] [2021-08-21 12:01:58,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:58,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:58,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:58,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:58,289 INFO L87 Difference]: Start difference. First operand 2008 states and 5783 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:58,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:58,350 INFO L93 Difference]: Finished difference Result 2187 states and 6051 transitions. [2021-08-21 12:01:58,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:01:58,351 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:58,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:58,353 INFO L225 Difference]: With dead ends: 2187 [2021-08-21 12:01:58,353 INFO L226 Difference]: Without dead ends: 2185 [2021-08-21 12:01:58,353 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:01:58,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2185 states. [2021-08-21 12:01:58,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2185 to 2004. [2021-08-21 12:01:58,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 2003 states have (on average 2.8801797304043935) internal successors, (5769), 2003 states have internal predecessors, (5769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:58,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 5769 transitions. [2021-08-21 12:01:58,381 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 5769 transitions. Word has length 20 [2021-08-21 12:01:58,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:58,381 INFO L470 AbstractCegarLoop]: Abstraction has 2004 states and 5769 transitions. [2021-08-21 12:01:58,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:58,381 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 5769 transitions. [2021-08-21 12:01:58,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:58,383 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:58,383 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:58,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:58,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-08-21 12:01:58,597 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:58,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:58,597 INFO L82 PathProgramCache]: Analyzing trace with hash -434000039, now seen corresponding path program 155 times [2021-08-21 12:01:58,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:58,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182479879] [2021-08-21 12:01:58,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:58,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:58,650 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:58,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:58,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182479879] [2021-08-21 12:01:58,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182479879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:58,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657949207] [2021-08-21 12:01:58,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:01:58,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:58,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:58,651 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:58,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2021-08-21 12:01:59,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:01:59,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:59,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 12:01:59,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:59,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657949207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:59,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:59,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:01:59,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651693637] [2021-08-21 12:01:59,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:59,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:59,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:59,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:59,683 INFO L87 Difference]: Start difference. First operand 2004 states and 5769 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:59,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:59,745 INFO L93 Difference]: Finished difference Result 2177 states and 6006 transitions. [2021-08-21 12:01:59,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:01:59,745 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:59,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:59,747 INFO L225 Difference]: With dead ends: 2177 [2021-08-21 12:01:59,747 INFO L226 Difference]: Without dead ends: 2175 [2021-08-21 12:01:59,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:01:59,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2021-08-21 12:01:59,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 1994. [2021-08-21 12:01:59,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 2.8760662318113397) internal successors, (5732), 1993 states have internal predecessors, (5732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:59,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 5732 transitions. [2021-08-21 12:01:59,770 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 5732 transitions. Word has length 20 [2021-08-21 12:01:59,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:59,770 INFO L470 AbstractCegarLoop]: Abstraction has 1994 states and 5732 transitions. [2021-08-21 12:01:59,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:59,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 5732 transitions. [2021-08-21 12:01:59,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:59,772 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:59,772 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:59,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:59,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-08-21 12:01:59,990 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:59,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:59,990 INFO L82 PathProgramCache]: Analyzing trace with hash 421306615, now seen corresponding path program 156 times [2021-08-21 12:01:59,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:59,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916335205] [2021-08-21 12:01:59,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:59,991 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:00,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:00,111 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:00,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:00,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916335205] [2021-08-21 12:02:00,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916335205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:00,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313836040] [2021-08-21 12:02:00,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:02:00,112 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:00,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:00,113 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:00,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2021-08-21 12:02:01,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:02:01,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:01,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 12:02:01,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:01,166 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:01,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313836040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:01,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:01,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 12:02:01,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246896104] [2021-08-21 12:02:01,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:02:01,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:01,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:02:01,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:02:01,167 INFO L87 Difference]: Start difference. First operand 1994 states and 5732 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:01,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:01,317 INFO L93 Difference]: Finished difference Result 2170 states and 5974 transitions. [2021-08-21 12:02:01,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:02:01,317 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:02:01,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:01,320 INFO L225 Difference]: With dead ends: 2170 [2021-08-21 12:02:01,320 INFO L226 Difference]: Without dead ends: 2167 [2021-08-21 12:02:01,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 117.0ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:02:01,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2167 states. [2021-08-21 12:02:01,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2167 to 1984. [2021-08-21 12:02:01,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1984 states, 1983 states have (on average 2.870398386283409) internal successors, (5692), 1983 states have internal predecessors, (5692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:01,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 5692 transitions. [2021-08-21 12:02:01,357 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 5692 transitions. Word has length 20 [2021-08-21 12:02:01,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:01,357 INFO L470 AbstractCegarLoop]: Abstraction has 1984 states and 5692 transitions. [2021-08-21 12:02:01,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:01,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 5692 transitions. [2021-08-21 12:02:01,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:02:01,360 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:01,360 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:01,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:01,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-08-21 12:02:01,561 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:01,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:01,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1166009113, now seen corresponding path program 157 times [2021-08-21 12:02:01,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:01,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469621841] [2021-08-21 12:02:01,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:01,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:01,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:01,628 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:01,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:01,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469621841] [2021-08-21 12:02:01,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469621841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:01,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161012970] [2021-08-21 12:02:01,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:02:01,628 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:01,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:01,629 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:01,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2021-08-21 12:02:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:02,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:02:02,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:02,697 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:02,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161012970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:02,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:02,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-08-21 12:02:02,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895609583] [2021-08-21 12:02:02,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:02:02,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:02,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:02:02,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:02:02,698 INFO L87 Difference]: Start difference. First operand 1984 states and 5692 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:02,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:02,852 INFO L93 Difference]: Finished difference Result 2164 states and 5941 transitions. [2021-08-21 12:02:02,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:02:02,852 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:02:02,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:02,855 INFO L225 Difference]: With dead ends: 2164 [2021-08-21 12:02:02,855 INFO L226 Difference]: Without dead ends: 2160 [2021-08-21 12:02:02,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:02:02,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2160 states. [2021-08-21 12:02:02,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2160 to 1984. [2021-08-21 12:02:02,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1984 states, 1983 states have (on average 2.863842662632375) internal successors, (5679), 1983 states have internal predecessors, (5679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:02,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 5679 transitions. [2021-08-21 12:02:02,881 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 5679 transitions. Word has length 20 [2021-08-21 12:02:02,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:02,881 INFO L470 AbstractCegarLoop]: Abstraction has 1984 states and 5679 transitions. [2021-08-21 12:02:02,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:02,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 5679 transitions. [2021-08-21 12:02:02,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:02:02,884 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:02,884 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:02,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:03,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:03,103 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:03,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:03,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1518017225, now seen corresponding path program 158 times [2021-08-21 12:02:03,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:03,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100863305] [2021-08-21 12:02:03,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:03,103 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:03,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:03,182 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:03,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:03,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100863305] [2021-08-21 12:02:03,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100863305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:03,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822208313] [2021-08-21 12:02:03,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:02:03,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:03,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:03,183 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:03,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2021-08-21 12:02:04,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:02:04,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:04,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:02:04,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:04,211 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:02:04,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822208313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:04,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:04,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-08-21 12:02:04,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720859734] [2021-08-21 12:02:04,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:02:04,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:04,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:02:04,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:02:04,212 INFO L87 Difference]: Start difference. First operand 1984 states and 5679 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:04,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:04,332 INFO L93 Difference]: Finished difference Result 2560 states and 7009 transitions. [2021-08-21 12:02:04,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:02:04,333 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:02:04,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:04,336 INFO L225 Difference]: With dead ends: 2560 [2021-08-21 12:02:04,336 INFO L226 Difference]: Without dead ends: 2554 [2021-08-21 12:02:04,337 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:02:04,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2021-08-21 12:02:04,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 1984. [2021-08-21 12:02:04,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1984 states, 1983 states have (on average 2.8623298033282905) internal successors, (5676), 1983 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:04,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 5676 transitions. [2021-08-21 12:02:04,365 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 5676 transitions. Word has length 20 [2021-08-21 12:02:04,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:04,365 INFO L470 AbstractCegarLoop]: Abstraction has 1984 states and 5676 transitions. [2021-08-21 12:02:04,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:04,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 5676 transitions. [2021-08-21 12:02:04,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:02:04,367 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:04,367 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:04,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:04,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:04,586 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:04,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:04,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1176512217, now seen corresponding path program 159 times [2021-08-21 12:02:04,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:04,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054406302] [2021-08-21 12:02:04,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:04,587 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:04,670 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:04,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:04,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054406302] [2021-08-21 12:02:04,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054406302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:04,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564035110] [2021-08-21 12:02:04,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:02:04,670 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:04,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:04,671 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:04,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2021-08-21 12:02:05,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:02:05,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:05,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 12:02:05,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:05,703 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:05,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564035110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:05,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:05,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 12:02:05,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880068658] [2021-08-21 12:02:05,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:02:05,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:05,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:02:05,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:02:05,704 INFO L87 Difference]: Start difference. First operand 1984 states and 5676 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:05,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:05,841 INFO L93 Difference]: Finished difference Result 2572 states and 7019 transitions. [2021-08-21 12:02:05,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:02:05,841 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:02:05,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:05,845 INFO L225 Difference]: With dead ends: 2572 [2021-08-21 12:02:05,845 INFO L226 Difference]: Without dead ends: 2564 [2021-08-21 12:02:05,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 116.2ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:02:05,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2564 states. [2021-08-21 12:02:05,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2564 to 1994. [2021-08-21 12:02:05,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 2.86352232814852) internal successors, (5707), 1993 states have internal predecessors, (5707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:05,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 5707 transitions. [2021-08-21 12:02:05,874 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 5707 transitions. Word has length 20 [2021-08-21 12:02:05,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:05,874 INFO L470 AbstractCegarLoop]: Abstraction has 1994 states and 5707 transitions. [2021-08-21 12:02:05,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:05,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 5707 transitions. [2021-08-21 12:02:05,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:02:05,877 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:05,877 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:05,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2021-08-21 12:02:06,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:06,089 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:06,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:06,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1192421001, now seen corresponding path program 160 times [2021-08-21 12:02:06,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:06,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126746415] [2021-08-21 12:02:06,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:06,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:06,179 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:06,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:06,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126746415] [2021-08-21 12:02:06,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126746415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:06,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765126779] [2021-08-21 12:02:06,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:02:06,180 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:06,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:06,180 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:06,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2021-08-21 12:02:07,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:02:07,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:07,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:02:07,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:07,239 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:07,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765126779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:07,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:07,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-08-21 12:02:07,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866737613] [2021-08-21 12:02:07,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:02:07,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:07,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:02:07,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:02:07,240 INFO L87 Difference]: Start difference. First operand 1994 states and 5707 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:07,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:07,399 INFO L93 Difference]: Finished difference Result 2339 states and 6462 transitions. [2021-08-21 12:02:07,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:02:07,400 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:02:07,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:07,403 INFO L225 Difference]: With dead ends: 2339 [2021-08-21 12:02:07,403 INFO L226 Difference]: Without dead ends: 2329 [2021-08-21 12:02:07,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 144.9ms TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:02:07,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2329 states. [2021-08-21 12:02:07,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2329 to 1994. [2021-08-21 12:02:07,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 2.8625188158554944) internal successors, (5705), 1993 states have internal predecessors, (5705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:07,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 5705 transitions. [2021-08-21 12:02:07,430 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 5705 transitions. Word has length 20 [2021-08-21 12:02:07,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:07,430 INFO L470 AbstractCegarLoop]: Abstraction has 1994 states and 5705 transitions. [2021-08-21 12:02:07,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:07,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 5705 transitions. [2021-08-21 12:02:07,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:02:07,433 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:07,433 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:07,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:07,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:07,652 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:07,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:07,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1075321405, now seen corresponding path program 161 times [2021-08-21 12:02:07,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:07,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634575308] [2021-08-21 12:02:07,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:07,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:07,732 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:07,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:07,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634575308] [2021-08-21 12:02:07,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634575308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:07,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720729825] [2021-08-21 12:02:07,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:02:07,732 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:07,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:07,733 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:07,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2021-08-21 12:02:08,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:02:08,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:08,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:02:08,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:08,866 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:02:08,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720729825] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:08,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:08,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-08-21 12:02:08,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208054461] [2021-08-21 12:02:08,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:02:08,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:08,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:02:08,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:02:08,867 INFO L87 Difference]: Start difference. First operand 1994 states and 5705 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:08,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:08,991 INFO L93 Difference]: Finished difference Result 2082 states and 5829 transitions. [2021-08-21 12:02:08,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:02:08,991 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:02:08,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:08,994 INFO L225 Difference]: With dead ends: 2082 [2021-08-21 12:02:08,994 INFO L226 Difference]: Without dead ends: 2082 [2021-08-21 12:02:08,994 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 118.1ms TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:02:08,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2021-08-21 12:02:09,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 1960. [2021-08-21 12:02:09,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1960 states, 1959 states have (on average 2.859111791730475) internal successors, (5601), 1959 states have internal predecessors, (5601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:09,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1960 states to 1960 states and 5601 transitions. [2021-08-21 12:02:09,019 INFO L78 Accepts]: Start accepts. Automaton has 1960 states and 5601 transitions. Word has length 20 [2021-08-21 12:02:09,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:09,019 INFO L470 AbstractCegarLoop]: Abstraction has 1960 states and 5601 transitions. [2021-08-21 12:02:09,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:09,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1960 states and 5601 transitions. [2021-08-21 12:02:09,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:02:09,022 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:09,022 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:09,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:09,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:09,237 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:09,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:09,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1333906751, now seen corresponding path program 162 times [2021-08-21 12:02:09,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:09,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608840560] [2021-08-21 12:02:09,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:09,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:09,311 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:09,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:09,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608840560] [2021-08-21 12:02:09,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608840560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:09,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320184935] [2021-08-21 12:02:09,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:02:09,311 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:09,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:09,312 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:09,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2021-08-21 12:02:10,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:02:10,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:10,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 12:02:10,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:10,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320184935] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:10,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:10,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:02:10,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567062446] [2021-08-21 12:02:10,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:02:10,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:10,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:02:10,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:02:10,482 INFO L87 Difference]: Start difference. First operand 1960 states and 5601 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:10,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:10,621 INFO L93 Difference]: Finished difference Result 2188 states and 6010 transitions. [2021-08-21 12:02:10,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:02:10,621 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:02:10,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:10,624 INFO L225 Difference]: With dead ends: 2188 [2021-08-21 12:02:10,624 INFO L226 Difference]: Without dead ends: 2179 [2021-08-21 12:02:10,624 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 98.0ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:02:10,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2179 states. [2021-08-21 12:02:10,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2179 to 1953. [2021-08-21 12:02:10,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 2.8545081967213113) internal successors, (5572), 1952 states have internal predecessors, (5572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:10,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 5572 transitions. [2021-08-21 12:02:10,649 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 5572 transitions. Word has length 20 [2021-08-21 12:02:10,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:10,650 INFO L470 AbstractCegarLoop]: Abstraction has 1953 states and 5572 transitions. [2021-08-21 12:02:10,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:10,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 5572 transitions. [2021-08-21 12:02:10,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:02:10,652 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:10,652 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:10,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:10,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:10,871 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:10,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:10,871 INFO L82 PathProgramCache]: Analyzing trace with hash -266531103, now seen corresponding path program 163 times [2021-08-21 12:02:10,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:10,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26976288] [2021-08-21 12:02:10,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:10,871 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:10,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:10,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:10,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26976288] [2021-08-21 12:02:10,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26976288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:10,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001746611] [2021-08-21 12:02:10,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:02:10,952 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:10,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:10,953 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:10,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2021-08-21 12:02:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:12,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:02:12,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:12,119 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:12,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001746611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:12,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:12,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-08-21 12:02:12,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743676911] [2021-08-21 12:02:12,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:02:12,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:12,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:02:12,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:02:12,120 INFO L87 Difference]: Start difference. First operand 1953 states and 5572 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:12,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:12,248 INFO L93 Difference]: Finished difference Result 2187 states and 5992 transitions. [2021-08-21 12:02:12,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:02:12,249 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:02:12,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:12,252 INFO L225 Difference]: With dead ends: 2187 [2021-08-21 12:02:12,252 INFO L226 Difference]: Without dead ends: 2179 [2021-08-21 12:02:12,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:02:12,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2179 states. [2021-08-21 12:02:12,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2179 to 1967. [2021-08-21 12:02:12,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1966 states have (on average 2.850966429298067) internal successors, (5605), 1966 states have internal predecessors, (5605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:12,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 5605 transitions. [2021-08-21 12:02:12,278 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 5605 transitions. Word has length 20 [2021-08-21 12:02:12,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:12,278 INFO L470 AbstractCegarLoop]: Abstraction has 1967 states and 5605 transitions. [2021-08-21 12:02:12,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:12,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 5605 transitions. [2021-08-21 12:02:12,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:02:12,280 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:12,280 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:12,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:12,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-08-21 12:02:12,489 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:12,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:12,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1659502975, now seen corresponding path program 164 times [2021-08-21 12:02:12,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:12,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820897789] [2021-08-21 12:02:12,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:12,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:12,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:12,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820897789] [2021-08-21 12:02:12,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820897789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:12,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634575725] [2021-08-21 12:02:12,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:02:12,578 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:12,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:12,579 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:12,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2021-08-21 12:02:13,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:02:13,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:13,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:02:13,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:13,652 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:13,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634575725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:13,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:13,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-08-21 12:02:13,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804719969] [2021-08-21 12:02:13,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:02:13,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:13,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:02:13,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:02:13,653 INFO L87 Difference]: Start difference. First operand 1967 states and 5605 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:13,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:13,812 INFO L93 Difference]: Finished difference Result 2386 states and 6532 transitions. [2021-08-21 12:02:13,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:02:13,813 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:02:13,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:13,816 INFO L225 Difference]: With dead ends: 2386 [2021-08-21 12:02:13,817 INFO L226 Difference]: Without dead ends: 2376 [2021-08-21 12:02:13,817 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 135.3ms TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:02:13,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2021-08-21 12:02:13,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 1974. [2021-08-21 12:02:13,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 2.848960973137354) internal successors, (5621), 1973 states have internal predecessors, (5621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:13,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 5621 transitions. [2021-08-21 12:02:13,843 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 5621 transitions. Word has length 20 [2021-08-21 12:02:13,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:13,844 INFO L470 AbstractCegarLoop]: Abstraction has 1974 states and 5621 transitions. [2021-08-21 12:02:13,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:13,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 5621 transitions. [2021-08-21 12:02:13,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:02:13,846 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:13,846 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:13,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:14,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-08-21 12:02:14,065 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:14,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:14,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1020081505, now seen corresponding path program 165 times [2021-08-21 12:02:14,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:14,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480416343] [2021-08-21 12:02:14,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:14,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:14,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:14,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:14,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480416343] [2021-08-21 12:02:14,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480416343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:14,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826877314] [2021-08-21 12:02:14,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:02:14,141 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:14,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:14,141 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:14,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2021-08-21 12:02:15,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:02:15,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:15,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 12:02:15,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:15,310 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:15,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826877314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:15,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:15,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 12:02:15,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478786389] [2021-08-21 12:02:15,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:02:15,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:15,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:02:15,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:02:15,311 INFO L87 Difference]: Start difference. First operand 1974 states and 5621 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:15,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:15,385 INFO L93 Difference]: Finished difference Result 2162 states and 5909 transitions. [2021-08-21 12:02:15,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:02:15,386 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:02:15,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:15,399 INFO L225 Difference]: With dead ends: 2162 [2021-08-21 12:02:15,405 INFO L226 Difference]: Without dead ends: 2162 [2021-08-21 12:02:15,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:02:15,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2021-08-21 12:02:15,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 1976. [2021-08-21 12:02:15,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1976 states, 1975 states have (on average 2.849113924050633) internal successors, (5627), 1975 states have internal predecessors, (5627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:15,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1976 states to 1976 states and 5627 transitions. [2021-08-21 12:02:15,430 INFO L78 Accepts]: Start accepts. Automaton has 1976 states and 5627 transitions. Word has length 20 [2021-08-21 12:02:15,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:15,430 INFO L470 AbstractCegarLoop]: Abstraction has 1976 states and 5627 transitions. [2021-08-21 12:02:15,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:15,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1976 states and 5627 transitions. [2021-08-21 12:02:15,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:02:15,432 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:15,432 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:15,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:15,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-08-21 12:02:15,649 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:15,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:15,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1390756547, now seen corresponding path program 166 times [2021-08-21 12:02:15,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:15,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202967759] [2021-08-21 12:02:15,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:15,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:15,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:15,730 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:15,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:15,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202967759] [2021-08-21 12:02:15,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202967759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:15,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078381150] [2021-08-21 12:02:15,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:02:15,730 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:15,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:15,731 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:15,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2021-08-21 12:02:16,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:02:16,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:16,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:02:16,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:16,831 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:16,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078381150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:16,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:16,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-08-21 12:02:16,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778546877] [2021-08-21 12:02:16,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:02:16,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:16,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:02:16,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:02:16,832 INFO L87 Difference]: Start difference. First operand 1976 states and 5627 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:17,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:17,026 INFO L93 Difference]: Finished difference Result 2175 states and 5981 transitions. [2021-08-21 12:02:17,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:02:17,026 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:02:17,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:17,030 INFO L225 Difference]: With dead ends: 2175 [2021-08-21 12:02:17,030 INFO L226 Difference]: Without dead ends: 2165 [2021-08-21 12:02:17,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 140.8ms TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:02:17,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2165 states. [2021-08-21 12:02:17,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2165 to 1971. [2021-08-21 12:02:17,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1971 states, 1970 states have (on average 2.844162436548223) internal successors, (5603), 1970 states have internal predecessors, (5603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:17,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1971 states to 1971 states and 5603 transitions. [2021-08-21 12:02:17,066 INFO L78 Accepts]: Start accepts. Automaton has 1971 states and 5603 transitions. Word has length 20 [2021-08-21 12:02:17,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:17,067 INFO L470 AbstractCegarLoop]: Abstraction has 1971 states and 5603 transitions. [2021-08-21 12:02:17,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:17,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1971 states and 5603 transitions. [2021-08-21 12:02:17,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:02:17,069 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:17,070 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:17,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:17,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-08-21 12:02:17,274 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:17,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:17,274 INFO L82 PathProgramCache]: Analyzing trace with hash 810580483, now seen corresponding path program 167 times [2021-08-21 12:02:17,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:17,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31192445] [2021-08-21 12:02:17,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:17,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:17,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:17,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:17,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31192445] [2021-08-21 12:02:17,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31192445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:17,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775800504] [2021-08-21 12:02:17,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:02:17,331 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:17,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:17,332 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:17,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2021-08-21 12:02:18,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:02:18,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:18,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:02:18,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:18,456 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:02:18,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775800504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:18,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:18,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-08-21 12:02:18,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945013128] [2021-08-21 12:02:18,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:02:18,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:18,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:02:18,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:02:18,463 INFO L87 Difference]: Start difference. First operand 1971 states and 5603 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:18,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:18,524 INFO L93 Difference]: Finished difference Result 2211 states and 5974 transitions. [2021-08-21 12:02:18,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:02:18,525 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 20 [2021-08-21 12:02:18,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:18,527 INFO L225 Difference]: With dead ends: 2211 [2021-08-21 12:02:18,527 INFO L226 Difference]: Without dead ends: 2211 [2021-08-21 12:02:18,527 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:02:18,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-08-21 12:02:18,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 1978. [2021-08-21 12:02:18,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 2.8467374810318664) internal successors, (5628), 1977 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:18,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 5628 transitions. [2021-08-21 12:02:18,555 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 5628 transitions. Word has length 20 [2021-08-21 12:02:18,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:18,555 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 5628 transitions. [2021-08-21 12:02:18,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:18,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 5628 transitions. [2021-08-21 12:02:18,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:02:18,557 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:18,557 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:18,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:18,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:18,773 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:18,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:18,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1714794369, now seen corresponding path program 168 times [2021-08-21 12:02:18,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:18,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732141722] [2021-08-21 12:02:18,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:18,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:18,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:18,855 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:18,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:18,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732141722] [2021-08-21 12:02:18,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732141722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:18,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310134715] [2021-08-21 12:02:18,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:02:18,855 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:18,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:18,856 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:18,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2021-08-21 12:02:19,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:02:19,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:19,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 12:02:19,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:19,918 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:19,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310134715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:19,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:19,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 12:02:19,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571768215] [2021-08-21 12:02:19,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:02:19,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:19,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:02:19,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:02:19,919 INFO L87 Difference]: Start difference. First operand 1978 states and 5628 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:20,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:20,032 INFO L93 Difference]: Finished difference Result 2166 states and 5883 transitions. [2021-08-21 12:02:20,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:02:20,033 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:02:20,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:20,036 INFO L225 Difference]: With dead ends: 2166 [2021-08-21 12:02:20,036 INFO L226 Difference]: Without dead ends: 2164 [2021-08-21 12:02:20,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:02:20,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2164 states. [2021-08-21 12:02:20,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2164 to 1978. [2021-08-21 12:02:20,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 2.843702579666161) internal successors, (5622), 1977 states have internal predecessors, (5622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:20,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 5622 transitions. [2021-08-21 12:02:20,061 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 5622 transitions. Word has length 20 [2021-08-21 12:02:20,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:20,061 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 5622 transitions. [2021-08-21 12:02:20,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:20,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 5622 transitions. [2021-08-21 12:02:20,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:02:20,063 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:20,063 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:20,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:20,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:20,272 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:20,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:20,272 INFO L82 PathProgramCache]: Analyzing trace with hash -970091871, now seen corresponding path program 169 times [2021-08-21 12:02:20,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:20,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716282106] [2021-08-21 12:02:20,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:20,272 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:20,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:20,369 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:20,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:20,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716282106] [2021-08-21 12:02:20,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716282106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:20,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560073462] [2021-08-21 12:02:20,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:02:20,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:20,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:20,371 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:20,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2021-08-21 12:02:21,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:21,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:02:21,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:02:21,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560073462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:21,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:21,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-08-21 12:02:21,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386001379] [2021-08-21 12:02:21,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:02:21,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:21,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:02:21,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:02:21,443 INFO L87 Difference]: Start difference. First operand 1978 states and 5622 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:21,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:21,560 INFO L93 Difference]: Finished difference Result 2171 states and 5884 transitions. [2021-08-21 12:02:21,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:02:21,560 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:02:21,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:21,563 INFO L225 Difference]: With dead ends: 2171 [2021-08-21 12:02:21,563 INFO L226 Difference]: Without dead ends: 2167 [2021-08-21 12:02:21,563 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:02:21,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2167 states. [2021-08-21 12:02:21,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2167 to 1978. [2021-08-21 12:02:21,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 2.8376327769347496) internal successors, (5610), 1977 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:21,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 5610 transitions. [2021-08-21 12:02:21,586 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 5610 transitions. Word has length 20 [2021-08-21 12:02:21,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:21,587 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 5610 transitions. [2021-08-21 12:02:21,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:21,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 5610 transitions. [2021-08-21 12:02:21,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:02:21,589 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:21,589 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:21,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:21,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:21,799 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:21,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:21,799 INFO L82 PathProgramCache]: Analyzing trace with hash 640849087, now seen corresponding path program 170 times [2021-08-21 12:02:21,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:21,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760221069] [2021-08-21 12:02:21,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:21,799 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:21,873 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:21,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:21,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760221069] [2021-08-21 12:02:21,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760221069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:21,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34624690] [2021-08-21 12:02:21,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:02:21,873 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:21,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:21,874 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:21,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2021-08-21 12:02:22,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:02:22,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:22,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:02:22,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:22,948 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:22,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34624690] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:22,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:22,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-08-21 12:02:22,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973421923] [2021-08-21 12:02:22,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:02:22,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:22,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:02:22,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:02:22,949 INFO L87 Difference]: Start difference. First operand 1978 states and 5610 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:23,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:23,095 INFO L93 Difference]: Finished difference Result 2179 states and 5883 transitions. [2021-08-21 12:02:23,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:02:23,095 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:02:23,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:23,098 INFO L225 Difference]: With dead ends: 2179 [2021-08-21 12:02:23,098 INFO L226 Difference]: Without dead ends: 2173 [2021-08-21 12:02:23,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:02:23,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2173 states. [2021-08-21 12:02:23,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2173 to 1978. [2021-08-21 12:02:23,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 2.829539706626201) internal successors, (5594), 1977 states have internal predecessors, (5594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:23,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 5594 transitions. [2021-08-21 12:02:23,125 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 5594 transitions. Word has length 20 [2021-08-21 12:02:23,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:23,125 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 5594 transitions. [2021-08-21 12:02:23,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:23,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 5594 transitions. [2021-08-21 12:02:23,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:02:23,127 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:23,127 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:23,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:23,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:23,340 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:23,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:23,340 INFO L82 PathProgramCache]: Analyzing trace with hash -959588767, now seen corresponding path program 171 times [2021-08-21 12:02:23,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:23,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503291424] [2021-08-21 12:02:23,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:23,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:23,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:23,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503291424] [2021-08-21 12:02:23,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503291424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:23,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204643269] [2021-08-21 12:02:23,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:02:23,424 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:23,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:23,424 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:23,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2021-08-21 12:02:24,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:02:24,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:24,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 12:02:24,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:24,545 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:24,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204643269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:24,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:24,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 12:02:24,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094940004] [2021-08-21 12:02:24,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:02:24,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:24,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:02:24,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:02:24,546 INFO L87 Difference]: Start difference. First operand 1978 states and 5594 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:24,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:24,681 INFO L93 Difference]: Finished difference Result 2725 states and 7346 transitions. [2021-08-21 12:02:24,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:02:24,681 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:02:24,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:24,685 INFO L225 Difference]: With dead ends: 2725 [2021-08-21 12:02:24,685 INFO L226 Difference]: Without dead ends: 2717 [2021-08-21 12:02:24,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:02:24,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2717 states. [2021-08-21 12:02:24,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2717 to 1997. [2021-08-21 12:02:24,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1997 states, 1996 states have (on average 2.8261523046092183) internal successors, (5641), 1996 states have internal predecessors, (5641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:24,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1997 states to 1997 states and 5641 transitions. [2021-08-21 12:02:24,714 INFO L78 Accepts]: Start accepts. Automaton has 1997 states and 5641 transitions. Word has length 20 [2021-08-21 12:02:24,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:24,715 INFO L470 AbstractCegarLoop]: Abstraction has 1997 states and 5641 transitions. [2021-08-21 12:02:24,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:24,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1997 states and 5641 transitions. [2021-08-21 12:02:24,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:02:24,717 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:24,717 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:24,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:24,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:24,924 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:24,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:24,924 INFO L82 PathProgramCache]: Analyzing trace with hash 966445311, now seen corresponding path program 172 times [2021-08-21 12:02:24,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:24,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961070969] [2021-08-21 12:02:24,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:24,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:24,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:25,015 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:25,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:25,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961070969] [2021-08-21 12:02:25,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961070969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:25,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781501632] [2021-08-21 12:02:25,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:02:25,015 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:25,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:25,016 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:25,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2021-08-21 12:02:26,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:02:26,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:26,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:02:26,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:26,167 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:26,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781501632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:26,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:26,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-08-21 12:02:26,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213001021] [2021-08-21 12:02:26,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:02:26,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:26,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:02:26,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:02:26,167 INFO L87 Difference]: Start difference. First operand 1997 states and 5641 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:26,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:26,327 INFO L93 Difference]: Finished difference Result 2744 states and 7366 transitions. [2021-08-21 12:02:26,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:02:26,327 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:02:26,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:26,331 INFO L225 Difference]: With dead ends: 2744 [2021-08-21 12:02:26,331 INFO L226 Difference]: Without dead ends: 2734 [2021-08-21 12:02:26,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 138.3ms TimeCoverageRelationStatistics Valid=209, Invalid=441, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:02:26,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-08-21 12:02:26,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 2016. [2021-08-21 12:02:26,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2016 states, 2015 states have (on average 2.8218362282878413) internal successors, (5686), 2015 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:26,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 5686 transitions. [2021-08-21 12:02:26,362 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 5686 transitions. Word has length 20 [2021-08-21 12:02:26,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:26,362 INFO L470 AbstractCegarLoop]: Abstraction has 2016 states and 5686 transitions. [2021-08-21 12:02:26,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:26,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 5686 transitions. [2021-08-21 12:02:26,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:02:26,365 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:26,365 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:26,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:26,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:26,584 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:26,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:26,584 INFO L82 PathProgramCache]: Analyzing trace with hash 543959585, now seen corresponding path program 173 times [2021-08-21 12:02:26,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:26,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645886342] [2021-08-21 12:02:26,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:26,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:26,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:26,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645886342] [2021-08-21 12:02:26,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645886342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:26,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132479020] [2021-08-21 12:02:26,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:02:26,668 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:26,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:26,669 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:26,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2021-08-21 12:02:27,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:02:27,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:27,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:02:27,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:27,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132479020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:27,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:27,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-08-21 12:02:27,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357211435] [2021-08-21 12:02:27,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:02:27,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:27,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:02:27,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:02:27,710 INFO L87 Difference]: Start difference. First operand 2016 states and 5686 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:27,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:27,946 INFO L93 Difference]: Finished difference Result 2541 states and 6857 transitions. [2021-08-21 12:02:27,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:02:27,947 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:02:27,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:27,950 INFO L225 Difference]: With dead ends: 2541 [2021-08-21 12:02:27,950 INFO L226 Difference]: Without dead ends: 2529 [2021-08-21 12:02:27,951 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 180.6ms TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:02:27,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2529 states. [2021-08-21 12:02:27,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2529 to 2018. [2021-08-21 12:02:27,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2017 states have (on average 2.8190381755081804) internal successors, (5686), 2017 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:27,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 5686 transitions. [2021-08-21 12:02:27,977 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 5686 transitions. Word has length 20 [2021-08-21 12:02:27,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:27,977 INFO L470 AbstractCegarLoop]: Abstraction has 2018 states and 5686 transitions. [2021-08-21 12:02:27,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:27,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 5686 transitions. [2021-08-21 12:02:27,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:02:27,980 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:27,980 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:27,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:28,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-08-21 12:02:28,182 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:28,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:28,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1434975931, now seen corresponding path program 174 times [2021-08-21 12:02:28,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:28,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113580910] [2021-08-21 12:02:28,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:28,184 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:28,261 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:28,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:28,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113580910] [2021-08-21 12:02:28,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113580910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:28,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159380819] [2021-08-21 12:02:28,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:02:28,262 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:28,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:28,263 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:28,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2021-08-21 12:02:29,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:02:29,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:29,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 12:02:29,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:29,390 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:29,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159380819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:29,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:29,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 12:02:29,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299848995] [2021-08-21 12:02:29,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:02:29,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:29,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:02:29,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:02:29,391 INFO L87 Difference]: Start difference. First operand 2018 states and 5686 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:29,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:29,504 INFO L93 Difference]: Finished difference Result 2226 states and 6046 transitions. [2021-08-21 12:02:29,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:02:29,505 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:02:29,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:29,507 INFO L225 Difference]: With dead ends: 2226 [2021-08-21 12:02:29,507 INFO L226 Difference]: Without dead ends: 2222 [2021-08-21 12:02:29,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:02:29,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2021-08-21 12:02:29,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 2035. [2021-08-21 12:02:29,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2035 states, 2034 states have (on average 2.8210422812192726) internal successors, (5738), 2034 states have internal predecessors, (5738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:29,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2035 states to 2035 states and 5738 transitions. [2021-08-21 12:02:29,532 INFO L78 Accepts]: Start accepts. Automaton has 2035 states and 5738 transitions. Word has length 20 [2021-08-21 12:02:29,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:29,532 INFO L470 AbstractCegarLoop]: Abstraction has 2035 states and 5738 transitions. [2021-08-21 12:02:29,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:29,532 INFO L276 IsEmpty]: Start isEmpty. Operand 2035 states and 5738 transitions. [2021-08-21 12:02:29,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:02:29,534 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:29,535 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:29,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:29,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-08-21 12:02:29,753 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:29,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:29,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1550708569, now seen corresponding path program 175 times [2021-08-21 12:02:29,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:29,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146844104] [2021-08-21 12:02:29,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:29,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:29,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:29,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:29,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146844104] [2021-08-21 12:02:29,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146844104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:29,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676984367] [2021-08-21 12:02:29,823 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:02:29,823 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:29,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:29,823 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:29,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2021-08-21 12:02:30,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:30,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:02:30,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:30,958 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:02:30,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676984367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:30,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:30,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-08-21 12:02:30,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376322506] [2021-08-21 12:02:30,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:02:30,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:30,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:02:30,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:02:30,959 INFO L87 Difference]: Start difference. First operand 2035 states and 5738 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:31,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:31,078 INFO L93 Difference]: Finished difference Result 2297 states and 6225 transitions. [2021-08-21 12:02:31,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:02:31,079 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 20 [2021-08-21 12:02:31,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:31,081 INFO L225 Difference]: With dead ends: 2297 [2021-08-21 12:02:31,081 INFO L226 Difference]: Without dead ends: 2289 [2021-08-21 12:02:31,082 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 101.7ms TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:02:31,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2021-08-21 12:02:31,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2035. [2021-08-21 12:02:31,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2035 states, 2034 states have (on average 2.8171091445427727) internal successors, (5730), 2034 states have internal predecessors, (5730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:31,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2035 states to 2035 states and 5730 transitions. [2021-08-21 12:02:31,107 INFO L78 Accepts]: Start accepts. Automaton has 2035 states and 5730 transitions. Word has length 20 [2021-08-21 12:02:31,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:31,107 INFO L470 AbstractCegarLoop]: Abstraction has 2035 states and 5730 transitions. [2021-08-21 12:02:31,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:31,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2035 states and 5730 transitions. [2021-08-21 12:02:31,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:02:31,109 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:31,109 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:31,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:31,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-08-21 12:02:31,328 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:31,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:31,328 INFO L82 PathProgramCache]: Analyzing trace with hash -818224649, now seen corresponding path program 176 times [2021-08-21 12:02:31,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:31,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765387745] [2021-08-21 12:02:31,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:31,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:31,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:31,405 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:31,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:31,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765387745] [2021-08-21 12:02:31,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765387745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:31,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731975815] [2021-08-21 12:02:31,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:02:31,405 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:31,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:31,406 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:31,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2021-08-21 12:02:32,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:02:32,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:32,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:02:32,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:32,534 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:32,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731975815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:32,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:32,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-08-21 12:02:32,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333814976] [2021-08-21 12:02:32,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:02:32,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:32,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:02:32,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:02:32,535 INFO L87 Difference]: Start difference. First operand 2035 states and 5730 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:32,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:32,672 INFO L93 Difference]: Finished difference Result 2315 states and 6243 transitions. [2021-08-21 12:02:32,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:02:32,672 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 20 [2021-08-21 12:02:32,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:32,675 INFO L225 Difference]: With dead ends: 2315 [2021-08-21 12:02:32,675 INFO L226 Difference]: Without dead ends: 2305 [2021-08-21 12:02:32,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 120.2ms TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:02:32,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-08-21 12:02:32,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 2049. [2021-08-21 12:02:32,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 2.81494140625) internal successors, (5765), 2048 states have internal predecessors, (5765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:32,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 5765 transitions. [2021-08-21 12:02:32,700 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 5765 transitions. Word has length 20 [2021-08-21 12:02:32,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:32,700 INFO L470 AbstractCegarLoop]: Abstraction has 2049 states and 5765 transitions. [2021-08-21 12:02:32,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:32,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 5765 transitions. [2021-08-21 12:02:32,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:02:32,703 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:32,703 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:32,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:32,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:32,921 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:32,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:32,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1240710375, now seen corresponding path program 177 times [2021-08-21 12:02:32,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:32,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18239429] [2021-08-21 12:02:32,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:32,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:32,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:32,996 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:32,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:32,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18239429] [2021-08-21 12:02:32,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18239429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:32,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871467088] [2021-08-21 12:02:32,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:02:32,996 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:32,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:32,997 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:32,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2021-08-21 12:02:34,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:02:34,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:34,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 12:02:34,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:34,146 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:34,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871467088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:34,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:34,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 12:02:34,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819467900] [2021-08-21 12:02:34,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:02:34,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:34,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:02:34,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:02:34,147 INFO L87 Difference]: Start difference. First operand 2049 states and 5765 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:34,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:34,326 INFO L93 Difference]: Finished difference Result 2542 states and 6859 transitions. [2021-08-21 12:02:34,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:02:34,327 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:02:34,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:34,330 INFO L225 Difference]: With dead ends: 2542 [2021-08-21 12:02:34,330 INFO L226 Difference]: Without dead ends: 2530 [2021-08-21 12:02:34,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 150.1ms TimeCoverageRelationStatistics Valid=244, Invalid=512, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:02:34,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-08-21 12:02:34,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2049. [2021-08-21 12:02:34,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 2.81396484375) internal successors, (5763), 2048 states have internal predecessors, (5763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:34,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 5763 transitions. [2021-08-21 12:02:34,357 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 5763 transitions. Word has length 20 [2021-08-21 12:02:34,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:34,357 INFO L470 AbstractCegarLoop]: Abstraction has 2049 states and 5763 transitions. [2021-08-21 12:02:34,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:34,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 5763 transitions. [2021-08-21 12:02:34,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:02:34,359 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:34,359 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:34,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:34,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:34,578 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:34,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:34,579 INFO L82 PathProgramCache]: Analyzing trace with hash -505793131, now seen corresponding path program 178 times [2021-08-21 12:02:34,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:34,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312330204] [2021-08-21 12:02:34,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:34,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:34,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:34,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312330204] [2021-08-21 12:02:34,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312330204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:34,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166485419] [2021-08-21 12:02:34,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:02:34,643 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:34,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:34,644 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:34,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2021-08-21 12:02:35,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:02:35,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:35,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 12:02:35,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:35,793 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:35,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166485419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:35,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:35,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:02:35,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512125785] [2021-08-21 12:02:35,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:02:35,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:35,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:02:35,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:02:35,794 INFO L87 Difference]: Start difference. First operand 2049 states and 5763 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:35,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:35,876 INFO L93 Difference]: Finished difference Result 2353 states and 6358 transitions. [2021-08-21 12:02:35,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:02:35,877 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:02:35,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:35,880 INFO L225 Difference]: With dead ends: 2353 [2021-08-21 12:02:35,880 INFO L226 Difference]: Without dead ends: 2353 [2021-08-21 12:02:35,880 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:02:35,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2021-08-21 12:02:35,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 2119. [2021-08-21 12:02:35,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 2.833805476864967) internal successors, (6002), 2118 states have internal predecessors, (6002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:35,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 6002 transitions. [2021-08-21 12:02:35,908 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 6002 transitions. Word has length 20 [2021-08-21 12:02:35,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:35,908 INFO L470 AbstractCegarLoop]: Abstraction has 2119 states and 6002 transitions. [2021-08-21 12:02:35,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:35,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 6002 transitions. [2021-08-21 12:02:35,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:02:35,910 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:35,910 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:35,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:36,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:36,119 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:36,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:36,120 INFO L82 PathProgramCache]: Analyzing trace with hash -981915051, now seen corresponding path program 179 times [2021-08-21 12:02:36,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:36,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849311484] [2021-08-21 12:02:36,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:36,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:36,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:36,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:36,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849311484] [2021-08-21 12:02:36,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849311484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:36,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732669642] [2021-08-21 12:02:36,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:02:36,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:36,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:36,207 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:36,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2021-08-21 12:02:37,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:02:37,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:37,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:02:37,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:37,355 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:37,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732669642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:37,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:37,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-08-21 12:02:37,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790688481] [2021-08-21 12:02:37,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:02:37,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:37,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:02:37,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:02:37,356 INFO L87 Difference]: Start difference. First operand 2119 states and 6002 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:37,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:37,501 INFO L93 Difference]: Finished difference Result 2638 states and 7183 transitions. [2021-08-21 12:02:37,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:02:37,501 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 20 [2021-08-21 12:02:37,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:37,505 INFO L225 Difference]: With dead ends: 2638 [2021-08-21 12:02:37,505 INFO L226 Difference]: Without dead ends: 2626 [2021-08-21 12:02:37,505 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 129.6ms TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:02:37,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-08-21 12:02:37,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 2119. [2021-08-21 12:02:37,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 2.8328611898016995) internal successors, (6000), 2118 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:37,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 6000 transitions. [2021-08-21 12:02:37,534 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 6000 transitions. Word has length 20 [2021-08-21 12:02:37,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:37,534 INFO L470 AbstractCegarLoop]: Abstraction has 2119 states and 6000 transitions. [2021-08-21 12:02:37,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:37,534 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 6000 transitions. [2021-08-21 12:02:37,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:02:37,537 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:37,537 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:37,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:37,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:37,748 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:37,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:37,748 INFO L82 PathProgramCache]: Analyzing trace with hash -984040581, now seen corresponding path program 180 times [2021-08-21 12:02:37,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:37,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527310151] [2021-08-21 12:02:37,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:37,748 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:37,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:37,809 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:37,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:37,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527310151] [2021-08-21 12:02:37,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527310151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:37,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472529549] [2021-08-21 12:02:37,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:02:37,810 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:37,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:37,811 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:37,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2021-08-21 12:02:38,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:02:38,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:38,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 12:02:38,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:38,948 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:38,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472529549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:38,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:38,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 12:02:38,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180313400] [2021-08-21 12:02:38,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:02:38,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:38,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:02:38,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:02:38,949 INFO L87 Difference]: Start difference. First operand 2119 states and 6000 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:39,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:39,006 INFO L93 Difference]: Finished difference Result 2606 states and 7111 transitions. [2021-08-21 12:02:39,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:02:39,006 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:02:39,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:39,010 INFO L225 Difference]: With dead ends: 2606 [2021-08-21 12:02:39,010 INFO L226 Difference]: Without dead ends: 2606 [2021-08-21 12:02:39,010 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:02:39,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-08-21 12:02:39,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 2338. [2021-08-21 12:02:39,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2338 states, 2337 states have (on average 2.868635002139495) internal successors, (6704), 2337 states have internal predecessors, (6704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:39,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6704 transitions. [2021-08-21 12:02:39,070 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6704 transitions. Word has length 20 [2021-08-21 12:02:39,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:39,070 INFO L470 AbstractCegarLoop]: Abstraction has 2338 states and 6704 transitions. [2021-08-21 12:02:39,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:39,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6704 transitions. [2021-08-21 12:02:39,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:02:39,073 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:39,073 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:39,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2021-08-21 12:02:39,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-08-21 12:02:39,292 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:39,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:39,292 INFO L82 PathProgramCache]: Analyzing trace with hash -69754791, now seen corresponding path program 181 times [2021-08-21 12:02:39,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:39,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580502349] [2021-08-21 12:02:39,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:39,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:39,347 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:39,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:39,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580502349] [2021-08-21 12:02:39,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580502349] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:39,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296135634] [2021-08-21 12:02:39,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:02:39,348 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:39,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:39,349 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:39,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2021-08-21 12:02:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:40,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:02:40,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:40,507 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 35 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:40,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296135634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:40,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:40,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-08-21 12:02:40,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443251372] [2021-08-21 12:02:40,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:02:40,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:40,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:02:40,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:02:40,508 INFO L87 Difference]: Start difference. First operand 2338 states and 6704 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:40,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:40,565 INFO L93 Difference]: Finished difference Result 2558 states and 7012 transitions. [2021-08-21 12:02:40,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:02:40,565 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:02:40,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:40,569 INFO L225 Difference]: With dead ends: 2558 [2021-08-21 12:02:40,569 INFO L226 Difference]: Without dead ends: 2558 [2021-08-21 12:02:40,569 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:02:40,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2558 states. [2021-08-21 12:02:40,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2558 to 2337. [2021-08-21 12:02:40,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 2336 states have (on average 2.8677226027397262) internal successors, (6699), 2336 states have internal predecessors, (6699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:40,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 6699 transitions. [2021-08-21 12:02:40,602 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 6699 transitions. Word has length 20 [2021-08-21 12:02:40,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:40,602 INFO L470 AbstractCegarLoop]: Abstraction has 2337 states and 6699 transitions. [2021-08-21 12:02:40,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:40,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 6699 transitions. [2021-08-21 12:02:40,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:02:40,605 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:40,605 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:40,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:40,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:40,812 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:40,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:40,812 INFO L82 PathProgramCache]: Analyzing trace with hash 785551863, now seen corresponding path program 182 times [2021-08-21 12:02:40,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:40,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539524957] [2021-08-21 12:02:40,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:40,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 26 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:40,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:40,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539524957] [2021-08-21 12:02:40,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539524957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:40,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699000809] [2021-08-21 12:02:40,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:02:40,883 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:40,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:40,883 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:40,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2021-08-21 12:02:41,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:02:41,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:41,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:02:41,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:42,007 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 31 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:02:42,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699000809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:42,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:42,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-08-21 12:02:42,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963154295] [2021-08-21 12:02:42,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:02:42,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:42,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:02:42,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:02:42,008 INFO L87 Difference]: Start difference. First operand 2337 states and 6699 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:42,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:42,112 INFO L93 Difference]: Finished difference Result 2560 states and 7019 transitions. [2021-08-21 12:02:42,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:02:42,113 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 20 [2021-08-21 12:02:42,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:42,116 INFO L225 Difference]: With dead ends: 2560 [2021-08-21 12:02:42,116 INFO L226 Difference]: Without dead ends: 2558 [2021-08-21 12:02:42,116 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:02:42,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2558 states. [2021-08-21 12:02:42,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2558 to 2337. [2021-08-21 12:02:42,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 2336 states have (on average 2.866866438356164) internal successors, (6697), 2336 states have internal predecessors, (6697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:42,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 6697 transitions. [2021-08-21 12:02:42,145 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 6697 transitions. Word has length 20 [2021-08-21 12:02:42,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:42,145 INFO L470 AbstractCegarLoop]: Abstraction has 2337 states and 6697 transitions. [2021-08-21 12:02:42,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:42,145 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 6697 transitions. [2021-08-21 12:02:42,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:02:42,148 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:42,148 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:42,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:42,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:42,366 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:42,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:42,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1530254361, now seen corresponding path program 183 times [2021-08-21 12:02:42,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:42,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195533166] [2021-08-21 12:02:42,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:42,367 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:42,424 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:42,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:42,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195533166] [2021-08-21 12:02:42,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195533166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:42,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384496372] [2021-08-21 12:02:42,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:02:42,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:42,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:42,425 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:42,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2021-08-21 12:02:43,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:02:43,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:43,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 12:02:43,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:43,620 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:43,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384496372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:43,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:43,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 12:02:43,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281828771] [2021-08-21 12:02:43,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:02:43,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:43,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:02:43,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:02:43,621 INFO L87 Difference]: Start difference. First operand 2337 states and 6697 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:43,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:43,747 INFO L93 Difference]: Finished difference Result 2566 states and 7025 transitions. [2021-08-21 12:02:43,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:02:43,747 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:02:43,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:43,750 INFO L225 Difference]: With dead ends: 2566 [2021-08-21 12:02:43,750 INFO L226 Difference]: Without dead ends: 2562 [2021-08-21 12:02:43,751 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 86.0ms TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:02:43,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2021-08-21 12:02:43,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 2344. [2021-08-21 12:02:43,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2343 states have (on average 2.8681177976952625) internal successors, (6720), 2343 states have internal predecessors, (6720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:43,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 6720 transitions. [2021-08-21 12:02:43,780 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 6720 transitions. Word has length 20 [2021-08-21 12:02:43,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:43,780 INFO L470 AbstractCegarLoop]: Abstraction has 2344 states and 6720 transitions. [2021-08-21 12:02:43,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:43,780 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 6720 transitions. [2021-08-21 12:02:43,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:02:43,783 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:43,783 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:43,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:43,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:43,991 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:43,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:43,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1153771977, now seen corresponding path program 184 times [2021-08-21 12:02:43,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:43,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225560563] [2021-08-21 12:02:43,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:43,991 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:44,057 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:44,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:44,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225560563] [2021-08-21 12:02:44,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225560563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:44,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372269258] [2021-08-21 12:02:44,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:02:44,058 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:44,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:44,059 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:44,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2021-08-21 12:02:45,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:02:45,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:45,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:02:45,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:45,249 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:02:45,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372269258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:45,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:45,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-08-21 12:02:45,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934964264] [2021-08-21 12:02:45,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:02:45,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:45,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:02:45,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:02:45,250 INFO L87 Difference]: Start difference. First operand 2344 states and 6720 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:45,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:45,358 INFO L93 Difference]: Finished difference Result 3250 states and 8935 transitions. [2021-08-21 12:02:45,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:02:45,359 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:02:45,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:45,363 INFO L225 Difference]: With dead ends: 3250 [2021-08-21 12:02:45,363 INFO L226 Difference]: Without dead ends: 3244 [2021-08-21 12:02:45,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:02:45,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2021-08-21 12:02:45,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 2344. [2021-08-21 12:02:45,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2343 states have (on average 2.8659837814767393) internal successors, (6715), 2343 states have internal predecessors, (6715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:45,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 6715 transitions. [2021-08-21 12:02:45,399 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 6715 transitions. Word has length 20 [2021-08-21 12:02:45,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:45,399 INFO L470 AbstractCegarLoop]: Abstraction has 2344 states and 6715 transitions. [2021-08-21 12:02:45,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:45,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 6715 transitions. [2021-08-21 12:02:45,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:02:45,402 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:45,402 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:45,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:45,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:45,617 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:45,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:45,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1540757465, now seen corresponding path program 185 times [2021-08-21 12:02:45,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:45,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979639182] [2021-08-21 12:02:45,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:45,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:45,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:45,690 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:45,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:45,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979639182] [2021-08-21 12:02:45,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979639182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:45,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479381987] [2021-08-21 12:02:45,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:02:45,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:45,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:45,691 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:45,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2021-08-21 12:02:46,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:02:46,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:46,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:02:46,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:46,789 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:46,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479381987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:46,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:46,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-08-21 12:02:46,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161112686] [2021-08-21 12:02:46,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:02:46,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:46,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:02:46,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:02:46,790 INFO L87 Difference]: Start difference. First operand 2344 states and 6715 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:46,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:46,914 INFO L93 Difference]: Finished difference Result 3266 states and 8950 transitions. [2021-08-21 12:02:46,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:02:46,914 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 20 [2021-08-21 12:02:46,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:46,918 INFO L225 Difference]: With dead ends: 3266 [2021-08-21 12:02:46,918 INFO L226 Difference]: Without dead ends: 3258 [2021-08-21 12:02:46,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 102.7ms TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:02:46,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3258 states. [2021-08-21 12:02:46,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3258 to 2360. [2021-08-21 12:02:46,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 2.8651971174226367) internal successors, (6759), 2359 states have internal predecessors, (6759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:46,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 6759 transitions. [2021-08-21 12:02:46,950 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 6759 transitions. Word has length 20 [2021-08-21 12:02:46,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:46,950 INFO L470 AbstractCegarLoop]: Abstraction has 2360 states and 6759 transitions. [2021-08-21 12:02:46,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:46,950 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 6759 transitions. [2021-08-21 12:02:46,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:02:46,953 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:46,953 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:46,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2021-08-21 12:02:47,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:47,169 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:47,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:47,170 INFO L82 PathProgramCache]: Analyzing trace with hash -828175753, now seen corresponding path program 186 times [2021-08-21 12:02:47,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:47,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370405996] [2021-08-21 12:02:47,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:47,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:47,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:47,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370405996] [2021-08-21 12:02:47,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370405996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:47,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784135538] [2021-08-21 12:02:47,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:02:47,249 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:47,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:47,250 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:47,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2021-08-21 12:02:48,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:02:48,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:48,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 12:02:48,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:48,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784135538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:48,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:48,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 12:02:48,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118399525] [2021-08-21 12:02:48,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:02:48,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:48,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:02:48,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:02:48,510 INFO L87 Difference]: Start difference. First operand 2360 states and 6759 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:48,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:48,682 INFO L93 Difference]: Finished difference Result 3110 states and 8576 transitions. [2021-08-21 12:02:48,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:02:48,683 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:02:48,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:48,687 INFO L225 Difference]: With dead ends: 3110 [2021-08-21 12:02:48,687 INFO L226 Difference]: Without dead ends: 3100 [2021-08-21 12:02:48,687 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:02:48,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2021-08-21 12:02:48,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 2360. [2021-08-21 12:02:48,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 2.864349300551081) internal successors, (6757), 2359 states have internal predecessors, (6757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:48,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 6757 transitions. [2021-08-21 12:02:48,716 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 6757 transitions. Word has length 20 [2021-08-21 12:02:48,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:48,716 INFO L470 AbstractCegarLoop]: Abstraction has 2360 states and 6757 transitions. [2021-08-21 12:02:48,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:48,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 6757 transitions. [2021-08-21 12:02:48,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:02:48,719 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:48,719 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:48,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:48,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-08-21 12:02:48,937 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:48,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:48,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1250661479, now seen corresponding path program 187 times [2021-08-21 12:02:48,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:48,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318016439] [2021-08-21 12:02:48,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:48,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:49,020 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:49,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:49,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318016439] [2021-08-21 12:02:49,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318016439] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:49,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668041727] [2021-08-21 12:02:49,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:02:49,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:49,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:49,021 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:49,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2021-08-21 12:02:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:50,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:02:50,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:50,241 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:50,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668041727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:50,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:50,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-08-21 12:02:50,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151454333] [2021-08-21 12:02:50,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:02:50,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:50,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:02:50,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:02:50,242 INFO L87 Difference]: Start difference. First operand 2360 states and 6757 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:50,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:50,386 INFO L93 Difference]: Finished difference Result 3131 states and 8597 transitions. [2021-08-21 12:02:50,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:02:50,386 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 20 [2021-08-21 12:02:50,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:50,390 INFO L225 Difference]: With dead ends: 3131 [2021-08-21 12:02:50,390 INFO L226 Difference]: Without dead ends: 3119 [2021-08-21 12:02:50,390 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:02:50,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3119 states. [2021-08-21 12:02:50,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3119 to 2366. [2021-08-21 12:02:50,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2366 states, 2365 states have (on average 2.86384778012685) internal successors, (6773), 2365 states have internal predecessors, (6773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:50,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2366 states to 2366 states and 6773 transitions. [2021-08-21 12:02:50,419 INFO L78 Accepts]: Start accepts. Automaton has 2366 states and 6773 transitions. Word has length 20 [2021-08-21 12:02:50,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:50,419 INFO L470 AbstractCegarLoop]: Abstraction has 2366 states and 6773 transitions. [2021-08-21 12:02:50,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:50,419 INFO L276 IsEmpty]: Start isEmpty. Operand 2366 states and 6773 transitions. [2021-08-21 12:02:50,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:02:50,421 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:50,421 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:50,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:50,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-08-21 12:02:50,642 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:50,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:50,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1462817097, now seen corresponding path program 188 times [2021-08-21 12:02:50,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:50,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38864808] [2021-08-21 12:02:50,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:50,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:50,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:50,729 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:50,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:50,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38864808] [2021-08-21 12:02:50,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38864808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:50,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568065627] [2021-08-21 12:02:50,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:02:50,730 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:50,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:50,730 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:50,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2021-08-21 12:02:51,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:02:51,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:51,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:02:51,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:51,947 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 35 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:51,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568065627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:51,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:51,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-08-21 12:02:51,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201156326] [2021-08-21 12:02:51,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:02:51,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:51,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:02:51,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:02:51,948 INFO L87 Difference]: Start difference. First operand 2366 states and 6773 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:52,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:52,091 INFO L93 Difference]: Finished difference Result 2537 states and 7165 transitions. [2021-08-21 12:02:52,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:02:52,092 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 20 [2021-08-21 12:02:52,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:52,095 INFO L225 Difference]: With dead ends: 2537 [2021-08-21 12:02:52,095 INFO L226 Difference]: Without dead ends: 2530 [2021-08-21 12:02:52,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 155.7ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:02:52,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-08-21 12:02:52,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2366. [2021-08-21 12:02:52,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2366 states, 2365 states have (on average 2.8634249471458775) internal successors, (6772), 2365 states have internal predecessors, (6772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:52,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2366 states to 2366 states and 6772 transitions. [2021-08-21 12:02:52,121 INFO L78 Accepts]: Start accepts. Automaton has 2366 states and 6772 transitions. Word has length 20 [2021-08-21 12:02:52,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:52,121 INFO L470 AbstractCegarLoop]: Abstraction has 2366 states and 6772 transitions. [2021-08-21 12:02:52,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:52,121 INFO L276 IsEmpty]: Start isEmpty. Operand 2366 states and 6772 transitions. [2021-08-21 12:02:52,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:02:52,123 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:52,123 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:52,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2021-08-21 12:02:52,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:52,332 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:52,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:52,332 INFO L82 PathProgramCache]: Analyzing trace with hash -480825342, now seen corresponding path program 189 times [2021-08-21 12:02:52,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:52,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165244801] [2021-08-21 12:02:52,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:52,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:52,403 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:52,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:52,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165244801] [2021-08-21 12:02:52,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165244801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:52,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293837885] [2021-08-21 12:02:52,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:02:52,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:52,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:52,408 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:52,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2021-08-21 12:02:53,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:02:53,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:53,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:02:53,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:53,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:02:53,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-08-21 12:02:56,101 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:56,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293837885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:56,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:56,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-08-21 12:02:56,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171698828] [2021-08-21 12:02:56,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:02:56,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:56,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:02:56,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:02:56,103 INFO L87 Difference]: Start difference. First operand 2366 states and 6772 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:56,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:56,268 INFO L93 Difference]: Finished difference Result 2544 states and 7131 transitions. [2021-08-21 12:02:56,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:02:56,268 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:02:56,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:56,272 INFO L225 Difference]: With dead ends: 2544 [2021-08-21 12:02:56,272 INFO L226 Difference]: Without dead ends: 2541 [2021-08-21 12:02:56,272 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 185.8ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:02:56,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2021-08-21 12:02:56,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 2438. [2021-08-21 12:02:56,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2438 states, 2437 states have (on average 2.8654082888797703) internal successors, (6983), 2437 states have internal predecessors, (6983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:56,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2438 states to 2438 states and 6983 transitions. [2021-08-21 12:02:56,298 INFO L78 Accepts]: Start accepts. Automaton has 2438 states and 6983 transitions. Word has length 21 [2021-08-21 12:02:56,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:56,299 INFO L470 AbstractCegarLoop]: Abstraction has 2438 states and 6983 transitions. [2021-08-21 12:02:56,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:56,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2438 states and 6983 transitions. [2021-08-21 12:02:56,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:02:56,301 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:56,301 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:56,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:56,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:56,520 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:56,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:56,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1877056604, now seen corresponding path program 190 times [2021-08-21 12:02:56,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:56,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814166206] [2021-08-21 12:02:56,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:56,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:56,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:56,586 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:56,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:56,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814166206] [2021-08-21 12:02:56,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814166206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:56,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652137354] [2021-08-21 12:02:56,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:02:56,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:56,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:56,587 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:56,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2021-08-21 12:02:57,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:02:57,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:57,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:02:57,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:58,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:02:58,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-08-21 12:02:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:59,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652137354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:59,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:59,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-08-21 12:02:59,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411121652] [2021-08-21 12:02:59,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:02:59,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:59,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:02:59,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:02:59,123 INFO L87 Difference]: Start difference. First operand 2438 states and 6983 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:59,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:59,334 INFO L93 Difference]: Finished difference Result 2625 states and 7347 transitions. [2021-08-21 12:02:59,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:02:59,335 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:02:59,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:59,338 INFO L225 Difference]: With dead ends: 2625 [2021-08-21 12:02:59,338 INFO L226 Difference]: Without dead ends: 2622 [2021-08-21 12:02:59,338 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 179.1ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:02:59,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2622 states. [2021-08-21 12:02:59,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2622 to 2485. [2021-08-21 12:02:59,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2485 states, 2484 states have (on average 2.8747987117552336) internal successors, (7141), 2484 states have internal predecessors, (7141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:59,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2485 states to 2485 states and 7141 transitions. [2021-08-21 12:02:59,365 INFO L78 Accepts]: Start accepts. Automaton has 2485 states and 7141 transitions. Word has length 21 [2021-08-21 12:02:59,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:59,365 INFO L470 AbstractCegarLoop]: Abstraction has 2485 states and 7141 transitions. [2021-08-21 12:02:59,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:59,366 INFO L276 IsEmpty]: Start isEmpty. Operand 2485 states and 7141 transitions. [2021-08-21 12:02:59,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:02:59,368 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:59,368 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:59,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:59,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:59,586 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:59,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:59,586 INFO L82 PathProgramCache]: Analyzing trace with hash 950508400, now seen corresponding path program 191 times [2021-08-21 12:02:59,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:59,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046039920] [2021-08-21 12:02:59,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:59,587 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:59,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:59,663 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:02:59,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:59,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046039920] [2021-08-21 12:02:59,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046039920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:59,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566079036] [2021-08-21 12:02:59,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:02:59,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:59,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:59,666 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:59,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2021-08-21 12:03:00,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:03:00,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:00,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:03:00,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:01,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:03:01,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-08-21 12:03:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:04,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566079036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:04,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:04,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-08-21 12:03:04,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015918041] [2021-08-21 12:03:04,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:03:04,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:04,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:03:04,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:03:04,382 INFO L87 Difference]: Start difference. First operand 2485 states and 7141 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:04,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:04,594 INFO L93 Difference]: Finished difference Result 2693 states and 7567 transitions. [2021-08-21 12:03:04,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:03:04,594 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:03:04,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:04,598 INFO L225 Difference]: With dead ends: 2693 [2021-08-21 12:03:04,599 INFO L226 Difference]: Without dead ends: 2690 [2021-08-21 12:03:04,599 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 190.9ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:03:04,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2021-08-21 12:03:04,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 2542. [2021-08-21 12:03:04,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2542 states, 2541 states have (on average 2.8890200708382525) internal successors, (7341), 2541 states have internal predecessors, (7341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:04,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2542 states to 2542 states and 7341 transitions. [2021-08-21 12:03:04,633 INFO L78 Accepts]: Start accepts. Automaton has 2542 states and 7341 transitions. Word has length 21 [2021-08-21 12:03:04,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:04,633 INFO L470 AbstractCegarLoop]: Abstraction has 2542 states and 7341 transitions. [2021-08-21 12:03:04,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:04,634 INFO L276 IsEmpty]: Start isEmpty. Operand 2542 states and 7341 transitions. [2021-08-21 12:03:04,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:03:04,636 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:04,637 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:04,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:04,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:04,856 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:04,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:04,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1589289692, now seen corresponding path program 192 times [2021-08-21 12:03:04,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:04,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261840450] [2021-08-21 12:03:04,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:04,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:04,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:04,954 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:04,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:04,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261840450] [2021-08-21 12:03:04,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261840450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:04,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662504612] [2021-08-21 12:03:04,954 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:03:04,955 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:04,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:04,955 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:04,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2021-08-21 12:03:06,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:03:06,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:06,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:03:06,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:06,535 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:03:06,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-08-21 12:03:08,713 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:08,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662504612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:08,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:08,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-08-21 12:03:08,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323940218] [2021-08-21 12:03:08,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:03:08,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:08,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:03:08,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:03:08,714 INFO L87 Difference]: Start difference. First operand 2542 states and 7341 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:09,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:09,012 INFO L93 Difference]: Finished difference Result 2759 states and 7794 transitions. [2021-08-21 12:03:09,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:03:09,013 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:03:09,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:09,017 INFO L225 Difference]: With dead ends: 2759 [2021-08-21 12:03:09,017 INFO L226 Difference]: Without dead ends: 2756 [2021-08-21 12:03:09,017 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 202.7ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:03:09,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2021-08-21 12:03:09,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 2603. [2021-08-21 12:03:09,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.9058416602613373) internal successors, (7561), 2602 states have internal predecessors, (7561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:09,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7561 transitions. [2021-08-21 12:03:09,049 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7561 transitions. Word has length 21 [2021-08-21 12:03:09,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:09,049 INFO L470 AbstractCegarLoop]: Abstraction has 2603 states and 7561 transitions. [2021-08-21 12:03:09,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:09,049 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7561 transitions. [2021-08-21 12:03:09,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:03:09,051 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:09,051 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:09,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:09,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:09,264 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:09,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:09,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1281348080, now seen corresponding path program 193 times [2021-08-21 12:03:09,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:09,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217821753] [2021-08-21 12:03:09,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:09,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:09,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:09,335 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:03:09,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:09,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217821753] [2021-08-21 12:03:09,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217821753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:09,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794299607] [2021-08-21 12:03:09,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:03:09,335 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:09,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:09,336 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:09,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2021-08-21 12:03:10,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:10,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:03:10,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:10,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:03:10,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-08-21 12:03:12,293 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:12,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794299607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:12,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:12,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-08-21 12:03:12,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746385763] [2021-08-21 12:03:12,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:03:12,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:12,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:03:12,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:03:12,294 INFO L87 Difference]: Start difference. First operand 2603 states and 7561 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:12,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:12,512 INFO L93 Difference]: Finished difference Result 2862 states and 8127 transitions. [2021-08-21 12:03:12,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:03:12,512 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:03:12,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:12,517 INFO L225 Difference]: With dead ends: 2862 [2021-08-21 12:03:12,517 INFO L226 Difference]: Without dead ends: 2859 [2021-08-21 12:03:12,517 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 232.8ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:03:12,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2021-08-21 12:03:12,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 2694. [2021-08-21 12:03:12,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2694 states, 2693 states have (on average 2.9272187151875233) internal successors, (7883), 2693 states have internal predecessors, (7883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:12,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2694 states to 2694 states and 7883 transitions. [2021-08-21 12:03:12,554 INFO L78 Accepts]: Start accepts. Automaton has 2694 states and 7883 transitions. Word has length 21 [2021-08-21 12:03:12,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:12,555 INFO L470 AbstractCegarLoop]: Abstraction has 2694 states and 7883 transitions. [2021-08-21 12:03:12,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:12,555 INFO L276 IsEmpty]: Start isEmpty. Operand 2694 states and 7883 transitions. [2021-08-21 12:03:12,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:03:12,558 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:12,558 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:12,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2021-08-21 12:03:12,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:12,761 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:12,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:12,761 INFO L82 PathProgramCache]: Analyzing trace with hash 76805796, now seen corresponding path program 194 times [2021-08-21 12:03:12,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:12,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792832482] [2021-08-21 12:03:12,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:12,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:12,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:12,863 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:12,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:12,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792832482] [2021-08-21 12:03:12,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792832482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:12,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429337196] [2021-08-21 12:03:12,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:03:12,864 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:12,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:12,864 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:12,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2021-08-21 12:03:14,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:03:14,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:14,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:03:14,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:14,338 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:03:14,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-08-21 12:03:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:16,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429337196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:16,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:16,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-08-21 12:03:16,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431514860] [2021-08-21 12:03:16,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:03:16,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:16,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:03:16,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:03:16,866 INFO L87 Difference]: Start difference. First operand 2694 states and 7883 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:17,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:17,087 INFO L93 Difference]: Finished difference Result 2956 states and 8451 transitions. [2021-08-21 12:03:17,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:03:17,087 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:03:17,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:17,091 INFO L225 Difference]: With dead ends: 2956 [2021-08-21 12:03:17,091 INFO L226 Difference]: Without dead ends: 2953 [2021-08-21 12:03:17,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 193.0ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:03:17,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2953 states. [2021-08-21 12:03:17,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2953 to 2783. [2021-08-21 12:03:17,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2782 states have (on average 2.948957584471603) internal successors, (8204), 2782 states have internal predecessors, (8204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:17,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 8204 transitions. [2021-08-21 12:03:17,122 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 8204 transitions. Word has length 21 [2021-08-21 12:03:17,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:17,122 INFO L470 AbstractCegarLoop]: Abstraction has 2783 states and 8204 transitions. [2021-08-21 12:03:17,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:17,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 8204 transitions. [2021-08-21 12:03:17,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:03:17,125 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:17,125 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:17,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:17,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:17,344 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:17,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:17,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1390700656, now seen corresponding path program 195 times [2021-08-21 12:03:17,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:17,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366496572] [2021-08-21 12:03:17,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:17,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:17,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:17,411 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:03:17,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:17,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366496572] [2021-08-21 12:03:17,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366496572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:17,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814552814] [2021-08-21 12:03:17,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:03:17,412 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:17,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:17,412 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:17,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2021-08-21 12:03:18,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:03:18,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:18,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:03:18,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:19,037 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:03:19,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-08-21 12:03:21,060 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:21,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814552814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:21,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:21,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-08-21 12:03:21,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768886893] [2021-08-21 12:03:21,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:03:21,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:21,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:03:21,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:03:21,061 INFO L87 Difference]: Start difference. First operand 2783 states and 8204 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:21,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:21,367 INFO L93 Difference]: Finished difference Result 3102 states and 8955 transitions. [2021-08-21 12:03:21,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:03:21,367 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:03:21,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:21,411 INFO L225 Difference]: With dead ends: 3102 [2021-08-21 12:03:21,411 INFO L226 Difference]: Without dead ends: 3099 [2021-08-21 12:03:21,412 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:03:21,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3099 states. [2021-08-21 12:03:21,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3099 to 2942. [2021-08-21 12:03:21,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2942 states, 2941 states have (on average 2.971438286297178) internal successors, (8739), 2941 states have internal predecessors, (8739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:21,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2942 states to 2942 states and 8739 transitions. [2021-08-21 12:03:21,445 INFO L78 Accepts]: Start accepts. Automaton has 2942 states and 8739 transitions. Word has length 21 [2021-08-21 12:03:21,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:21,445 INFO L470 AbstractCegarLoop]: Abstraction has 2942 states and 8739 transitions. [2021-08-21 12:03:21,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:21,445 INFO L276 IsEmpty]: Start isEmpty. Operand 2942 states and 8739 transitions. [2021-08-21 12:03:21,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:03:21,448 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:21,448 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:21,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:21,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:21,661 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:21,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:21,662 INFO L82 PathProgramCache]: Analyzing trace with hash -828231644, now seen corresponding path program 196 times [2021-08-21 12:03:21,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:21,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715916615] [2021-08-21 12:03:21,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:21,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:21,728 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:21,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:21,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715916615] [2021-08-21 12:03:21,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715916615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:21,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721887391] [2021-08-21 12:03:21,729 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:03:21,729 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:21,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:21,729 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:21,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2021-08-21 12:03:22,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:03:22,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:22,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:03:22,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:23,324 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:03:23,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-08-21 12:03:25,702 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:25,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721887391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:25,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:25,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-08-21 12:03:25,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570058180] [2021-08-21 12:03:25,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:03:25,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:25,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:03:25,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:03:25,703 INFO L87 Difference]: Start difference. First operand 2942 states and 8739 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:25,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:25,959 INFO L93 Difference]: Finished difference Result 3588 states and 10429 transitions. [2021-08-21 12:03:25,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:03:25,959 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:03:25,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:25,968 INFO L225 Difference]: With dead ends: 3588 [2021-08-21 12:03:25,968 INFO L226 Difference]: Without dead ends: 3585 [2021-08-21 12:03:25,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 180.6ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:03:25,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3585 states. [2021-08-21 12:03:26,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3585 to 3429. [2021-08-21 12:03:26,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3428 states have (on average 2.982497082847141) internal successors, (10224), 3428 states have internal predecessors, (10224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:26,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 10224 transitions. [2021-08-21 12:03:26,023 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 10224 transitions. Word has length 21 [2021-08-21 12:03:26,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:26,023 INFO L470 AbstractCegarLoop]: Abstraction has 3429 states and 10224 transitions. [2021-08-21 12:03:26,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:26,023 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 10224 transitions. [2021-08-21 12:03:26,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:03:26,027 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:26,027 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:26,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:26,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-08-21 12:03:26,241 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:26,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:26,241 INFO L82 PathProgramCache]: Analyzing trace with hash -895656208, now seen corresponding path program 197 times [2021-08-21 12:03:26,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:26,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654306323] [2021-08-21 12:03:26,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:26,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:26,309 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:26,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:26,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654306323] [2021-08-21 12:03:26,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654306323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:26,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091738579] [2021-08-21 12:03:26,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:03:26,310 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:26,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:26,310 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:26,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2021-08-21 12:03:27,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:03:27,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:27,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:03:27,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:27,958 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:03:27,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-08-21 12:03:30,194 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:30,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091738579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:30,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:30,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-08-21 12:03:30,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175784088] [2021-08-21 12:03:30,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:03:30,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:30,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:03:30,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:03:30,195 INFO L87 Difference]: Start difference. First operand 3429 states and 10224 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:30,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:30,476 INFO L93 Difference]: Finished difference Result 3995 states and 11677 transitions. [2021-08-21 12:03:30,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:03:30,476 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:03:30,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:30,483 INFO L225 Difference]: With dead ends: 3995 [2021-08-21 12:03:30,483 INFO L226 Difference]: Without dead ends: 3992 [2021-08-21 12:03:30,483 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 184.3ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:03:30,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3992 states. [2021-08-21 12:03:30,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3992 to 3844. [2021-08-21 12:03:30,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3844 states, 3843 states have (on average 2.988290398126464) internal successors, (11484), 3843 states have internal predecessors, (11484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:30,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3844 states to 3844 states and 11484 transitions. [2021-08-21 12:03:30,547 INFO L78 Accepts]: Start accepts. Automaton has 3844 states and 11484 transitions. Word has length 21 [2021-08-21 12:03:30,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:30,547 INFO L470 AbstractCegarLoop]: Abstraction has 3844 states and 11484 transitions. [2021-08-21 12:03:30,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:30,547 INFO L276 IsEmpty]: Start isEmpty. Operand 3844 states and 11484 transitions. [2021-08-21 12:03:30,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:03:30,552 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:30,552 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:30,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:30,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-08-21 12:03:30,773 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:30,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:30,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1997605533, now seen corresponding path program 198 times [2021-08-21 12:03:30,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:30,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935313324] [2021-08-21 12:03:30,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:30,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:30,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:30,872 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:30,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:30,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935313324] [2021-08-21 12:03:30,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935313324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:30,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018870904] [2021-08-21 12:03:30,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:03:30,873 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:30,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:30,873 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:30,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2021-08-21 12:03:32,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:03:32,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:32,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:03:32,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:32,130 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:32,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018870904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:32,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:32,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:03:32,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722355996] [2021-08-21 12:03:32,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:03:32,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:32,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:03:32,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:03:32,131 INFO L87 Difference]: Start difference. First operand 3844 states and 11484 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:32,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:32,380 INFO L93 Difference]: Finished difference Result 4233 states and 12095 transitions. [2021-08-21 12:03:32,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 12:03:32,381 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:03:32,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:32,386 INFO L225 Difference]: With dead ends: 4233 [2021-08-21 12:03:32,386 INFO L226 Difference]: Without dead ends: 4222 [2021-08-21 12:03:32,387 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 208.9ms TimeCoverageRelationStatistics Valid=374, Invalid=748, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:03:32,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4222 states. [2021-08-21 12:03:32,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4222 to 3856. [2021-08-21 12:03:32,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3856 states, 3855 states have (on average 2.988586251621271) internal successors, (11521), 3855 states have internal predecessors, (11521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:32,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3856 states to 3856 states and 11521 transitions. [2021-08-21 12:03:32,469 INFO L78 Accepts]: Start accepts. Automaton has 3856 states and 11521 transitions. Word has length 22 [2021-08-21 12:03:32,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:32,469 INFO L470 AbstractCegarLoop]: Abstraction has 3856 states and 11521 transitions. [2021-08-21 12:03:32,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:32,470 INFO L276 IsEmpty]: Start isEmpty. Operand 3856 states and 11521 transitions. [2021-08-21 12:03:32,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:03:32,473 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:32,473 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:32,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2021-08-21 12:03:32,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-08-21 12:03:32,689 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:32,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:32,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1334148087, now seen corresponding path program 199 times [2021-08-21 12:03:32,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:32,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243554887] [2021-08-21 12:03:32,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:32,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:32,808 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 28 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:32,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:32,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243554887] [2021-08-21 12:03:32,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243554887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:32,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618804184] [2021-08-21 12:03:32,809 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:03:32,809 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:32,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:32,809 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:32,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2021-08-21 12:03:34,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:34,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:03:34,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 36 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:34,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618804184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:34,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:34,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:03:34,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621941848] [2021-08-21 12:03:34,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:03:34,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:34,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:03:34,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:03:34,151 INFO L87 Difference]: Start difference. First operand 3856 states and 11521 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:34,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:34,346 INFO L93 Difference]: Finished difference Result 4047 states and 11799 transitions. [2021-08-21 12:03:34,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:03:34,347 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:03:34,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:34,353 INFO L225 Difference]: With dead ends: 4047 [2021-08-21 12:03:34,353 INFO L226 Difference]: Without dead ends: 4029 [2021-08-21 12:03:34,353 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 193.8ms TimeCoverageRelationStatistics Valid=286, Invalid=584, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:03:34,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4029 states. [2021-08-21 12:03:34,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4029 to 3828. [2021-08-21 12:03:34,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3827 states have (on average 2.9832767180559183) internal successors, (11417), 3827 states have internal predecessors, (11417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:34,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 11417 transitions. [2021-08-21 12:03:34,415 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 11417 transitions. Word has length 22 [2021-08-21 12:03:34,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:34,415 INFO L470 AbstractCegarLoop]: Abstraction has 3828 states and 11417 transitions. [2021-08-21 12:03:34,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:34,415 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 11417 transitions. [2021-08-21 12:03:34,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:03:34,420 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:34,420 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:34,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:34,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-08-21 12:03:34,633 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:34,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:34,633 INFO L82 PathProgramCache]: Analyzing trace with hash 852202615, now seen corresponding path program 200 times [2021-08-21 12:03:34,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:34,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250937523] [2021-08-21 12:03:34,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:34,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:34,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:34,769 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:34,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:34,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250937523] [2021-08-21 12:03:34,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250937523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:34,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155084952] [2021-08-21 12:03:34,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:03:34,770 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:34,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:34,771 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:34,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2021-08-21 12:03:35,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:03:35,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:35,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:03:35,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:36,041 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 37 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:36,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155084952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:36,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:36,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:03:36,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933484318] [2021-08-21 12:03:36,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:03:36,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:36,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:03:36,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:03:36,042 INFO L87 Difference]: Start difference. First operand 3828 states and 11417 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:36,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:36,191 INFO L93 Difference]: Finished difference Result 3867 states and 11472 transitions. [2021-08-21 12:03:36,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:03:36,191 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:03:36,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:36,198 INFO L225 Difference]: With dead ends: 3867 [2021-08-21 12:03:36,198 INFO L226 Difference]: Without dead ends: 3866 [2021-08-21 12:03:36,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:03:36,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3866 states. [2021-08-21 12:03:36,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3866 to 3828. [2021-08-21 12:03:36,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3827 states have (on average 2.982754115495166) internal successors, (11415), 3827 states have internal predecessors, (11415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:36,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 11415 transitions. [2021-08-21 12:03:36,256 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 11415 transitions. Word has length 22 [2021-08-21 12:03:36,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:36,256 INFO L470 AbstractCegarLoop]: Abstraction has 3828 states and 11415 transitions. [2021-08-21 12:03:36,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:36,256 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 11415 transitions. [2021-08-21 12:03:36,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:03:36,261 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:36,261 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:36,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:36,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:36,474 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:36,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:36,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1712924187, now seen corresponding path program 201 times [2021-08-21 12:03:36,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:36,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939426036] [2021-08-21 12:03:36,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:36,475 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:36,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:36,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:36,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939426036] [2021-08-21 12:03:36,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939426036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:36,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050021027] [2021-08-21 12:03:36,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:03:36,549 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:36,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:36,550 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:36,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2021-08-21 12:03:37,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:03:37,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:37,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:03:37,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:37,909 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:37,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050021027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:37,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:37,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:03:37,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003289480] [2021-08-21 12:03:37,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:03:37,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:37,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:03:37,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:03:37,910 INFO L87 Difference]: Start difference. First operand 3828 states and 11415 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:37,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:37,986 INFO L93 Difference]: Finished difference Result 4285 states and 12230 transitions. [2021-08-21 12:03:37,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:03:37,986 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:03:37,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:37,993 INFO L225 Difference]: With dead ends: 4285 [2021-08-21 12:03:37,993 INFO L226 Difference]: Without dead ends: 4285 [2021-08-21 12:03:37,994 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:03:37,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4285 states. [2021-08-21 12:03:38,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4285 to 3805. [2021-08-21 12:03:38,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3805 states, 3804 states have (on average 2.9779179810725553) internal successors, (11328), 3804 states have internal predecessors, (11328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:38,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3805 states to 3805 states and 11328 transitions. [2021-08-21 12:03:38,056 INFO L78 Accepts]: Start accepts. Automaton has 3805 states and 11328 transitions. Word has length 22 [2021-08-21 12:03:38,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:38,056 INFO L470 AbstractCegarLoop]: Abstraction has 3805 states and 11328 transitions. [2021-08-21 12:03:38,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:38,056 INFO L276 IsEmpty]: Start isEmpty. Operand 3805 states and 11328 transitions. [2021-08-21 12:03:38,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:03:38,061 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:38,061 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:38,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:38,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:38,277 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:38,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:38,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1963865601, now seen corresponding path program 202 times [2021-08-21 12:03:38,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:38,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59501553] [2021-08-21 12:03:38,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:38,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:38,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:38,348 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:38,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:38,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59501553] [2021-08-21 12:03:38,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59501553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:38,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457726479] [2021-08-21 12:03:38,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:03:38,348 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:38,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:38,349 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:38,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2021-08-21 12:03:39,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:03:39,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:39,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:03:39,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:39,704 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:39,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457726479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:39,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:39,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:03:39,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251757965] [2021-08-21 12:03:39,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:03:39,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:39,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:03:39,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:03:39,705 INFO L87 Difference]: Start difference. First operand 3805 states and 11328 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:39,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:39,851 INFO L93 Difference]: Finished difference Result 4145 states and 11841 transitions. [2021-08-21 12:03:39,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:03:39,851 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:03:39,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:39,858 INFO L225 Difference]: With dead ends: 4145 [2021-08-21 12:03:39,858 INFO L226 Difference]: Without dead ends: 4143 [2021-08-21 12:03:39,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=175, Invalid=287, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:03:39,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2021-08-21 12:03:39,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 3815. [2021-08-21 12:03:39,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3815 states, 3814 states have (on average 2.9792868379653905) internal successors, (11363), 3814 states have internal predecessors, (11363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:39,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3815 states to 3815 states and 11363 transitions. [2021-08-21 12:03:39,926 INFO L78 Accepts]: Start accepts. Automaton has 3815 states and 11363 transitions. Word has length 22 [2021-08-21 12:03:39,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:39,927 INFO L470 AbstractCegarLoop]: Abstraction has 3815 states and 11363 transitions. [2021-08-21 12:03:39,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:39,927 INFO L276 IsEmpty]: Start isEmpty. Operand 3815 states and 11363 transitions. [2021-08-21 12:03:39,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:03:39,932 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:39,932 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:39,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:40,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-08-21 12:03:40,149 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:40,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:40,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1529485467, now seen corresponding path program 203 times [2021-08-21 12:03:40,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:40,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684947170] [2021-08-21 12:03:40,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:40,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:40,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:40,221 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:40,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:40,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684947170] [2021-08-21 12:03:40,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684947170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:40,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252775961] [2021-08-21 12:03:40,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:03:40,222 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:40,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:40,223 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:40,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2021-08-21 12:03:41,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:03:41,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:41,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:03:41,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:41,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252775961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:41,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:41,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:03:41,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904409979] [2021-08-21 12:03:41,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:03:41,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:41,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:03:41,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:03:41,473 INFO L87 Difference]: Start difference. First operand 3815 states and 11363 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:41,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:41,582 INFO L93 Difference]: Finished difference Result 4169 states and 12013 transitions. [2021-08-21 12:03:41,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:03:41,582 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:03:41,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:41,587 INFO L225 Difference]: With dead ends: 4169 [2021-08-21 12:03:41,587 INFO L226 Difference]: Without dead ends: 4169 [2021-08-21 12:03:41,587 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:03:41,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4169 states. [2021-08-21 12:03:41,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4169 to 3856. [2021-08-21 12:03:41,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3856 states, 3855 states have (on average 2.9810635538262) internal successors, (11492), 3855 states have internal predecessors, (11492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:41,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3856 states to 3856 states and 11492 transitions. [2021-08-21 12:03:41,632 INFO L78 Accepts]: Start accepts. Automaton has 3856 states and 11492 transitions. Word has length 22 [2021-08-21 12:03:41,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:41,632 INFO L470 AbstractCegarLoop]: Abstraction has 3856 states and 11492 transitions. [2021-08-21 12:03:41,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:41,632 INFO L276 IsEmpty]: Start isEmpty. Operand 3856 states and 11492 transitions. [2021-08-21 12:03:41,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:03:41,636 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:41,636 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:41,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:41,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-08-21 12:03:41,855 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:41,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:41,856 INFO L82 PathProgramCache]: Analyzing trace with hash -615199677, now seen corresponding path program 204 times [2021-08-21 12:03:41,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:41,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387103790] [2021-08-21 12:03:41,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:41,856 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:41,935 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:41,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:41,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387103790] [2021-08-21 12:03:41,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387103790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:41,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557788523] [2021-08-21 12:03:41,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:03:41,936 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:41,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:41,936 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:41,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2021-08-21 12:03:43,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:03:43,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:43,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:03:43,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:43,223 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:43,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557788523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:43,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:43,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:03:43,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596301114] [2021-08-21 12:03:43,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:03:43,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:43,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:03:43,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:03:43,224 INFO L87 Difference]: Start difference. First operand 3856 states and 11492 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:43,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:43,401 INFO L93 Difference]: Finished difference Result 4053 states and 11788 transitions. [2021-08-21 12:03:43,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:03:43,401 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:03:43,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:43,408 INFO L225 Difference]: With dead ends: 4053 [2021-08-21 12:03:43,408 INFO L226 Difference]: Without dead ends: 4051 [2021-08-21 12:03:43,408 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:03:43,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-08-21 12:03:43,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 3856. [2021-08-21 12:03:43,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3856 states, 3855 states have (on average 2.9800259403372245) internal successors, (11488), 3855 states have internal predecessors, (11488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:43,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3856 states to 3856 states and 11488 transitions. [2021-08-21 12:03:43,471 INFO L78 Accepts]: Start accepts. Automaton has 3856 states and 11488 transitions. Word has length 22 [2021-08-21 12:03:43,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:43,472 INFO L470 AbstractCegarLoop]: Abstraction has 3856 states and 11488 transitions. [2021-08-21 12:03:43,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:43,472 INFO L276 IsEmpty]: Start isEmpty. Operand 3856 states and 11488 transitions. [2021-08-21 12:03:43,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:03:43,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:43,477 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:43,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:43,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:43,691 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:43,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:43,691 INFO L82 PathProgramCache]: Analyzing trace with hash 245521895, now seen corresponding path program 205 times [2021-08-21 12:03:43,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:43,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488212591] [2021-08-21 12:03:43,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:43,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:43,762 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:43,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:43,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488212591] [2021-08-21 12:03:43,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488212591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:43,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166621887] [2021-08-21 12:03:43,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:03:43,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:43,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:43,763 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:43,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2021-08-21 12:03:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:45,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:03:45,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:45,135 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:45,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166621887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:45,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:45,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:03:45,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470016677] [2021-08-21 12:03:45,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:03:45,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:45,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:03:45,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:03:45,136 INFO L87 Difference]: Start difference. First operand 3856 states and 11488 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:45,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:45,204 INFO L93 Difference]: Finished difference Result 4303 states and 12220 transitions. [2021-08-21 12:03:45,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:03:45,204 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:03:45,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:45,211 INFO L225 Difference]: With dead ends: 4303 [2021-08-21 12:03:45,212 INFO L226 Difference]: Without dead ends: 4303 [2021-08-21 12:03:45,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:03:45,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4303 states. [2021-08-21 12:03:45,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4303 to 3860. [2021-08-21 12:03:45,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3860 states, 3859 states have (on average 2.9795283752267427) internal successors, (11498), 3859 states have internal predecessors, (11498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:45,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3860 states to 3860 states and 11498 transitions. [2021-08-21 12:03:45,276 INFO L78 Accepts]: Start accepts. Automaton has 3860 states and 11498 transitions. Word has length 22 [2021-08-21 12:03:45,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:45,276 INFO L470 AbstractCegarLoop]: Abstraction has 3860 states and 11498 transitions. [2021-08-21 12:03:45,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:45,276 INFO L276 IsEmpty]: Start isEmpty. Operand 3860 states and 11498 transitions. [2021-08-21 12:03:45,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:03:45,281 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:45,282 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:45,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:45,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-08-21 12:03:45,499 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:45,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:45,499 INFO L82 PathProgramCache]: Analyzing trace with hash 240106977, now seen corresponding path program 206 times [2021-08-21 12:03:45,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:45,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467863014] [2021-08-21 12:03:45,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:45,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:45,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:45,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:45,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467863014] [2021-08-21 12:03:45,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467863014] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:45,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24159571] [2021-08-21 12:03:45,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:03:45,581 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:45,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:45,583 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:45,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2021-08-21 12:03:46,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:03:46,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:46,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:03:46,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:46,938 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:46,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24159571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:46,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:46,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 12:03:46,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469976326] [2021-08-21 12:03:46,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:03:46,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:46,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:03:46,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:03:46,939 INFO L87 Difference]: Start difference. First operand 3860 states and 11498 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:47,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:47,145 INFO L93 Difference]: Finished difference Result 4035 states and 11767 transitions. [2021-08-21 12:03:47,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:03:47,145 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:03:47,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:47,151 INFO L225 Difference]: With dead ends: 4035 [2021-08-21 12:03:47,151 INFO L226 Difference]: Without dead ends: 4033 [2021-08-21 12:03:47,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 125.0ms TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:03:47,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4033 states. [2021-08-21 12:03:47,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4033 to 3860. [2021-08-21 12:03:47,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3860 states, 3859 states have (on average 2.9790101062451413) internal successors, (11496), 3859 states have internal predecessors, (11496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:47,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3860 states to 3860 states and 11496 transitions. [2021-08-21 12:03:47,235 INFO L78 Accepts]: Start accepts. Automaton has 3860 states and 11496 transitions. Word has length 22 [2021-08-21 12:03:47,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:47,235 INFO L470 AbstractCegarLoop]: Abstraction has 3860 states and 11496 transitions. [2021-08-21 12:03:47,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:47,235 INFO L276 IsEmpty]: Start isEmpty. Operand 3860 states and 11496 transitions. [2021-08-21 12:03:47,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:03:47,239 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:47,239 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:47,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:47,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:47,453 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:47,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:47,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1956135203, now seen corresponding path program 207 times [2021-08-21 12:03:47,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:47,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298344506] [2021-08-21 12:03:47,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:47,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:47,537 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:47,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:47,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298344506] [2021-08-21 12:03:47,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298344506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:47,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181898470] [2021-08-21 12:03:47,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:03:47,538 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:47,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:47,539 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:47,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2021-08-21 12:03:48,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:03:48,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:48,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:03:48,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:48,869 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:48,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181898470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:48,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:48,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 12:03:48,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290051366] [2021-08-21 12:03:48,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:03:48,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:48,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:03:48,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:03:48,870 INFO L87 Difference]: Start difference. First operand 3860 states and 11496 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:48,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:48,948 INFO L93 Difference]: Finished difference Result 4586 states and 12943 transitions. [2021-08-21 12:03:48,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:03:48,948 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:03:48,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:48,953 INFO L225 Difference]: With dead ends: 4586 [2021-08-21 12:03:48,953 INFO L226 Difference]: Without dead ends: 4586 [2021-08-21 12:03:48,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:03:48,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4586 states. [2021-08-21 12:03:48,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4586 to 3835. [2021-08-21 12:03:48,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 2.9741784037558685) internal successors, (11403), 3834 states have internal predecessors, (11403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:49,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 11403 transitions. [2021-08-21 12:03:49,001 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 11403 transitions. Word has length 22 [2021-08-21 12:03:49,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:49,001 INFO L470 AbstractCegarLoop]: Abstraction has 3835 states and 11403 transitions. [2021-08-21 12:03:49,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:49,001 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 11403 transitions. [2021-08-21 12:03:49,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:03:49,005 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:49,005 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:49,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:49,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-08-21 12:03:49,225 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:49,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:49,225 INFO L82 PathProgramCache]: Analyzing trace with hash -575932491, now seen corresponding path program 208 times [2021-08-21 12:03:49,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:49,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581454413] [2021-08-21 12:03:49,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:49,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:49,331 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:49,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:49,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581454413] [2021-08-21 12:03:49,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581454413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:49,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309280556] [2021-08-21 12:03:49,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:03:49,332 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:49,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:49,332 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:49,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2021-08-21 12:03:50,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:03:50,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:50,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:03:50,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:50,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309280556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:50,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:50,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:03:50,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218018415] [2021-08-21 12:03:50,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:03:50,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:50,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:03:50,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:03:50,686 INFO L87 Difference]: Start difference. First operand 3835 states and 11403 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:50,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:50,815 INFO L93 Difference]: Finished difference Result 4181 states and 11925 transitions. [2021-08-21 12:03:50,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:03:50,815 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:03:50,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:50,820 INFO L225 Difference]: With dead ends: 4181 [2021-08-21 12:03:50,820 INFO L226 Difference]: Without dead ends: 4179 [2021-08-21 12:03:50,820 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:03:50,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4179 states. [2021-08-21 12:03:50,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4179 to 3847. [2021-08-21 12:03:50,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3847 states, 3846 states have (on average 2.9752990119604785) internal successors, (11443), 3846 states have internal predecessors, (11443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:50,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3847 states to 3847 states and 11443 transitions. [2021-08-21 12:03:50,866 INFO L78 Accepts]: Start accepts. Automaton has 3847 states and 11443 transitions. Word has length 22 [2021-08-21 12:03:50,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:50,866 INFO L470 AbstractCegarLoop]: Abstraction has 3847 states and 11443 transitions. [2021-08-21 12:03:50,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:50,866 INFO L276 IsEmpty]: Start isEmpty. Operand 3847 states and 11443 transitions. [2021-08-21 12:03:50,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:03:50,870 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:50,870 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:50,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:51,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-08-21 12:03:51,086 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:51,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:51,086 INFO L82 PathProgramCache]: Analyzing trace with hash 225683737, now seen corresponding path program 209 times [2021-08-21 12:03:51,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:51,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387092836] [2021-08-21 12:03:51,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:51,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:51,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:51,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:51,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387092836] [2021-08-21 12:03:51,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387092836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:51,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660705971] [2021-08-21 12:03:51,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:03:51,166 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:51,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:51,166 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:51,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2021-08-21 12:03:52,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:03:52,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:52,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:03:52,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:52,584 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:52,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660705971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:52,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:52,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:03:52,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105415849] [2021-08-21 12:03:52,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:03:52,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:52,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:03:52,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:03:52,585 INFO L87 Difference]: Start difference. First operand 3847 states and 11443 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:52,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:52,696 INFO L93 Difference]: Finished difference Result 4237 states and 12150 transitions. [2021-08-21 12:03:52,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:03:52,696 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:03:52,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:52,703 INFO L225 Difference]: With dead ends: 4237 [2021-08-21 12:03:52,703 INFO L226 Difference]: Without dead ends: 4237 [2021-08-21 12:03:52,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:03:52,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4237 states. [2021-08-21 12:03:52,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4237 to 3868. [2021-08-21 12:03:52,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3868 states, 3867 states have (on average 2.9769847426945955) internal successors, (11512), 3867 states have internal predecessors, (11512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:52,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3868 states to 3868 states and 11512 transitions. [2021-08-21 12:03:52,765 INFO L78 Accepts]: Start accepts. Automaton has 3868 states and 11512 transitions. Word has length 22 [2021-08-21 12:03:52,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:52,765 INFO L470 AbstractCegarLoop]: Abstraction has 3868 states and 11512 transitions. [2021-08-21 12:03:52,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:52,765 INFO L276 IsEmpty]: Start isEmpty. Operand 3868 states and 11512 transitions. [2021-08-21 12:03:52,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:03:52,770 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:52,770 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:52,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2021-08-21 12:03:52,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-08-21 12:03:52,991 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:52,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:52,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1139969527, now seen corresponding path program 210 times [2021-08-21 12:03:52,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:52,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494291843] [2021-08-21 12:03:52,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:52,991 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:53,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:53,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494291843] [2021-08-21 12:03:53,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494291843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:53,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200196917] [2021-08-21 12:03:53,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:03:53,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:53,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:53,062 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:53,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2021-08-21 12:03:54,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:03:54,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:54,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:03:54,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:54,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200196917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:54,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:54,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:03:54,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777472153] [2021-08-21 12:03:54,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:03:54,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:54,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:03:54,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:03:54,502 INFO L87 Difference]: Start difference. First operand 3868 states and 11512 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:54,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:54,652 INFO L93 Difference]: Finished difference Result 4089 states and 11844 transitions. [2021-08-21 12:03:54,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:03:54,653 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:03:54,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:54,659 INFO L225 Difference]: With dead ends: 4089 [2021-08-21 12:03:54,659 INFO L226 Difference]: Without dead ends: 4087 [2021-08-21 12:03:54,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:03:54,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4087 states. [2021-08-21 12:03:54,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4087 to 3837. [2021-08-21 12:03:54,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3837 states, 3836 states have (on average 2.974191866527633) internal successors, (11409), 3836 states have internal predecessors, (11409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:54,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3837 states to 3837 states and 11409 transitions. [2021-08-21 12:03:54,722 INFO L78 Accepts]: Start accepts. Automaton has 3837 states and 11409 transitions. Word has length 22 [2021-08-21 12:03:54,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:54,722 INFO L470 AbstractCegarLoop]: Abstraction has 3837 states and 11409 transitions. [2021-08-21 12:03:54,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:54,722 INFO L276 IsEmpty]: Start isEmpty. Operand 3837 states and 11409 transitions. [2021-08-21 12:03:54,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:03:54,727 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:54,727 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:54,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2021-08-21 12:03:54,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-08-21 12:03:54,929 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:54,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:54,929 INFO L82 PathProgramCache]: Analyzing trace with hash 2000691099, now seen corresponding path program 211 times [2021-08-21 12:03:54,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:54,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157475197] [2021-08-21 12:03:54,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:54,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:54,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:55,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:55,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157475197] [2021-08-21 12:03:55,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157475197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:55,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046449534] [2021-08-21 12:03:55,000 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:03:55,000 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:55,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:55,001 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:55,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2021-08-21 12:03:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:56,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:03:56,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:56,336 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:56,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046449534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:56,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:56,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:03:56,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353750518] [2021-08-21 12:03:56,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:03:56,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:56,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:03:56,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:03:56,337 INFO L87 Difference]: Start difference. First operand 3837 states and 11409 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:56,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:56,392 INFO L93 Difference]: Finished difference Result 4171 states and 11863 transitions. [2021-08-21 12:03:56,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:03:56,393 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:03:56,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:56,397 INFO L225 Difference]: With dead ends: 4171 [2021-08-21 12:03:56,397 INFO L226 Difference]: Without dead ends: 4171 [2021-08-21 12:03:56,398 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:03:56,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4171 states. [2021-08-21 12:03:56,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4171 to 3827. [2021-08-21 12:03:56,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3827 states, 3826 states have (on average 2.970726607422896) internal successors, (11366), 3826 states have internal predecessors, (11366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:56,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3827 states to 3827 states and 11366 transitions. [2021-08-21 12:03:56,444 INFO L78 Accepts]: Start accepts. Automaton has 3827 states and 11366 transitions. Word has length 22 [2021-08-21 12:03:56,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:56,444 INFO L470 AbstractCegarLoop]: Abstraction has 3827 states and 11366 transitions. [2021-08-21 12:03:56,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:56,444 INFO L276 IsEmpty]: Start isEmpty. Operand 3827 states and 11366 transitions. [2021-08-21 12:03:56,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:03:56,448 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:56,448 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:56,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2021-08-21 12:03:56,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:56,665 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:56,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:56,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1995276181, now seen corresponding path program 212 times [2021-08-21 12:03:56,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:56,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536268969] [2021-08-21 12:03:56,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:56,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:56,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:56,744 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:56,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:56,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536268969] [2021-08-21 12:03:56,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536268969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:56,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845420929] [2021-08-21 12:03:56,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:03:56,744 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:56,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:56,745 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:56,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2021-08-21 12:03:58,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:03:58,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:58,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:03:58,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:58,159 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:58,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845420929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:58,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:58,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 12:03:58,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50278234] [2021-08-21 12:03:58,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:03:58,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:58,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:03:58,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:03:58,160 INFO L87 Difference]: Start difference. First operand 3827 states and 11366 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:58,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:58,336 INFO L93 Difference]: Finished difference Result 4045 states and 11697 transitions. [2021-08-21 12:03:58,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:03:58,336 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:03:58,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:58,343 INFO L225 Difference]: With dead ends: 4045 [2021-08-21 12:03:58,343 INFO L226 Difference]: Without dead ends: 4043 [2021-08-21 12:03:58,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=195, Invalid=357, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:03:58,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4043 states. [2021-08-21 12:03:58,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4043 to 3827. [2021-08-21 12:03:58,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3827 states, 3826 states have (on average 2.9702038682697336) internal successors, (11364), 3826 states have internal predecessors, (11364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:58,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3827 states to 3827 states and 11364 transitions. [2021-08-21 12:03:58,405 INFO L78 Accepts]: Start accepts. Automaton has 3827 states and 11364 transitions. Word has length 22 [2021-08-21 12:03:58,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:58,405 INFO L470 AbstractCegarLoop]: Abstraction has 3827 states and 11364 transitions. [2021-08-21 12:03:58,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:58,405 INFO L276 IsEmpty]: Start isEmpty. Operand 3827 states and 11364 transitions. [2021-08-21 12:03:58,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:03:58,410 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:58,410 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:58,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2021-08-21 12:03:58,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-08-21 12:03:58,630 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:58,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:58,631 INFO L82 PathProgramCache]: Analyzing trace with hash -583662889, now seen corresponding path program 213 times [2021-08-21 12:03:58,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:58,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608240117] [2021-08-21 12:03:58,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:58,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:58,703 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:58,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:58,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608240117] [2021-08-21 12:03:58,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608240117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:58,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724123589] [2021-08-21 12:03:58,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:03:58,704 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:58,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:58,705 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:58,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2021-08-21 12:04:00,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:04:00,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:00,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:00,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:00,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724123589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:00,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:00,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 12:04:00,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114594540] [2021-08-21 12:04:00,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:04:00,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:00,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:04:00,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:04:00,170 INFO L87 Difference]: Start difference. First operand 3827 states and 11364 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:00,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:00,256 INFO L93 Difference]: Finished difference Result 4423 states and 12469 transitions. [2021-08-21 12:04:00,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:04:00,256 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:00,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:00,264 INFO L225 Difference]: With dead ends: 4423 [2021-08-21 12:04:00,264 INFO L226 Difference]: Without dead ends: 4423 [2021-08-21 12:04:00,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:04:00,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4423 states. [2021-08-21 12:04:00,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4423 to 3837. [2021-08-21 12:04:00,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3837 states, 3836 states have (on average 2.9697601668404587) internal successors, (11392), 3836 states have internal predecessors, (11392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:00,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3837 states to 3837 states and 11392 transitions. [2021-08-21 12:04:00,322 INFO L78 Accepts]: Start accepts. Automaton has 3837 states and 11392 transitions. Word has length 22 [2021-08-21 12:04:00,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:00,322 INFO L470 AbstractCegarLoop]: Abstraction has 3837 states and 11392 transitions. [2021-08-21 12:04:00,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:00,322 INFO L276 IsEmpty]: Start isEmpty. Operand 3837 states and 11392 transitions. [2021-08-21 12:04:00,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:00,327 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:00,327 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:00,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:00,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:00,528 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:00,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:00,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1554988617, now seen corresponding path program 214 times [2021-08-21 12:04:00,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:00,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652918495] [2021-08-21 12:04:00,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:00,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:00,610 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:00,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:00,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652918495] [2021-08-21 12:04:00,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652918495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:00,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395552813] [2021-08-21 12:04:00,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:04:00,611 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:00,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:00,611 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:00,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2021-08-21 12:04:02,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:04:02,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:02,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:02,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:02,095 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:02,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395552813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:02,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:02,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 12:04:02,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205143100] [2021-08-21 12:04:02,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:04:02,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:02,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:04:02,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:04:02,096 INFO L87 Difference]: Start difference. First operand 3837 states and 11392 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:02,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:02,244 INFO L93 Difference]: Finished difference Result 4108 states and 11999 transitions. [2021-08-21 12:04:02,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:04:02,245 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:02,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:02,251 INFO L225 Difference]: With dead ends: 4108 [2021-08-21 12:04:02,251 INFO L226 Difference]: Without dead ends: 4105 [2021-08-21 12:04:02,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:04:02,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4105 states. [2021-08-21 12:04:02,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4105 to 3840. [2021-08-21 12:04:02,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3840 states, 3839 states have (on average 2.969262828861683) internal successors, (11399), 3839 states have internal predecessors, (11399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:02,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3840 states to 3840 states and 11399 transitions. [2021-08-21 12:04:02,309 INFO L78 Accepts]: Start accepts. Automaton has 3840 states and 11399 transitions. Word has length 22 [2021-08-21 12:04:02,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:02,309 INFO L470 AbstractCegarLoop]: Abstraction has 3840 states and 11399 transitions. [2021-08-21 12:04:02,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:02,309 INFO L276 IsEmpty]: Start isEmpty. Operand 3840 states and 11399 transitions. [2021-08-21 12:04:02,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:02,314 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:02,314 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:02,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2021-08-21 12:04:02,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:02,534 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:02,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:02,535 INFO L82 PathProgramCache]: Analyzing trace with hash 905742107, now seen corresponding path program 215 times [2021-08-21 12:04:02,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:02,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838487472] [2021-08-21 12:04:02,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:02,535 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:02,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:02,612 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:02,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:02,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838487472] [2021-08-21 12:04:02,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838487472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:02,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333925821] [2021-08-21 12:04:02,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:04:02,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:02,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:02,613 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:02,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2021-08-21 12:04:04,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:04:04,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:04,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:04,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:04,117 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:04,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333925821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:04,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:04,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 12:04:04,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671883018] [2021-08-21 12:04:04,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:04:04,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:04,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:04:04,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:04:04,118 INFO L87 Difference]: Start difference. First operand 3840 states and 11399 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:04,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:04,236 INFO L93 Difference]: Finished difference Result 5860 states and 16951 transitions. [2021-08-21 12:04:04,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:04:04,236 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:04,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:04,256 INFO L225 Difference]: With dead ends: 5860 [2021-08-21 12:04:04,256 INFO L226 Difference]: Without dead ends: 5860 [2021-08-21 12:04:04,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:04:04,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5860 states. [2021-08-21 12:04:04,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5860 to 5029. [2021-08-21 12:04:04,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5029 states, 5028 states have (on average 3.030230708035004) internal successors, (15236), 5028 states have internal predecessors, (15236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:04,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5029 states to 5029 states and 15236 transitions. [2021-08-21 12:04:04,344 INFO L78 Accepts]: Start accepts. Automaton has 5029 states and 15236 transitions. Word has length 22 [2021-08-21 12:04:04,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:04,344 INFO L470 AbstractCegarLoop]: Abstraction has 5029 states and 15236 transitions. [2021-08-21 12:04:04,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:04,344 INFO L276 IsEmpty]: Start isEmpty. Operand 5029 states and 15236 transitions. [2021-08-21 12:04:04,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:04,350 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:04,350 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:04,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:04,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-08-21 12:04:04,571 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:04,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:04,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1781625885, now seen corresponding path program 216 times [2021-08-21 12:04:04,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:04,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285201227] [2021-08-21 12:04:04,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:04,572 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:04,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:04,637 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:04:04,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:04,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285201227] [2021-08-21 12:04:04,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285201227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:04,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666326360] [2021-08-21 12:04:04,638 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:04:04,638 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:04,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:04,639 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:04,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2021-08-21 12:04:06,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:04:06,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:06,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:06,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:06,107 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:04:06,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666326360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:06,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:06,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 12:04:06,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534603604] [2021-08-21 12:04:06,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:04:06,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:06,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:04:06,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:04:06,108 INFO L87 Difference]: Start difference. First operand 5029 states and 15236 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:06,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:06,278 INFO L93 Difference]: Finished difference Result 5378 states and 15831 transitions. [2021-08-21 12:04:06,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:04:06,279 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:06,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:06,287 INFO L225 Difference]: With dead ends: 5378 [2021-08-21 12:04:06,287 INFO L226 Difference]: Without dead ends: 5374 [2021-08-21 12:04:06,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:04:06,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5374 states. [2021-08-21 12:04:06,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5374 to 5082. [2021-08-21 12:04:06,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5082 states, 5081 states have (on average 3.034638850619957) internal successors, (15419), 5081 states have internal predecessors, (15419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:06,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5082 states to 5082 states and 15419 transitions. [2021-08-21 12:04:06,369 INFO L78 Accepts]: Start accepts. Automaton has 5082 states and 15419 transitions. Word has length 22 [2021-08-21 12:04:06,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:06,369 INFO L470 AbstractCegarLoop]: Abstraction has 5082 states and 15419 transitions. [2021-08-21 12:04:06,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:06,369 INFO L276 IsEmpty]: Start isEmpty. Operand 5082 states and 15419 transitions. [2021-08-21 12:04:06,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:06,376 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:06,376 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:06,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Ended with exit code 0 [2021-08-21 12:04:06,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:06,596 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:06,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:06,596 INFO L82 PathProgramCache]: Analyzing trace with hash 221557567, now seen corresponding path program 217 times [2021-08-21 12:04:06,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:06,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443501029] [2021-08-21 12:04:06,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:06,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:06,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:06,669 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:06,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:06,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443501029] [2021-08-21 12:04:06,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443501029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:06,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696118215] [2021-08-21 12:04:06,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:04:06,670 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:06,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:06,670 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:06,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2021-08-21 12:04:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:08,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:08,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:08,165 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:08,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696118215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:08,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:08,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 12:04:08,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352496753] [2021-08-21 12:04:08,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:04:08,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:08,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:04:08,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:04:08,166 INFO L87 Difference]: Start difference. First operand 5082 states and 15419 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:08,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:08,357 INFO L93 Difference]: Finished difference Result 5284 states and 15759 transitions. [2021-08-21 12:04:08,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:04:08,357 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:08,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:08,366 INFO L225 Difference]: With dead ends: 5284 [2021-08-21 12:04:08,366 INFO L226 Difference]: Without dead ends: 5278 [2021-08-21 12:04:08,366 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:04:08,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5278 states. [2021-08-21 12:04:08,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5278 to 5073. [2021-08-21 12:04:08,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5073 states, 5072 states have (on average 3.0352917981072554) internal successors, (15395), 5072 states have internal predecessors, (15395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:08,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5073 states to 5073 states and 15395 transitions. [2021-08-21 12:04:08,450 INFO L78 Accepts]: Start accepts. Automaton has 5073 states and 15395 transitions. Word has length 22 [2021-08-21 12:04:08,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:08,450 INFO L470 AbstractCegarLoop]: Abstraction has 5073 states and 15395 transitions. [2021-08-21 12:04:08,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:08,450 INFO L276 IsEmpty]: Start isEmpty. Operand 5073 states and 15395 transitions. [2021-08-21 12:04:08,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:08,457 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:08,457 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:08,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:08,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:08,677 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:08,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:08,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1612679005, now seen corresponding path program 218 times [2021-08-21 12:04:08,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:08,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261587652] [2021-08-21 12:04:08,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:08,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:08,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:08,753 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:08,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:08,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261587652] [2021-08-21 12:04:08,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261587652] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:08,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937412164] [2021-08-21 12:04:08,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:04:08,754 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:08,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:08,755 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:08,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2021-08-21 12:04:10,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:04:10,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:10,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:10,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:10,234 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:10,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937412164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:10,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:10,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 12:04:10,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556531231] [2021-08-21 12:04:10,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:04:10,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:10,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:04:10,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:04:10,235 INFO L87 Difference]: Start difference. First operand 5073 states and 15395 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:10,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:10,347 INFO L93 Difference]: Finished difference Result 6134 states and 17834 transitions. [2021-08-21 12:04:10,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:04:10,348 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:10,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:10,356 INFO L225 Difference]: With dead ends: 6134 [2021-08-21 12:04:10,356 INFO L226 Difference]: Without dead ends: 6134 [2021-08-21 12:04:10,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:04:10,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6134 states. [2021-08-21 12:04:10,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6134 to 3900. [2021-08-21 12:04:10,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3900 states, 3899 states have (on average 2.9864067709669144) internal successors, (11644), 3899 states have internal predecessors, (11644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:10,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3900 states to 3900 states and 11644 transitions. [2021-08-21 12:04:10,439 INFO L78 Accepts]: Start accepts. Automaton has 3900 states and 11644 transitions. Word has length 22 [2021-08-21 12:04:10,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:10,439 INFO L470 AbstractCegarLoop]: Abstraction has 3900 states and 11644 transitions. [2021-08-21 12:04:10,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:10,439 INFO L276 IsEmpty]: Start isEmpty. Operand 3900 states and 11644 transitions. [2021-08-21 12:04:10,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:10,443 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:10,443 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:10,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:10,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-08-21 12:04:10,657 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:10,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:10,657 INFO L82 PathProgramCache]: Analyzing trace with hash -2000262015, now seen corresponding path program 219 times [2021-08-21 12:04:10,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:10,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548899686] [2021-08-21 12:04:10,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:10,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:10,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:10,723 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:10,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:10,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548899686] [2021-08-21 12:04:10,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548899686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:10,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323808696] [2021-08-21 12:04:10,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:04:10,723 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:10,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:10,724 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:10,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2021-08-21 12:04:12,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:04:12,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:12,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:12,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:12,223 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:12,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323808696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:12,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:12,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:04:12,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409395822] [2021-08-21 12:04:12,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:04:12,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:12,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:04:12,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:04:12,224 INFO L87 Difference]: Start difference. First operand 3900 states and 11644 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:12,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:12,371 INFO L93 Difference]: Finished difference Result 4227 states and 12122 transitions. [2021-08-21 12:04:12,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:04:12,371 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:12,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:12,378 INFO L225 Difference]: With dead ends: 4227 [2021-08-21 12:04:12,378 INFO L226 Difference]: Without dead ends: 4223 [2021-08-21 12:04:12,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 92.7ms TimeCoverageRelationStatistics Valid=173, Invalid=289, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:04:12,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4223 states. [2021-08-21 12:04:12,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4223 to 3890. [2021-08-21 12:04:12,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3890 states, 3889 states have (on average 2.983543327333505) internal successors, (11603), 3889 states have internal predecessors, (11603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:12,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3890 states to 3890 states and 11603 transitions. [2021-08-21 12:04:12,477 INFO L78 Accepts]: Start accepts. Automaton has 3890 states and 11603 transitions. Word has length 22 [2021-08-21 12:04:12,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:12,477 INFO L470 AbstractCegarLoop]: Abstraction has 3890 states and 11603 transitions. [2021-08-21 12:04:12,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:12,477 INFO L276 IsEmpty]: Start isEmpty. Operand 3890 states and 11603 transitions. [2021-08-21 12:04:12,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:12,482 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:12,482 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:12,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2021-08-21 12:04:12,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-08-21 12:04:12,695 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:12,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:12,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1198645787, now seen corresponding path program 220 times [2021-08-21 12:04:12,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:12,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626899618] [2021-08-21 12:04:12,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:12,695 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:12,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:12,764 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:12,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:12,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626899618] [2021-08-21 12:04:12,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626899618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:12,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332950062] [2021-08-21 12:04:12,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:04:12,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:12,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:12,766 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:12,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2021-08-21 12:04:14,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:04:14,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:14,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:14,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:14,284 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:14,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332950062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:14,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:14,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:04:14,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33118701] [2021-08-21 12:04:14,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:04:14,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:14,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:04:14,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:04:14,285 INFO L87 Difference]: Start difference. First operand 3890 states and 11603 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:14,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:14,384 INFO L93 Difference]: Finished difference Result 4318 states and 12391 transitions. [2021-08-21 12:04:14,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:04:14,384 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:14,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:14,391 INFO L225 Difference]: With dead ends: 4318 [2021-08-21 12:04:14,391 INFO L226 Difference]: Without dead ends: 4318 [2021-08-21 12:04:14,392 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:04:14,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4318 states. [2021-08-21 12:04:14,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4318 to 3929. [2021-08-21 12:04:14,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3929 states, 3928 states have (on average 2.9857433808553973) internal successors, (11728), 3928 states have internal predecessors, (11728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:14,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3929 states to 3929 states and 11728 transitions. [2021-08-21 12:04:14,457 INFO L78 Accepts]: Start accepts. Automaton has 3929 states and 11728 transitions. Word has length 22 [2021-08-21 12:04:14,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:14,457 INFO L470 AbstractCegarLoop]: Abstraction has 3929 states and 11728 transitions. [2021-08-21 12:04:14,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:14,457 INFO L276 IsEmpty]: Start isEmpty. Operand 3929 states and 11728 transitions. [2021-08-21 12:04:14,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:14,462 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:14,462 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:14,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:14,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-08-21 12:04:14,669 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:14,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:14,669 INFO L82 PathProgramCache]: Analyzing trace with hash -284359997, now seen corresponding path program 221 times [2021-08-21 12:04:14,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:14,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811917831] [2021-08-21 12:04:14,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:14,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:14,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:14,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:14,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811917831] [2021-08-21 12:04:14,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811917831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:14,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890895691] [2021-08-21 12:04:14,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:04:14,792 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:14,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:14,817 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:14,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2021-08-21 12:04:16,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 12:04:16,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:16,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:16,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:16,366 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:16,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890895691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:16,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:16,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:04:16,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411121195] [2021-08-21 12:04:16,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:04:16,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:16,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:04:16,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:04:16,367 INFO L87 Difference]: Start difference. First operand 3929 states and 11728 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:16,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:16,517 INFO L93 Difference]: Finished difference Result 4175 states and 12097 transitions. [2021-08-21 12:04:16,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:04:16,517 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:16,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:16,524 INFO L225 Difference]: With dead ends: 4175 [2021-08-21 12:04:16,524 INFO L226 Difference]: Without dead ends: 4172 [2021-08-21 12:04:16,524 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:04:16,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4172 states. [2021-08-21 12:04:16,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4172 to 3907. [2021-08-21 12:04:16,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3907 states, 3906 states have (on average 2.9818228366615465) internal successors, (11647), 3906 states have internal predecessors, (11647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:16,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3907 states to 3907 states and 11647 transitions. [2021-08-21 12:04:16,587 INFO L78 Accepts]: Start accepts. Automaton has 3907 states and 11647 transitions. Word has length 22 [2021-08-21 12:04:16,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:16,587 INFO L470 AbstractCegarLoop]: Abstraction has 3907 states and 11647 transitions. [2021-08-21 12:04:16,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:16,587 INFO L276 IsEmpty]: Start isEmpty. Operand 3907 states and 11647 transitions. [2021-08-21 12:04:16,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:16,592 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:16,592 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:16,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:16,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-08-21 12:04:16,793 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:16,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:16,794 INFO L82 PathProgramCache]: Analyzing trace with hash 576361575, now seen corresponding path program 222 times [2021-08-21 12:04:16,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:16,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028948567] [2021-08-21 12:04:16,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:16,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:16,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:16,874 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:16,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:16,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028948567] [2021-08-21 12:04:16,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028948567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:16,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816339106] [2021-08-21 12:04:16,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:04:16,875 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:16,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:16,876 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:16,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2021-08-21 12:04:18,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:04:18,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:18,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:18,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:18,455 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:18,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816339106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:18,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:18,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:04:18,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388855515] [2021-08-21 12:04:18,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:04:18,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:18,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:04:18,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:04:18,456 INFO L87 Difference]: Start difference. First operand 3907 states and 11647 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:18,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:18,528 INFO L93 Difference]: Finished difference Result 4386 states and 12491 transitions. [2021-08-21 12:04:18,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:04:18,528 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:18,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:18,535 INFO L225 Difference]: With dead ends: 4386 [2021-08-21 12:04:18,536 INFO L226 Difference]: Without dead ends: 4386 [2021-08-21 12:04:18,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:04:18,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2021-08-21 12:04:18,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 3916. [2021-08-21 12:04:18,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 2.9798212005108557) internal successors, (11666), 3915 states have internal predecessors, (11666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:18,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 11666 transitions. [2021-08-21 12:04:18,601 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 11666 transitions. Word has length 22 [2021-08-21 12:04:18,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:18,601 INFO L470 AbstractCegarLoop]: Abstraction has 3916 states and 11666 transitions. [2021-08-21 12:04:18,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:18,601 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 11666 transitions. [2021-08-21 12:04:18,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:18,606 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:18,606 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:18,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Ended with exit code 0 [2021-08-21 12:04:18,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-08-21 12:04:18,827 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:18,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:18,827 INFO L82 PathProgramCache]: Analyzing trace with hash 570946657, now seen corresponding path program 223 times [2021-08-21 12:04:18,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:18,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731859595] [2021-08-21 12:04:18,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:18,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:18,909 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:18,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:18,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731859595] [2021-08-21 12:04:18,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731859595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:18,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434000549] [2021-08-21 12:04:18,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:04:18,909 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:18,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:18,910 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:18,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2021-08-21 12:04:20,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:20,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:20,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:20,487 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:20,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434000549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:20,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:20,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 12:04:20,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624816549] [2021-08-21 12:04:20,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:04:20,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:20,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:04:20,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:04:20,488 INFO L87 Difference]: Start difference. First operand 3916 states and 11666 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:20,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:20,645 INFO L93 Difference]: Finished difference Result 4158 states and 12034 transitions. [2021-08-21 12:04:20,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:04:20,645 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:20,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:20,652 INFO L225 Difference]: With dead ends: 4158 [2021-08-21 12:04:20,652 INFO L226 Difference]: Without dead ends: 4155 [2021-08-21 12:04:20,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:04:20,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2021-08-21 12:04:20,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 3907. [2021-08-21 12:04:20,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3907 states, 3906 states have (on average 2.9787506400409627) internal successors, (11635), 3906 states have internal predecessors, (11635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:20,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3907 states to 3907 states and 11635 transitions. [2021-08-21 12:04:20,714 INFO L78 Accepts]: Start accepts. Automaton has 3907 states and 11635 transitions. Word has length 22 [2021-08-21 12:04:20,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:20,714 INFO L470 AbstractCegarLoop]: Abstraction has 3907 states and 11635 transitions. [2021-08-21 12:04:20,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:20,714 INFO L276 IsEmpty]: Start isEmpty. Operand 3907 states and 11635 transitions. [2021-08-21 12:04:20,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:20,719 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:20,719 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:20,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:20,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:20,940 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:20,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:20,940 INFO L82 PathProgramCache]: Analyzing trace with hash -2007992413, now seen corresponding path program 224 times [2021-08-21 12:04:20,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:20,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492933265] [2021-08-21 12:04:20,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:20,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:20,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:21,009 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:21,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:21,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492933265] [2021-08-21 12:04:21,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492933265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:21,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215682347] [2021-08-21 12:04:21,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:04:21,010 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:21,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:21,010 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:21,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2021-08-21 12:04:22,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:04:22,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:22,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:22,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:22,591 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:22,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215682347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:22,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:22,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 12:04:22,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127026526] [2021-08-21 12:04:22,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:04:22,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:22,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:04:22,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:04:22,592 INFO L87 Difference]: Start difference. First operand 3907 states and 11635 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:22,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:22,670 INFO L93 Difference]: Finished difference Result 4211 states and 12024 transitions. [2021-08-21 12:04:22,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:04:22,670 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:22,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:22,677 INFO L225 Difference]: With dead ends: 4211 [2021-08-21 12:04:22,677 INFO L226 Difference]: Without dead ends: 4211 [2021-08-21 12:04:22,678 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:04:22,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4211 states. [2021-08-21 12:04:22,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4211 to 3872. [2021-08-21 12:04:22,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3872 states, 3871 states have (on average 2.9736502195815033) internal successors, (11511), 3871 states have internal predecessors, (11511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:22,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3872 states to 3872 states and 11511 transitions. [2021-08-21 12:04:22,740 INFO L78 Accepts]: Start accepts. Automaton has 3872 states and 11511 transitions. Word has length 22 [2021-08-21 12:04:22,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:22,740 INFO L470 AbstractCegarLoop]: Abstraction has 3872 states and 11511 transitions. [2021-08-21 12:04:22,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:22,740 INFO L276 IsEmpty]: Start isEmpty. Operand 3872 states and 11511 transitions. [2021-08-21 12:04:22,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:22,745 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:22,745 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:22,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:22,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:22,966 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:22,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:22,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1315649155, now seen corresponding path program 225 times [2021-08-21 12:04:22,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:22,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491207410] [2021-08-21 12:04:22,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:22,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:23,045 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:23,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:23,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491207410] [2021-08-21 12:04:23,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491207410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:23,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656140799] [2021-08-21 12:04:23,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:04:23,046 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:23,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:23,047 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:23,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2021-08-21 12:04:24,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:04:24,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:24,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:04:24,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 12:04:24,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656140799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:24,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:24,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2021-08-21 12:04:24,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412300969] [2021-08-21 12:04:24,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:04:24,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:24,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:04:24,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:04:24,704 INFO L87 Difference]: Start difference. First operand 3872 states and 11511 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:26,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:26,111 INFO L93 Difference]: Finished difference Result 9572 states and 27547 transitions. [2021-08-21 12:04:26,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-08-21 12:04:26,111 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:26,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:26,126 INFO L225 Difference]: With dead ends: 9572 [2021-08-21 12:04:26,126 INFO L226 Difference]: Without dead ends: 9549 [2021-08-21 12:04:26,127 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3499 ImplicationChecksByTransitivity, 1007.6ms TimeCoverageRelationStatistics Valid=893, Invalid=9409, Unknown=0, NotChecked=0, Total=10302 [2021-08-21 12:04:26,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9549 states. [2021-08-21 12:04:26,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9549 to 5351. [2021-08-21 12:04:26,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5351 states, 5350 states have (on average 2.9216822429906544) internal successors, (15631), 5350 states have internal predecessors, (15631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:26,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5351 states to 5351 states and 15631 transitions. [2021-08-21 12:04:26,240 INFO L78 Accepts]: Start accepts. Automaton has 5351 states and 15631 transitions. Word has length 22 [2021-08-21 12:04:26,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:26,240 INFO L470 AbstractCegarLoop]: Abstraction has 5351 states and 15631 transitions. [2021-08-21 12:04:26,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:26,240 INFO L276 IsEmpty]: Start isEmpty. Operand 5351 states and 15631 transitions. [2021-08-21 12:04:26,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:26,247 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:26,247 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:26,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Ended with exit code 0 [2021-08-21 12:04:26,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-08-21 12:04:26,467 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:26,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:26,467 INFO L82 PathProgramCache]: Analyzing trace with hash -518587417, now seen corresponding path program 226 times [2021-08-21 12:04:26,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:26,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247792947] [2021-08-21 12:04:26,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:26,468 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:26,543 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:26,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:26,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247792947] [2021-08-21 12:04:26,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247792947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:26,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519350826] [2021-08-21 12:04:26,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:04:26,544 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:26,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:26,545 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:26,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2021-08-21 12:04:28,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:04:28,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:28,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:28,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:28,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519350826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:28,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:28,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 12:04:28,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139235065] [2021-08-21 12:04:28,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:04:28,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:28,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:04:28,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:04:28,171 INFO L87 Difference]: Start difference. First operand 5351 states and 15631 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:28,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:28,283 INFO L93 Difference]: Finished difference Result 6268 states and 17543 transitions. [2021-08-21 12:04:28,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:04:28,284 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:28,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:28,294 INFO L225 Difference]: With dead ends: 6268 [2021-08-21 12:04:28,294 INFO L226 Difference]: Without dead ends: 6268 [2021-08-21 12:04:28,294 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:04:28,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6268 states. [2021-08-21 12:04:28,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6268 to 5264. [2021-08-21 12:04:28,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5264 states, 5263 states have (on average 2.9108873266197985) internal successors, (15320), 5263 states have internal predecessors, (15320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:28,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5264 states to 5264 states and 15320 transitions. [2021-08-21 12:04:28,382 INFO L78 Accepts]: Start accepts. Automaton has 5264 states and 15320 transitions. Word has length 22 [2021-08-21 12:04:28,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:28,382 INFO L470 AbstractCegarLoop]: Abstraction has 5264 states and 15320 transitions. [2021-08-21 12:04:28,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:28,382 INFO L276 IsEmpty]: Start isEmpty. Operand 5264 states and 15320 transitions. [2021-08-21 12:04:28,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:28,389 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:28,389 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:28,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:28,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:28,605 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:28,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:28,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1591672797, now seen corresponding path program 227 times [2021-08-21 12:04:28,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:28,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174727534] [2021-08-21 12:04:28,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:28,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:28,685 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:28,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:28,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174727534] [2021-08-21 12:04:28,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174727534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:28,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374022624] [2021-08-21 12:04:28,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:04:28,686 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:28,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:28,686 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:28,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2021-08-21 12:04:30,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:04:30,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:30,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:30,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:30,305 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:30,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374022624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:30,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:30,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 12:04:30,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122538037] [2021-08-21 12:04:30,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:04:30,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:30,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:04:30,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:04:30,306 INFO L87 Difference]: Start difference. First operand 5264 states and 15320 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:30,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:30,466 INFO L93 Difference]: Finished difference Result 8260 states and 23294 transitions. [2021-08-21 12:04:30,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:04:30,466 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:30,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:30,481 INFO L225 Difference]: With dead ends: 8260 [2021-08-21 12:04:30,481 INFO L226 Difference]: Without dead ends: 8260 [2021-08-21 12:04:30,481 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 117.0ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:04:30,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8260 states. [2021-08-21 12:04:30,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8260 to 6573. [2021-08-21 12:04:30,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6573 states, 6572 states have (on average 2.951004260499087) internal successors, (19394), 6572 states have internal predecessors, (19394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:30,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6573 states to 6573 states and 19394 transitions. [2021-08-21 12:04:30,604 INFO L78 Accepts]: Start accepts. Automaton has 6573 states and 19394 transitions. Word has length 22 [2021-08-21 12:04:30,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:30,604 INFO L470 AbstractCegarLoop]: Abstraction has 6573 states and 19394 transitions. [2021-08-21 12:04:30,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:30,605 INFO L276 IsEmpty]: Start isEmpty. Operand 6573 states and 19394 transitions. [2021-08-21 12:04:30,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:30,613 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:30,613 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:30,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:30,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:30,834 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:30,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:30,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1941651355, now seen corresponding path program 228 times [2021-08-21 12:04:30,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:30,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088088945] [2021-08-21 12:04:30,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:30,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:30,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:30,915 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:30,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:30,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088088945] [2021-08-21 12:04:30,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088088945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:30,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269126868] [2021-08-21 12:04:30,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:04:30,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:30,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:30,917 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:30,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2021-08-21 12:04:32,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:04:32,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:32,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:32,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:32,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269126868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:32,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:32,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:04:32,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909510738] [2021-08-21 12:04:32,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:04:32,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:32,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:04:32,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:04:32,529 INFO L87 Difference]: Start difference. First operand 6573 states and 19394 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:32,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:32,679 INFO L93 Difference]: Finished difference Result 8138 states and 23097 transitions. [2021-08-21 12:04:32,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:04:32,679 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:32,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:32,693 INFO L225 Difference]: With dead ends: 8138 [2021-08-21 12:04:32,693 INFO L226 Difference]: Without dead ends: 8138 [2021-08-21 12:04:32,694 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:04:32,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8138 states. [2021-08-21 12:04:32,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8138 to 5196. [2021-08-21 12:04:32,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5196 states, 5195 states have (on average 2.9162656400384988) internal successors, (15150), 5195 states have internal predecessors, (15150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:32,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5196 states to 5196 states and 15150 transitions. [2021-08-21 12:04:32,799 INFO L78 Accepts]: Start accepts. Automaton has 5196 states and 15150 transitions. Word has length 22 [2021-08-21 12:04:32,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:32,799 INFO L470 AbstractCegarLoop]: Abstraction has 5196 states and 15150 transitions. [2021-08-21 12:04:32,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:32,800 INFO L276 IsEmpty]: Start isEmpty. Operand 5196 states and 15150 transitions. [2021-08-21 12:04:32,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:32,806 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:32,806 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:32,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:33,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:33,019 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:33,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:33,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1090162997, now seen corresponding path program 229 times [2021-08-21 12:04:33,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:33,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131331869] [2021-08-21 12:04:33,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:33,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:33,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:33,084 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:33,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:33,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131331869] [2021-08-21 12:04:33,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131331869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:33,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30830765] [2021-08-21 12:04:33,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:04:33,084 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:33,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:33,085 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:33,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2021-08-21 12:04:34,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:34,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:34,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:34,658 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:34,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30830765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:34,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:34,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:04:34,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991974628] [2021-08-21 12:04:34,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:04:34,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:34,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:04:34,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:04:34,659 INFO L87 Difference]: Start difference. First operand 5196 states and 15150 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:34,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:34,811 INFO L93 Difference]: Finished difference Result 5552 states and 15650 transitions. [2021-08-21 12:04:34,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:04:34,812 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:34,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:34,821 INFO L225 Difference]: With dead ends: 5552 [2021-08-21 12:04:34,821 INFO L226 Difference]: Without dead ends: 5548 [2021-08-21 12:04:34,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 88.7ms TimeCoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:04:34,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5548 states. [2021-08-21 12:04:34,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5548 to 5208. [2021-08-21 12:04:34,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5208 states, 5207 states have (on average 2.915114269252929) internal successors, (15179), 5207 states have internal predecessors, (15179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:34,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5208 states to 5208 states and 15179 transitions. [2021-08-21 12:04:34,909 INFO L78 Accepts]: Start accepts. Automaton has 5208 states and 15179 transitions. Word has length 22 [2021-08-21 12:04:34,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:34,909 INFO L470 AbstractCegarLoop]: Abstraction has 5208 states and 15179 transitions. [2021-08-21 12:04:34,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:34,909 INFO L276 IsEmpty]: Start isEmpty. Operand 5208 states and 15179 transitions. [2021-08-21 12:04:34,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:34,915 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:34,915 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:34,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:35,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-08-21 12:04:35,121 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:35,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:35,122 INFO L82 PathProgramCache]: Analyzing trace with hash -628180709, now seen corresponding path program 230 times [2021-08-21 12:04:35,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:35,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39488032] [2021-08-21 12:04:35,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:35,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:35,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:35,186 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:35,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:35,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39488032] [2021-08-21 12:04:35,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39488032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:35,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418973712] [2021-08-21 12:04:35,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:04:35,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:35,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:35,187 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:35,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2021-08-21 12:04:36,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:04:36,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:36,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:36,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:36,780 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:36,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418973712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:36,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:36,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:04:36,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435077225] [2021-08-21 12:04:36,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:04:36,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:36,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:04:36,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:04:36,781 INFO L87 Difference]: Start difference. First operand 5208 states and 15179 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:36,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:36,859 INFO L93 Difference]: Finished difference Result 5928 states and 16567 transitions. [2021-08-21 12:04:36,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:04:36,859 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:36,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:36,868 INFO L225 Difference]: With dead ends: 5928 [2021-08-21 12:04:36,868 INFO L226 Difference]: Without dead ends: 5928 [2021-08-21 12:04:36,869 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=100, Invalid=140, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:04:36,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5928 states. [2021-08-21 12:04:36,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5928 to 5220. [2021-08-21 12:04:36,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5220 states, 5219 states have (on average 2.913393370377467) internal successors, (15205), 5219 states have internal predecessors, (15205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:36,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5220 states to 5220 states and 15205 transitions. [2021-08-21 12:04:36,957 INFO L78 Accepts]: Start accepts. Automaton has 5220 states and 15205 transitions. Word has length 22 [2021-08-21 12:04:36,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:36,957 INFO L470 AbstractCegarLoop]: Abstraction has 5220 states and 15205 transitions. [2021-08-21 12:04:36,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:36,957 INFO L276 IsEmpty]: Start isEmpty. Operand 5220 states and 15205 transitions. [2021-08-21 12:04:36,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:36,963 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:36,963 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:36,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:37,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-08-21 12:04:37,184 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:37,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:37,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1082432599, now seen corresponding path program 231 times [2021-08-21 12:04:37,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:37,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819943338] [2021-08-21 12:04:37,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:37,184 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:37,253 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:37,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:37,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819943338] [2021-08-21 12:04:37,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819943338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:37,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905165670] [2021-08-21 12:04:37,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:04:37,254 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:37,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:37,255 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:37,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2021-08-21 12:04:38,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:04:38,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:38,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:38,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:38,860 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:38,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905165670] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:38,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:38,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 12:04:38,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913221793] [2021-08-21 12:04:38,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:04:38,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:38,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:04:38,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:04:38,861 INFO L87 Difference]: Start difference. First operand 5220 states and 15205 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:38,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:38,950 INFO L93 Difference]: Finished difference Result 5958 states and 16661 transitions. [2021-08-21 12:04:38,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:04:38,950 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:38,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:38,959 INFO L225 Difference]: With dead ends: 5958 [2021-08-21 12:04:38,959 INFO L226 Difference]: Without dead ends: 5958 [2021-08-21 12:04:38,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:04:38,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5958 states. [2021-08-21 12:04:39,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5958 to 5215. [2021-08-21 12:04:39,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5215 states, 5214 states have (on average 2.9119677790563867) internal successors, (15183), 5214 states have internal predecessors, (15183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:39,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5215 states to 5215 states and 15183 transitions. [2021-08-21 12:04:39,045 INFO L78 Accepts]: Start accepts. Automaton has 5215 states and 15183 transitions. Word has length 22 [2021-08-21 12:04:39,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:39,045 INFO L470 AbstractCegarLoop]: Abstraction has 5215 states and 15183 transitions. [2021-08-21 12:04:39,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:39,045 INFO L276 IsEmpty]: Start isEmpty. Operand 5215 states and 15183 transitions. [2021-08-21 12:04:39,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:39,052 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:39,052 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:39,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:39,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-08-21 12:04:39,273 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:39,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:39,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1723129701, now seen corresponding path program 232 times [2021-08-21 12:04:39,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:39,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408808511] [2021-08-21 12:04:39,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:39,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:39,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:39,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408808511] [2021-08-21 12:04:39,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408808511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:39,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409205438] [2021-08-21 12:04:39,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:04:39,346 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:39,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:39,347 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:39,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2021-08-21 12:04:40,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:04:40,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:40,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:40,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:40,954 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:40,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409205438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:40,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:40,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 12:04:40,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556939811] [2021-08-21 12:04:40,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:04:40,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:40,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:04:40,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:04:40,955 INFO L87 Difference]: Start difference. First operand 5215 states and 15183 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:41,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:41,042 INFO L93 Difference]: Finished difference Result 8709 states and 25165 transitions. [2021-08-21 12:04:41,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:04:41,042 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:41,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:41,058 INFO L225 Difference]: With dead ends: 8709 [2021-08-21 12:04:41,058 INFO L226 Difference]: Without dead ends: 8709 [2021-08-21 12:04:41,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:04:41,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8709 states. [2021-08-21 12:04:41,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8709 to 8209. [2021-08-21 12:04:41,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8209 states, 8208 states have (on average 2.9762426900584797) internal successors, (24429), 8208 states have internal predecessors, (24429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:41,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8209 states to 8209 states and 24429 transitions. [2021-08-21 12:04:41,209 INFO L78 Accepts]: Start accepts. Automaton has 8209 states and 24429 transitions. Word has length 22 [2021-08-21 12:04:41,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:41,210 INFO L470 AbstractCegarLoop]: Abstraction has 8209 states and 24429 transitions. [2021-08-21 12:04:41,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:41,210 INFO L276 IsEmpty]: Start isEmpty. Operand 8209 states and 24429 transitions. [2021-08-21 12:04:41,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:41,220 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:41,220 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:41,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:41,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-08-21 12:04:41,440 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:41,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:41,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1498752215, now seen corresponding path program 233 times [2021-08-21 12:04:41,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:41,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914602378] [2021-08-21 12:04:41,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:41,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:41,518 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:41,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:41,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914602378] [2021-08-21 12:04:41,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914602378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:41,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71890612] [2021-08-21 12:04:41,518 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:04:41,518 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:41,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:41,519 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:41,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2021-08-21 12:04:43,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:04:43,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:43,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:43,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:43,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71890612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:43,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:43,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:04:43,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688366911] [2021-08-21 12:04:43,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:04:43,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:43,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:04:43,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:04:43,148 INFO L87 Difference]: Start difference. First operand 8209 states and 24429 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:43,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:43,276 INFO L93 Difference]: Finished difference Result 9108 states and 26200 transitions. [2021-08-21 12:04:43,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:04:43,276 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:43,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:43,292 INFO L225 Difference]: With dead ends: 9108 [2021-08-21 12:04:43,292 INFO L226 Difference]: Without dead ends: 9108 [2021-08-21 12:04:43,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:04:43,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9108 states. [2021-08-21 12:04:43,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9108 to 8083. [2021-08-21 12:04:43,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8083 states, 8082 states have (on average 2.9726552833457065) internal successors, (24025), 8082 states have internal predecessors, (24025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:43,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8083 states to 8083 states and 24025 transitions. [2021-08-21 12:04:43,437 INFO L78 Accepts]: Start accepts. Automaton has 8083 states and 24025 transitions. Word has length 22 [2021-08-21 12:04:43,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:43,437 INFO L470 AbstractCegarLoop]: Abstraction has 8083 states and 24025 transitions. [2021-08-21 12:04:43,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:43,437 INFO L276 IsEmpty]: Start isEmpty. Operand 8083 states and 24025 transitions. [2021-08-21 12:04:43,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:43,447 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:43,447 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:43,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:43,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:43,662 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:43,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:43,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1702123493, now seen corresponding path program 234 times [2021-08-21 12:04:43,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:43,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132951226] [2021-08-21 12:04:43,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:43,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:43,744 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:43,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:43,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132951226] [2021-08-21 12:04:43,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132951226] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:43,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014211257] [2021-08-21 12:04:43,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:04:43,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:43,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:43,745 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:43,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2021-08-21 12:04:45,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:04:45,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:45,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:45,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:45,368 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:45,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014211257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:45,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:45,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:04:45,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925919501] [2021-08-21 12:04:45,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:04:45,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:45,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:04:45,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:04:45,369 INFO L87 Difference]: Start difference. First operand 8083 states and 24025 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:45,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:45,590 INFO L93 Difference]: Finished difference Result 12769 states and 37519 transitions. [2021-08-21 12:04:45,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:04:45,591 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:45,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:45,618 INFO L225 Difference]: With dead ends: 12769 [2021-08-21 12:04:45,618 INFO L226 Difference]: Without dead ends: 12769 [2021-08-21 12:04:45,618 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 148.1ms TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:04:45,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12769 states. [2021-08-21 12:04:45,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12769 to 11311. [2021-08-21 12:04:45,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11311 states, 11310 states have (on average 3.0222811671087535) internal successors, (34182), 11310 states have internal predecessors, (34182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:45,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11311 states to 11311 states and 34182 transitions. [2021-08-21 12:04:45,840 INFO L78 Accepts]: Start accepts. Automaton has 11311 states and 34182 transitions. Word has length 22 [2021-08-21 12:04:45,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:45,840 INFO L470 AbstractCegarLoop]: Abstraction has 11311 states and 34182 transitions. [2021-08-21 12:04:45,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:45,841 INFO L276 IsEmpty]: Start isEmpty. Operand 11311 states and 34182 transitions. [2021-08-21 12:04:45,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:45,853 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:45,853 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:45,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Ended with exit code 0 [2021-08-21 12:04:46,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-08-21 12:04:46,066 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:46,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:46,066 INFO L82 PathProgramCache]: Analyzing trace with hash 860047847, now seen corresponding path program 235 times [2021-08-21 12:04:46,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:46,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530302797] [2021-08-21 12:04:46,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:46,067 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:46,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:46,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:46,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530302797] [2021-08-21 12:04:46,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530302797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:46,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451945137] [2021-08-21 12:04:46,138 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:04:46,138 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:46,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:46,139 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:46,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2021-08-21 12:04:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:47,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:47,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:47,787 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:47,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451945137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:47,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:47,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 12:04:47,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437249803] [2021-08-21 12:04:47,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:04:47,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:47,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:04:47,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:04:47,788 INFO L87 Difference]: Start difference. First operand 11311 states and 34182 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:47,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:47,897 INFO L93 Difference]: Finished difference Result 11823 states and 35156 transitions. [2021-08-21 12:04:47,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:04:47,897 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:47,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:47,919 INFO L225 Difference]: With dead ends: 11823 [2021-08-21 12:04:47,920 INFO L226 Difference]: Without dead ends: 11823 [2021-08-21 12:04:47,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:04:47,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11823 states. [2021-08-21 12:04:48,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11823 to 11297. [2021-08-21 12:04:48,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11297 states, 11296 states have (on average 3.021866147308782) internal successors, (34135), 11296 states have internal predecessors, (34135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:48,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11297 states to 11297 states and 34135 transitions. [2021-08-21 12:04:48,148 INFO L78 Accepts]: Start accepts. Automaton has 11297 states and 34135 transitions. Word has length 22 [2021-08-21 12:04:48,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:48,148 INFO L470 AbstractCegarLoop]: Abstraction has 11297 states and 34135 transitions. [2021-08-21 12:04:48,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:48,148 INFO L276 IsEmpty]: Start isEmpty. Operand 11297 states and 34135 transitions. [2021-08-21 12:04:48,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:48,160 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:48,160 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:48,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:48,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-08-21 12:04:48,381 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:48,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:48,381 INFO L82 PathProgramCache]: Analyzing trace with hash -213037533, now seen corresponding path program 236 times [2021-08-21 12:04:48,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:48,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834664159] [2021-08-21 12:04:48,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:48,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:48,460 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:48,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:48,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834664159] [2021-08-21 12:04:48,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834664159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:48,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228535394] [2021-08-21 12:04:48,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:04:48,460 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:48,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:48,461 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:48,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2021-08-21 12:04:49,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:04:49,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:49,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:49,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:50,040 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:50,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228535394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:50,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:50,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:04:50,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800263494] [2021-08-21 12:04:50,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:04:50,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:50,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:04:50,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:04:50,041 INFO L87 Difference]: Start difference. First operand 11297 states and 34135 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:50,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:50,234 INFO L93 Difference]: Finished difference Result 12864 states and 38094 transitions. [2021-08-21 12:04:50,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:04:50,235 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:50,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:50,256 INFO L225 Difference]: With dead ends: 12864 [2021-08-21 12:04:50,256 INFO L226 Difference]: Without dead ends: 12864 [2021-08-21 12:04:50,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:04:50,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12864 states. [2021-08-21 12:04:50,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12864 to 7243. [2021-08-21 12:04:50,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7243 states, 7242 states have (on average 2.951118475559238) internal successors, (21372), 7242 states have internal predecessors, (21372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:50,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7243 states to 7243 states and 21372 transitions. [2021-08-21 12:04:50,420 INFO L78 Accepts]: Start accepts. Automaton has 7243 states and 21372 transitions. Word has length 22 [2021-08-21 12:04:50,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:50,420 INFO L470 AbstractCegarLoop]: Abstraction has 7243 states and 21372 transitions. [2021-08-21 12:04:50,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:50,421 INFO L276 IsEmpty]: Start isEmpty. Operand 7243 states and 21372 transitions. [2021-08-21 12:04:50,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:50,430 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:50,430 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:50,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Ended with exit code 0 [2021-08-21 12:04:50,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-08-21 12:04:50,651 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:50,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:50,651 INFO L82 PathProgramCache]: Analyzing trace with hash 881054055, now seen corresponding path program 237 times [2021-08-21 12:04:50,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:50,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826698042] [2021-08-21 12:04:50,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:50,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:50,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:50,734 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:50,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:50,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826698042] [2021-08-21 12:04:50,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826698042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:50,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270851110] [2021-08-21 12:04:50,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:04:50,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:50,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:50,735 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:50,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2021-08-21 12:04:52,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:04:52,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:52,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:52,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:52,407 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:52,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270851110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:52,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:52,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:04:52,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911430686] [2021-08-21 12:04:52,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:04:52,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:52,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:04:52,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:04:52,408 INFO L87 Difference]: Start difference. First operand 7243 states and 21372 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:52,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:52,616 INFO L93 Difference]: Finished difference Result 10603 states and 30440 transitions. [2021-08-21 12:04:52,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:04:52,616 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:52,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:52,634 INFO L225 Difference]: With dead ends: 10603 [2021-08-21 12:04:52,634 INFO L226 Difference]: Without dead ends: 10603 [2021-08-21 12:04:52,634 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 149.7ms TimeCoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:04:52,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10603 states. [2021-08-21 12:04:52,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10603 to 6152. [2021-08-21 12:04:52,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6152 states, 6151 states have (on average 2.9359453747358155) internal successors, (18059), 6151 states have internal predecessors, (18059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:52,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6152 states to 6152 states and 18059 transitions. [2021-08-21 12:04:52,770 INFO L78 Accepts]: Start accepts. Automaton has 6152 states and 18059 transitions. Word has length 22 [2021-08-21 12:04:52,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:52,770 INFO L470 AbstractCegarLoop]: Abstraction has 6152 states and 18059 transitions. [2021-08-21 12:04:52,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:52,770 INFO L276 IsEmpty]: Start isEmpty. Operand 6152 states and 18059 transitions. [2021-08-21 12:04:52,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:52,777 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:52,777 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:52,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Ended with exit code 0 [2021-08-21 12:04:52,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:52,990 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:52,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:52,990 INFO L82 PathProgramCache]: Analyzing trace with hash -384402717, now seen corresponding path program 238 times [2021-08-21 12:04:52,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:52,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763277629] [2021-08-21 12:04:52,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:52,991 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:53,052 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:04:53,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:53,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763277629] [2021-08-21 12:04:53,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763277629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:53,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636510489] [2021-08-21 12:04:53,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:04:53,052 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:53,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:53,053 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:53,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2021-08-21 12:04:54,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:04:54,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:54,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:54,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:54,686 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:04:54,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636510489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:54,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:54,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 12:04:54,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563135041] [2021-08-21 12:04:54,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:04:54,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:54,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:04:54,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:04:54,687 INFO L87 Difference]: Start difference. First operand 6152 states and 18059 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:54,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:54,832 INFO L93 Difference]: Finished difference Result 6418 states and 18385 transitions. [2021-08-21 12:04:54,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:04:54,832 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:54,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:54,844 INFO L225 Difference]: With dead ends: 6418 [2021-08-21 12:04:54,844 INFO L226 Difference]: Without dead ends: 6414 [2021-08-21 12:04:54,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:04:54,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6414 states. [2021-08-21 12:04:54,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6414 to 6152. [2021-08-21 12:04:54,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6152 states, 6151 states have (on average 2.935295073971712) internal successors, (18055), 6151 states have internal predecessors, (18055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:54,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6152 states to 6152 states and 18055 transitions. [2021-08-21 12:04:54,954 INFO L78 Accepts]: Start accepts. Automaton has 6152 states and 18055 transitions. Word has length 22 [2021-08-21 12:04:54,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:54,954 INFO L470 AbstractCegarLoop]: Abstraction has 6152 states and 18055 transitions. [2021-08-21 12:04:54,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:54,954 INFO L276 IsEmpty]: Start isEmpty. Operand 6152 states and 18055 transitions. [2021-08-21 12:04:54,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:54,962 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:54,962 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:54,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Ended with exit code 0 [2021-08-21 12:04:55,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:55,179 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:55,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:55,179 INFO L82 PathProgramCache]: Analyzing trace with hash 456742819, now seen corresponding path program 239 times [2021-08-21 12:04:55,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:55,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874098506] [2021-08-21 12:04:55,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:55,179 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:55,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:55,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874098506] [2021-08-21 12:04:55,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874098506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:55,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501455489] [2021-08-21 12:04:55,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:04:55,260 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:55,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:55,261 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:55,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2021-08-21 12:04:56,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:04:56,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:56,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:56,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:56,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501455489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:56,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:56,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:04:56,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146216543] [2021-08-21 12:04:56,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:04:56,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:56,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:04:56,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:04:56,949 INFO L87 Difference]: Start difference. First operand 6152 states and 18055 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:57,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:57,131 INFO L93 Difference]: Finished difference Result 7608 states and 21502 transitions. [2021-08-21 12:04:57,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:04:57,131 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:57,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:57,142 INFO L225 Difference]: With dead ends: 7608 [2021-08-21 12:04:57,142 INFO L226 Difference]: Without dead ends: 7608 [2021-08-21 12:04:57,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 135.4ms TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:04:57,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7608 states. [2021-08-21 12:04:57,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7608 to 4992. [2021-08-21 12:04:57,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4992 states, 4991 states have (on average 2.9130434782608696) internal successors, (14539), 4991 states have internal predecessors, (14539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:57,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4992 states to 4992 states and 14539 transitions. [2021-08-21 12:04:57,233 INFO L78 Accepts]: Start accepts. Automaton has 4992 states and 14539 transitions. Word has length 22 [2021-08-21 12:04:57,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:57,233 INFO L470 AbstractCegarLoop]: Abstraction has 4992 states and 14539 transitions. [2021-08-21 12:04:57,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:57,233 INFO L276 IsEmpty]: Start isEmpty. Operand 4992 states and 14539 transitions. [2021-08-21 12:04:57,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:57,239 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:57,239 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:57,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:57,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable242 [2021-08-21 12:04:57,454 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:57,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:57,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1890909439, now seen corresponding path program 240 times [2021-08-21 12:04:57,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:57,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825067345] [2021-08-21 12:04:57,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:57,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:57,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:57,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:57,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825067345] [2021-08-21 12:04:57,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825067345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:57,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790193054] [2021-08-21 12:04:57,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:04:57,521 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:57,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:57,522 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:57,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2021-08-21 12:04:59,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:04:59,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:59,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:59,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:59,224 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:59,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790193054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:59,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:59,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:04:59,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577402537] [2021-08-21 12:04:59,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:04:59,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:59,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:04:59,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:04:59,225 INFO L87 Difference]: Start difference. First operand 4992 states and 14539 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:59,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:59,372 INFO L93 Difference]: Finished difference Result 5314 states and 14981 transitions. [2021-08-21 12:04:59,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:04:59,372 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:59,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:59,381 INFO L225 Difference]: With dead ends: 5314 [2021-08-21 12:04:59,381 INFO L226 Difference]: Without dead ends: 5310 [2021-08-21 12:04:59,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:04:59,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5310 states. [2021-08-21 12:04:59,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5310 to 5004. [2021-08-21 12:04:59,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5004 states, 5003 states have (on average 2.9118528882670396) internal successors, (14568), 5003 states have internal predecessors, (14568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:59,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5004 states to 5004 states and 14568 transitions. [2021-08-21 12:04:59,468 INFO L78 Accepts]: Start accepts. Automaton has 5004 states and 14568 transitions. Word has length 22 [2021-08-21 12:04:59,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:59,468 INFO L470 AbstractCegarLoop]: Abstraction has 5004 states and 14568 transitions. [2021-08-21 12:04:59,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:59,469 INFO L276 IsEmpty]: Start isEmpty. Operand 5004 states and 14568 transitions. [2021-08-21 12:04:59,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:59,475 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:59,475 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:59,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Ended with exit code 0 [2021-08-21 12:04:59,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-08-21 12:04:59,695 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:59,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:59,696 INFO L82 PathProgramCache]: Analyzing trace with hash 685714151, now seen corresponding path program 241 times [2021-08-21 12:04:59,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:59,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602629063] [2021-08-21 12:04:59,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:59,696 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:59,763 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:59,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:59,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602629063] [2021-08-21 12:04:59,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602629063] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:59,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97994513] [2021-08-21 12:04:59,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:04:59,763 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:59,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:59,764 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:59,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2021-08-21 12:05:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:01,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:01,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:01,411 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:01,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97994513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:01,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:01,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:05:01,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464109697] [2021-08-21 12:05:01,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:05:01,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:01,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:05:01,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:05:01,412 INFO L87 Difference]: Start difference. First operand 5004 states and 14568 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:01,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:01,498 INFO L93 Difference]: Finished difference Result 5731 states and 15999 transitions. [2021-08-21 12:05:01,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:05:01,499 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:01,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:01,508 INFO L225 Difference]: With dead ends: 5731 [2021-08-21 12:05:01,508 INFO L226 Difference]: Without dead ends: 5731 [2021-08-21 12:05:01,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=111, Invalid=161, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:05:01,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5731 states. [2021-08-21 12:05:01,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5731 to 5012. [2021-08-21 12:05:01,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5012 states, 5011 states have (on average 2.910995809219717) internal successors, (14587), 5011 states have internal predecessors, (14587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:01,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5012 states to 5012 states and 14587 transitions. [2021-08-21 12:05:01,594 INFO L78 Accepts]: Start accepts. Automaton has 5012 states and 14587 transitions. Word has length 22 [2021-08-21 12:05:01,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:01,594 INFO L470 AbstractCegarLoop]: Abstraction has 5012 states and 14587 transitions. [2021-08-21 12:05:01,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:01,594 INFO L276 IsEmpty]: Start isEmpty. Operand 5012 states and 14587 transitions. [2021-08-21 12:05:01,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:01,600 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:01,600 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:01,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:01,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:01,816 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:01,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:01,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1898639837, now seen corresponding path program 242 times [2021-08-21 12:05:01,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:01,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712533248] [2021-08-21 12:05:01,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:01,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:01,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:01,887 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:01,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:01,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712533248] [2021-08-21 12:05:01,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712533248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:01,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43421520] [2021-08-21 12:05:01,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:05:01,888 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:01,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:01,889 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:01,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2021-08-21 12:05:03,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:05:03,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:03,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:03,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:03,592 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:03,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43421520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:03,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:03,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 12:05:03,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432781952] [2021-08-21 12:05:03,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:05:03,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:03,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:05:03,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:05:03,593 INFO L87 Difference]: Start difference. First operand 5012 states and 14587 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:03,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:03,703 INFO L93 Difference]: Finished difference Result 5919 states and 16514 transitions. [2021-08-21 12:05:03,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:05:03,704 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:03,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:03,713 INFO L225 Difference]: With dead ends: 5919 [2021-08-21 12:05:03,713 INFO L226 Difference]: Without dead ends: 5919 [2021-08-21 12:05:03,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 81.8ms TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:05:03,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5919 states. [2021-08-21 12:05:03,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5919 to 5016. [2021-08-21 12:05:03,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5016 states, 5015 states have (on average 2.910667996011964) internal successors, (14597), 5015 states have internal predecessors, (14597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:03,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5016 states to 5016 states and 14597 transitions. [2021-08-21 12:05:03,798 INFO L78 Accepts]: Start accepts. Automaton has 5016 states and 14597 transitions. Word has length 22 [2021-08-21 12:05:03,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:03,798 INFO L470 AbstractCegarLoop]: Abstraction has 5016 states and 14597 transitions. [2021-08-21 12:05:03,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:03,798 INFO L276 IsEmpty]: Start isEmpty. Operand 5016 states and 14597 transitions. [2021-08-21 12:05:03,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:03,804 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:03,804 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:03,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:04,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-08-21 12:05:04,024 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:04,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:04,024 INFO L82 PathProgramCache]: Analyzing trace with hash -409234841, now seen corresponding path program 243 times [2021-08-21 12:05:04,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:04,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609709263] [2021-08-21 12:05:04,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:04,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:04,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:04,101 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:04,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:04,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609709263] [2021-08-21 12:05:04,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609709263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:04,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596866407] [2021-08-21 12:05:04,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:05:04,101 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:04,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:04,102 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:04,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2021-08-21 12:05:05,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:05:05,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:05,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:05,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:05,851 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:05,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596866407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:05,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:05,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 12:05:05,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052146070] [2021-08-21 12:05:05,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:05:05,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:05,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:05:05,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:05:05,852 INFO L87 Difference]: Start difference. First operand 5016 states and 14597 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:05,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:05,963 INFO L93 Difference]: Finished difference Result 5806 states and 16251 transitions. [2021-08-21 12:05:05,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:05:05,963 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:05,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:05,972 INFO L225 Difference]: With dead ends: 5806 [2021-08-21 12:05:05,973 INFO L226 Difference]: Without dead ends: 5806 [2021-08-21 12:05:05,973 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:05:05,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5806 states. [2021-08-21 12:05:06,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5806 to 4962. [2021-08-21 12:05:06,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4962 states, 4961 states have (on average 2.9072767587180004) internal successors, (14423), 4961 states have internal predecessors, (14423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:06,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4962 states to 4962 states and 14423 transitions. [2021-08-21 12:05:06,060 INFO L78 Accepts]: Start accepts. Automaton has 4962 states and 14423 transitions. Word has length 22 [2021-08-21 12:05:06,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:06,061 INFO L470 AbstractCegarLoop]: Abstraction has 4962 states and 14423 transitions. [2021-08-21 12:05:06,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:06,061 INFO L276 IsEmpty]: Start isEmpty. Operand 4962 states and 14423 transitions. [2021-08-21 12:05:06,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:06,067 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:06,067 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:06,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Ended with exit code 0 [2021-08-21 12:05:06,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-08-21 12:05:06,272 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:06,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:06,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1482320221, now seen corresponding path program 244 times [2021-08-21 12:05:06,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:06,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720698721] [2021-08-21 12:05:06,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:06,272 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:06,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:06,348 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:06,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:06,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720698721] [2021-08-21 12:05:06,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720698721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:06,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089822017] [2021-08-21 12:05:06,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:05:06,348 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:06,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:06,349 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:06,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2021-08-21 12:05:07,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:05:07,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:07,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:07,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:08,033 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:08,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089822017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:08,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:08,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 12:05:08,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286719625] [2021-08-21 12:05:08,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:05:08,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:08,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:05:08,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:05:08,034 INFO L87 Difference]: Start difference. First operand 4962 states and 14423 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:08,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:08,135 INFO L93 Difference]: Finished difference Result 8057 states and 23088 transitions. [2021-08-21 12:05:08,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:05:08,135 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:08,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:08,148 INFO L225 Difference]: With dead ends: 8057 [2021-08-21 12:05:08,148 INFO L226 Difference]: Without dead ends: 8057 [2021-08-21 12:05:08,148 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:05:08,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8057 states. [2021-08-21 12:05:08,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8057 to 7203. [2021-08-21 12:05:08,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7203 states, 7202 states have (on average 2.9568175506803667) internal successors, (21295), 7202 states have internal predecessors, (21295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:08,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7203 states to 7203 states and 21295 transitions. [2021-08-21 12:05:08,280 INFO L78 Accepts]: Start accepts. Automaton has 7203 states and 21295 transitions. Word has length 22 [2021-08-21 12:05:08,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:08,280 INFO L470 AbstractCegarLoop]: Abstraction has 7203 states and 21295 transitions. [2021-08-21 12:05:08,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:08,280 INFO L276 IsEmpty]: Start isEmpty. Operand 7203 states and 21295 transitions. [2021-08-21 12:05:08,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:08,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:08,290 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:08,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:08,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-08-21 12:05:08,494 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:08,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:08,495 INFO L82 PathProgramCache]: Analyzing trace with hash -388228633, now seen corresponding path program 245 times [2021-08-21 12:05:08,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:08,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240458857] [2021-08-21 12:05:08,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:08,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:08,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:08,615 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:08,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:08,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240458857] [2021-08-21 12:05:08,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240458857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:08,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375025626] [2021-08-21 12:05:08,616 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:05:08,616 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:08,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:08,617 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:08,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2021-08-21 12:05:10,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:05:10,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:10,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:10,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:10,300 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:10,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375025626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:10,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:10,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:05:10,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630180762] [2021-08-21 12:05:10,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:05:10,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:10,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:05:10,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:05:10,301 INFO L87 Difference]: Start difference. First operand 7203 states and 21295 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:10,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:10,472 INFO L93 Difference]: Finished difference Result 8365 states and 23865 transitions. [2021-08-21 12:05:10,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:05:10,472 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:10,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:10,488 INFO L225 Difference]: With dead ends: 8365 [2021-08-21 12:05:10,488 INFO L226 Difference]: Without dead ends: 8365 [2021-08-21 12:05:10,489 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 138.7ms TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:05:10,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8365 states. [2021-08-21 12:05:10,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8365 to 7059. [2021-08-21 12:05:10,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7059 states, 7058 states have (on average 2.9539529611788042) internal successors, (20849), 7058 states have internal predecessors, (20849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:10,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7059 states to 7059 states and 20849 transitions. [2021-08-21 12:05:10,665 INFO L78 Accepts]: Start accepts. Automaton has 7059 states and 20849 transitions. Word has length 22 [2021-08-21 12:05:10,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:10,665 INFO L470 AbstractCegarLoop]: Abstraction has 7059 states and 20849 transitions. [2021-08-21 12:05:10,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:10,665 INFO L276 IsEmpty]: Start isEmpty. Operand 7059 states and 20849 transitions. [2021-08-21 12:05:10,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:10,674 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:10,674 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:10,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Ended with exit code 0 [2021-08-21 12:05:10,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:10,895 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:10,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:10,896 INFO L82 PathProgramCache]: Analyzing trace with hash -831127773, now seen corresponding path program 246 times [2021-08-21 12:05:10,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:10,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812484818] [2021-08-21 12:05:10,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:10,896 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:10,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:10,985 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:10,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:10,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812484818] [2021-08-21 12:05:10,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812484818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:10,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541664111] [2021-08-21 12:05:10,985 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:05:10,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:10,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:10,986 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:10,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2021-08-21 12:05:12,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:05:12,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:12,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:12,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:12,732 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:12,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541664111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:12,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:12,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:05:12,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789064360] [2021-08-21 12:05:12,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:05:12,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:12,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:05:12,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:05:12,733 INFO L87 Difference]: Start difference. First operand 7059 states and 20849 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:12,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:12,991 INFO L93 Difference]: Finished difference Result 10847 states and 31452 transitions. [2021-08-21 12:05:12,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:05:12,991 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:12,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:13,012 INFO L225 Difference]: With dead ends: 10847 [2021-08-21 12:05:13,012 INFO L226 Difference]: Without dead ends: 10847 [2021-08-21 12:05:13,012 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 192.7ms TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:05:13,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10847 states. [2021-08-21 12:05:13,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10847 to 8974. [2021-08-21 12:05:13,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8974 states, 8973 states have (on average 3.0011144544745347) internal successors, (26929), 8973 states have internal predecessors, (26929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:13,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8974 states to 8974 states and 26929 transitions. [2021-08-21 12:05:13,220 INFO L78 Accepts]: Start accepts. Automaton has 8974 states and 26929 transitions. Word has length 22 [2021-08-21 12:05:13,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:13,220 INFO L470 AbstractCegarLoop]: Abstraction has 8974 states and 26929 transitions. [2021-08-21 12:05:13,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:13,220 INFO L276 IsEmpty]: Start isEmpty. Operand 8974 states and 26929 transitions. [2021-08-21 12:05:13,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:13,230 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:13,230 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:13,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Ended with exit code 0 [2021-08-21 12:05:13,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:13,432 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:13,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:13,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1286772439, now seen corresponding path program 247 times [2021-08-21 12:05:13,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:13,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728166946] [2021-08-21 12:05:13,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:13,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:13,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:13,507 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:13,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:13,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728166946] [2021-08-21 12:05:13,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728166946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:13,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171515658] [2021-08-21 12:05:13,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:05:13,507 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:13,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:13,508 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:13,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2021-08-21 12:05:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:15,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:15,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:15,228 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:15,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171515658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:15,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:15,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:05:15,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046965862] [2021-08-21 12:05:15,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:05:15,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:15,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:05:15,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:05:15,229 INFO L87 Difference]: Start difference. First operand 8974 states and 26929 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:15,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:15,321 INFO L93 Difference]: Finished difference Result 9292 states and 27341 transitions. [2021-08-21 12:05:15,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:05:15,321 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:15,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:15,335 INFO L225 Difference]: With dead ends: 9292 [2021-08-21 12:05:15,335 INFO L226 Difference]: Without dead ends: 9291 [2021-08-21 12:05:15,335 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 70.5ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:05:15,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9291 states. [2021-08-21 12:05:15,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9291 to 8710. [2021-08-21 12:05:15,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8710 states, 8709 states have (on average 2.9927661040303133) internal successors, (26064), 8709 states have internal predecessors, (26064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:15,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8710 states to 8710 states and 26064 transitions. [2021-08-21 12:05:15,469 INFO L78 Accepts]: Start accepts. Automaton has 8710 states and 26064 transitions. Word has length 22 [2021-08-21 12:05:15,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:15,470 INFO L470 AbstractCegarLoop]: Abstraction has 8710 states and 26064 transitions. [2021-08-21 12:05:15,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:15,470 INFO L276 IsEmpty]: Start isEmpty. Operand 8710 states and 26064 transitions. [2021-08-21 12:05:15,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:15,479 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:15,479 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:15,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:15,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:15,694 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:15,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:15,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1914103269, now seen corresponding path program 248 times [2021-08-21 12:05:15,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:15,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061731585] [2021-08-21 12:05:15,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:15,695 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:15,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:15,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:15,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061731585] [2021-08-21 12:05:15,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061731585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:15,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220530210] [2021-08-21 12:05:15,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:05:15,800 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:15,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:15,800 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:15,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2021-08-21 12:05:17,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:05:17,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:17,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:17,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:17,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220530210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:17,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:17,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:05:17,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123215050] [2021-08-21 12:05:17,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:05:17,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:17,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:05:17,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:05:17,525 INFO L87 Difference]: Start difference. First operand 8710 states and 26064 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:17,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:17,677 INFO L93 Difference]: Finished difference Result 9910 states and 29068 transitions. [2021-08-21 12:05:17,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:05:17,678 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:17,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:17,695 INFO L225 Difference]: With dead ends: 9910 [2021-08-21 12:05:17,696 INFO L226 Difference]: Without dead ends: 9910 [2021-08-21 12:05:17,696 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 128.2ms TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:05:17,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9910 states. [2021-08-21 12:05:17,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9910 to 6098. [2021-08-21 12:05:17,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6098 states, 6097 states have (on average 2.928161390847958) internal successors, (17853), 6097 states have internal predecessors, (17853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:17,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6098 states to 6098 states and 17853 transitions. [2021-08-21 12:05:17,829 INFO L78 Accepts]: Start accepts. Automaton has 6098 states and 17853 transitions. Word has length 22 [2021-08-21 12:05:17,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:17,830 INFO L470 AbstractCegarLoop]: Abstraction has 6098 states and 17853 transitions. [2021-08-21 12:05:17,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:17,830 INFO L276 IsEmpty]: Start isEmpty. Operand 6098 states and 17853 transitions. [2021-08-21 12:05:17,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:17,837 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:17,837 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:17,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Ended with exit code 0 [2021-08-21 12:05:18,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:18,040 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:18,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:18,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1937964887, now seen corresponding path program 249 times [2021-08-21 12:05:18,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:18,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050491583] [2021-08-21 12:05:18,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:18,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:18,129 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:18,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:18,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050491583] [2021-08-21 12:05:18,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050491583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:18,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201878311] [2021-08-21 12:05:18,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:05:18,130 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:18,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:18,130 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:18,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2021-08-21 12:05:19,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:05:19,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:19,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:19,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:19,854 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:19,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201878311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:19,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:19,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:05:19,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979257131] [2021-08-21 12:05:19,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:05:19,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:19,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:05:19,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:05:19,855 INFO L87 Difference]: Start difference. First operand 6098 states and 17853 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:20,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:20,104 INFO L93 Difference]: Finished difference Result 8421 states and 23889 transitions. [2021-08-21 12:05:20,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:05:20,105 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:20,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:20,118 INFO L225 Difference]: With dead ends: 8421 [2021-08-21 12:05:20,118 INFO L226 Difference]: Without dead ends: 8421 [2021-08-21 12:05:20,119 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 193.5ms TimeCoverageRelationStatistics Valid=362, Invalid=694, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:05:20,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8421 states. [2021-08-21 12:05:20,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8421 to 4659. [2021-08-21 12:05:20,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 2.921854873336196) internal successors, (13610), 4658 states have internal predecessors, (13610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:20,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 13610 transitions. [2021-08-21 12:05:20,212 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 13610 transitions. Word has length 22 [2021-08-21 12:05:20,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:20,213 INFO L470 AbstractCegarLoop]: Abstraction has 4659 states and 13610 transitions. [2021-08-21 12:05:20,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:20,213 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 13610 transitions. [2021-08-21 12:05:20,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:20,218 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:20,218 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:20,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:20,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:20,433 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:20,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:20,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1669218459, now seen corresponding path program 250 times [2021-08-21 12:05:20,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:20,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404203888] [2021-08-21 12:05:20,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:20,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:20,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:20,522 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:20,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:20,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404203888] [2021-08-21 12:05:20,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404203888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:20,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646724668] [2021-08-21 12:05:20,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:05:20,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:20,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:20,523 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:20,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2021-08-21 12:05:22,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:05:22,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:22,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:22,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:22,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646724668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:22,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:22,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:05:22,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293874292] [2021-08-21 12:05:22,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:05:22,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:22,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:05:22,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:05:22,254 INFO L87 Difference]: Start difference. First operand 4659 states and 13610 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:22,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:22,514 INFO L93 Difference]: Finished difference Result 7464 states and 21256 transitions. [2021-08-21 12:05:22,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:05:22,515 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:22,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:22,528 INFO L225 Difference]: With dead ends: 7464 [2021-08-21 12:05:22,528 INFO L226 Difference]: Without dead ends: 7464 [2021-08-21 12:05:22,529 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 212.9ms TimeCoverageRelationStatistics Valid=319, Invalid=611, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:05:22,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7464 states. [2021-08-21 12:05:22,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7464 to 6572. [2021-08-21 12:05:22,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6572 states, 6571 states have (on average 2.943539796073657) internal successors, (19342), 6571 states have internal predecessors, (19342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:22,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6572 states to 6572 states and 19342 transitions. [2021-08-21 12:05:22,654 INFO L78 Accepts]: Start accepts. Automaton has 6572 states and 19342 transitions. Word has length 22 [2021-08-21 12:05:22,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:22,654 INFO L470 AbstractCegarLoop]: Abstraction has 6572 states and 19342 transitions. [2021-08-21 12:05:22,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:22,654 INFO L276 IsEmpty]: Start isEmpty. Operand 6572 states and 19342 transitions. [2021-08-21 12:05:22,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:22,662 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:22,662 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:22,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:22,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:22,883 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:22,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:22,883 INFO L82 PathProgramCache]: Analyzing trace with hash 185125557, now seen corresponding path program 251 times [2021-08-21 12:05:22,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:22,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709829269] [2021-08-21 12:05:22,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:22,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:22,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:22,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:22,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709829269] [2021-08-21 12:05:22,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709829269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:22,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505051544] [2021-08-21 12:05:22,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:05:22,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:22,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:22,950 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:22,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2021-08-21 12:05:24,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:05:24,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:24,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:24,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:24,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505051544] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:24,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:24,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:05:24,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750331151] [2021-08-21 12:05:24,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:05:24,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:24,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:05:24,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:05:24,651 INFO L87 Difference]: Start difference. First operand 6572 states and 19342 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:24,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:24,852 INFO L93 Difference]: Finished difference Result 6844 states and 19712 transitions. [2021-08-21 12:05:24,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:05:24,853 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:24,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:24,863 INFO L225 Difference]: With dead ends: 6844 [2021-08-21 12:05:24,864 INFO L226 Difference]: Without dead ends: 6840 [2021-08-21 12:05:24,864 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:05:24,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6840 states. [2021-08-21 12:05:24,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6840 to 6541. [2021-08-21 12:05:24,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6541 states, 6540 states have (on average 2.9397553516819572) internal successors, (19226), 6540 states have internal predecessors, (19226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:24,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6541 states to 6541 states and 19226 transitions. [2021-08-21 12:05:24,983 INFO L78 Accepts]: Start accepts. Automaton has 6541 states and 19226 transitions. Word has length 22 [2021-08-21 12:05:24,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:24,983 INFO L470 AbstractCegarLoop]: Abstraction has 6541 states and 19226 transitions. [2021-08-21 12:05:24,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:24,984 INFO L276 IsEmpty]: Start isEmpty. Operand 6541 states and 19226 transitions. [2021-08-21 12:05:24,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:24,991 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:24,991 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:25,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Ended with exit code 0 [2021-08-21 12:05:25,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:25,197 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:25,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:25,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1533218149, now seen corresponding path program 252 times [2021-08-21 12:05:25,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:25,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496683629] [2021-08-21 12:05:25,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:25,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:25,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:25,264 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:25,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:25,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496683629] [2021-08-21 12:05:25,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496683629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:25,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402028037] [2021-08-21 12:05:25,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:05:25,265 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:25,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:25,267 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:25,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2021-08-21 12:05:26,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:05:26,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:26,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:26,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:26,944 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:26,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402028037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:26,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:26,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:05:26,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397119598] [2021-08-21 12:05:26,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:05:26,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:26,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:05:26,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:05:26,945 INFO L87 Difference]: Start difference. First operand 6541 states and 19226 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:27,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:27,040 INFO L93 Difference]: Finished difference Result 7364 states and 21052 transitions. [2021-08-21 12:05:27,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:05:27,041 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:27,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:27,052 INFO L225 Difference]: With dead ends: 7364 [2021-08-21 12:05:27,052 INFO L226 Difference]: Without dead ends: 7364 [2021-08-21 12:05:27,052 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:05:27,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7364 states. [2021-08-21 12:05:27,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7364 to 6548. [2021-08-21 12:05:27,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6548 states, 6547 states have (on average 2.9392087979227126) internal successors, (19243), 6547 states have internal predecessors, (19243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:27,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6548 states to 6548 states and 19243 transitions. [2021-08-21 12:05:27,212 INFO L78 Accepts]: Start accepts. Automaton has 6548 states and 19243 transitions. Word has length 22 [2021-08-21 12:05:27,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:27,212 INFO L470 AbstractCegarLoop]: Abstraction has 6548 states and 19243 transitions. [2021-08-21 12:05:27,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:27,212 INFO L276 IsEmpty]: Start isEmpty. Operand 6548 states and 19243 transitions. [2021-08-21 12:05:27,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:27,218 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:27,219 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:27,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:27,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-08-21 12:05:27,422 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:27,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:27,422 INFO L82 PathProgramCache]: Analyzing trace with hash 177395159, now seen corresponding path program 253 times [2021-08-21 12:05:27,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:27,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517611839] [2021-08-21 12:05:27,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:27,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:27,500 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:27,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:27,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517611839] [2021-08-21 12:05:27,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517611839] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:27,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818566104] [2021-08-21 12:05:27,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:05:27,500 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:27,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:27,501 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:27,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2021-08-21 12:05:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:29,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:29,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:29,192 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:29,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818566104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:29,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:29,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 12:05:29,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946286319] [2021-08-21 12:05:29,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:05:29,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:29,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:05:29,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:05:29,193 INFO L87 Difference]: Start difference. First operand 6548 states and 19243 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:29,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:29,321 INFO L93 Difference]: Finished difference Result 7699 states and 21978 transitions. [2021-08-21 12:05:29,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:05:29,321 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:29,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:29,331 INFO L225 Difference]: With dead ends: 7699 [2021-08-21 12:05:29,331 INFO L226 Difference]: Without dead ends: 7699 [2021-08-21 12:05:29,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:05:29,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7699 states. [2021-08-21 12:05:29,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7699 to 6323. [2021-08-21 12:05:29,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6323 states, 6322 states have (on average 2.9307181271749445) internal successors, (18528), 6322 states have internal predecessors, (18528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:29,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6323 states to 6323 states and 18528 transitions. [2021-08-21 12:05:29,505 INFO L78 Accepts]: Start accepts. Automaton has 6323 states and 18528 transitions. Word has length 22 [2021-08-21 12:05:29,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:29,505 INFO L470 AbstractCegarLoop]: Abstraction has 6323 states and 18528 transitions. [2021-08-21 12:05:29,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:29,505 INFO L276 IsEmpty]: Start isEmpty. Operand 6323 states and 18528 transitions. [2021-08-21 12:05:29,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:29,512 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:29,512 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:29,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:29,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-08-21 12:05:29,733 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:29,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:29,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1666800155, now seen corresponding path program 254 times [2021-08-21 12:05:29,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:29,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334949456] [2021-08-21 12:05:29,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:29,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:29,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:29,805 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:29,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:29,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334949456] [2021-08-21 12:05:29,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334949456] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:29,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583052708] [2021-08-21 12:05:29,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:05:29,805 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:29,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:29,806 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:29,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2021-08-21 12:05:31,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:05:31,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:31,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:31,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:31,509 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:31,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583052708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:31,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:31,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 12:05:31,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147210264] [2021-08-21 12:05:31,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:05:31,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:31,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:05:31,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:05:31,510 INFO L87 Difference]: Start difference. First operand 6323 states and 18528 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:31,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:31,649 INFO L93 Difference]: Finished difference Result 8817 states and 25381 transitions. [2021-08-21 12:05:31,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:05:31,650 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:31,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:31,665 INFO L225 Difference]: With dead ends: 8817 [2021-08-21 12:05:31,665 INFO L226 Difference]: Without dead ends: 8817 [2021-08-21 12:05:31,665 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 102.0ms TimeCoverageRelationStatistics Valid=183, Invalid=323, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:05:31,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8817 states. [2021-08-21 12:05:31,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8817 to 7897. [2021-08-21 12:05:31,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7897 states, 7896 states have (on average 2.975683890577508) internal successors, (23496), 7896 states have internal predecessors, (23496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:31,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7897 states to 7897 states and 23496 transitions. [2021-08-21 12:05:31,844 INFO L78 Accepts]: Start accepts. Automaton has 7897 states and 23496 transitions. Word has length 22 [2021-08-21 12:05:31,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:31,845 INFO L470 AbstractCegarLoop]: Abstraction has 7897 states and 23496 transitions. [2021-08-21 12:05:31,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:31,845 INFO L276 IsEmpty]: Start isEmpty. Operand 7897 states and 23496 transitions. [2021-08-21 12:05:31,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:31,854 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:31,854 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:31,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Ended with exit code 0 [2021-08-21 12:05:32,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-08-21 12:05:32,064 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:32,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:32,065 INFO L82 PathProgramCache]: Analyzing trace with hash 593714775, now seen corresponding path program 255 times [2021-08-21 12:05:32,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:32,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49935203] [2021-08-21 12:05:32,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:32,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:32,158 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:32,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:32,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49935203] [2021-08-21 12:05:32,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49935203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:32,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210896560] [2021-08-21 12:05:32,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:05:32,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:32,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:32,159 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:32,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2021-08-21 12:05:33,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:05:33,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:33,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:33,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:33,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210896560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:33,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:33,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:05:33,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498061849] [2021-08-21 12:05:33,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:05:33,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:33,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:05:33,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:05:33,970 INFO L87 Difference]: Start difference. First operand 7897 states and 23496 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:34,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:34,094 INFO L93 Difference]: Finished difference Result 8568 states and 24716 transitions. [2021-08-21 12:05:34,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:05:34,095 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:34,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:34,110 INFO L225 Difference]: With dead ends: 8568 [2021-08-21 12:05:34,110 INFO L226 Difference]: Without dead ends: 8568 [2021-08-21 12:05:34,111 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:05:34,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8568 states. [2021-08-21 12:05:34,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8568 to 7213. [2021-08-21 12:05:34,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7213 states, 7212 states have (on average 2.9668607875762616) internal successors, (21397), 7212 states have internal predecessors, (21397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:34,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7213 states to 7213 states and 21397 transitions. [2021-08-21 12:05:34,255 INFO L78 Accepts]: Start accepts. Automaton has 7213 states and 21397 transitions. Word has length 22 [2021-08-21 12:05:34,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:34,255 INFO L470 AbstractCegarLoop]: Abstraction has 7213 states and 21397 transitions. [2021-08-21 12:05:34,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:34,256 INFO L276 IsEmpty]: Start isEmpty. Operand 7213 states and 21397 transitions. [2021-08-21 12:05:34,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:34,264 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:34,264 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:34,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:34,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:34,488 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:34,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:34,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1687806363, now seen corresponding path program 256 times [2021-08-21 12:05:34,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:34,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872241846] [2021-08-21 12:05:34,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:34,488 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:34,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:34,568 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:34,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:34,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872241846] [2021-08-21 12:05:34,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872241846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:34,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068869728] [2021-08-21 12:05:34,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:05:34,568 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:34,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:34,569 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:34,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2021-08-21 12:05:36,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:05:36,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:36,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:36,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:36,457 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:36,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068869728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:36,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:36,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:05:36,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404518129] [2021-08-21 12:05:36,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:05:36,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:36,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:05:36,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:05:36,458 INFO L87 Difference]: Start difference. First operand 7213 states and 21397 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:36,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:36,594 INFO L93 Difference]: Finished difference Result 10361 states and 30394 transitions. [2021-08-21 12:05:36,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:05:36,594 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:36,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:36,615 INFO L225 Difference]: With dead ends: 10361 [2021-08-21 12:05:36,615 INFO L226 Difference]: Without dead ends: 10361 [2021-08-21 12:05:36,616 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:05:36,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10361 states. [2021-08-21 12:05:36,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10361 to 9990. [2021-08-21 12:05:36,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9990 states, 9989 states have (on average 2.9881870057062767) internal successors, (29849), 9989 states have internal predecessors, (29849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:36,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9990 states to 9990 states and 29849 transitions. [2021-08-21 12:05:36,798 INFO L78 Accepts]: Start accepts. Automaton has 9990 states and 29849 transitions. Word has length 22 [2021-08-21 12:05:36,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:36,798 INFO L470 AbstractCegarLoop]: Abstraction has 9990 states and 29849 transitions. [2021-08-21 12:05:36,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:36,798 INFO L276 IsEmpty]: Start isEmpty. Operand 9990 states and 29849 transitions. [2021-08-21 12:05:36,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:36,809 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:36,809 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:36,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Ended with exit code 0 [2021-08-21 12:05:37,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:37,031 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:37,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:37,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1244907223, now seen corresponding path program 257 times [2021-08-21 12:05:37,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:37,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884075739] [2021-08-21 12:05:37,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:37,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:37,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:37,127 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:37,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:37,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884075739] [2021-08-21 12:05:37,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884075739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:37,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707635841] [2021-08-21 12:05:37,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:05:37,128 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:37,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:37,129 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:37,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2021-08-21 12:05:38,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:05:38,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:38,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:38,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:38,947 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:38,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707635841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:38,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:38,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:05:38,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880844800] [2021-08-21 12:05:38,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:05:38,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:38,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:05:38,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:05:38,948 INFO L87 Difference]: Start difference. First operand 9990 states and 29849 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:39,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:39,144 INFO L93 Difference]: Finished difference Result 10506 states and 30759 transitions. [2021-08-21 12:05:39,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:05:39,145 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:39,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:39,163 INFO L225 Difference]: With dead ends: 10506 [2021-08-21 12:05:39,164 INFO L226 Difference]: Without dead ends: 10506 [2021-08-21 12:05:39,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 152.1ms TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:05:39,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10506 states. [2021-08-21 12:05:39,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10506 to 9811. [2021-08-21 12:05:39,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9811 states, 9810 states have (on average 2.9879714576962284) internal successors, (29312), 9810 states have internal predecessors, (29312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:39,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9811 states to 9811 states and 29312 transitions. [2021-08-21 12:05:39,350 INFO L78 Accepts]: Start accepts. Automaton has 9811 states and 29312 transitions. Word has length 22 [2021-08-21 12:05:39,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:39,350 INFO L470 AbstractCegarLoop]: Abstraction has 9811 states and 29312 transitions. [2021-08-21 12:05:39,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:39,350 INFO L276 IsEmpty]: Start isEmpty. Operand 9811 states and 29312 transitions. [2021-08-21 12:05:39,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:39,361 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:39,361 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:39,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:39,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-08-21 12:05:39,581 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:39,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:39,581 INFO L82 PathProgramCache]: Analyzing trace with hash 399935771, now seen corresponding path program 258 times [2021-08-21 12:05:39,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:39,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17949887] [2021-08-21 12:05:39,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:39,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:39,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:39,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17949887] [2021-08-21 12:05:39,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17949887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:39,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876517572] [2021-08-21 12:05:39,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:05:39,678 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:39,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:39,679 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:39,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2021-08-21 12:05:41,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:05:41,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:41,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:41,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:41,470 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:41,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876517572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:41,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:41,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:05:41,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642294210] [2021-08-21 12:05:41,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:05:41,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:41,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:05:41,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:05:41,471 INFO L87 Difference]: Start difference. First operand 9811 states and 29312 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:41,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:41,789 INFO L93 Difference]: Finished difference Result 11880 states and 34859 transitions. [2021-08-21 12:05:41,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:05:41,789 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:41,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:41,811 INFO L225 Difference]: With dead ends: 11880 [2021-08-21 12:05:41,811 INFO L226 Difference]: Without dead ends: 11880 [2021-08-21 12:05:41,811 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 244.7ms TimeCoverageRelationStatistics Valid=448, Invalid=884, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:05:41,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11880 states. [2021-08-21 12:05:41,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11880 to 11122. [2021-08-21 12:05:41,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11122 states, 11121 states have (on average 2.9922668824745977) internal successors, (33277), 11121 states have internal predecessors, (33277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:42,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11122 states to 11122 states and 33277 transitions. [2021-08-21 12:05:42,008 INFO L78 Accepts]: Start accepts. Automaton has 11122 states and 33277 transitions. Word has length 22 [2021-08-21 12:05:42,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:42,008 INFO L470 AbstractCegarLoop]: Abstraction has 11122 states and 33277 transitions. [2021-08-21 12:05:42,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:42,008 INFO L276 IsEmpty]: Start isEmpty. Operand 11122 states and 33277 transitions. [2021-08-21 12:05:42,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:42,019 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:42,019 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:42,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Ended with exit code 0 [2021-08-21 12:05:42,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:42,233 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:42,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:42,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1853217373, now seen corresponding path program 259 times [2021-08-21 12:05:42,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:42,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245788375] [2021-08-21 12:05:42,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:42,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:42,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:42,319 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:42,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:42,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245788375] [2021-08-21 12:05:42,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245788375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:42,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2198384] [2021-08-21 12:05:42,319 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:05:42,319 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:42,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:42,320 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:42,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2021-08-21 12:05:44,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:44,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:44,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:44,129 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:44,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2198384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:44,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:44,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:05:44,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813716836] [2021-08-21 12:05:44,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:05:44,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:44,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:05:44,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:05:44,130 INFO L87 Difference]: Start difference. First operand 11122 states and 33277 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:44,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:44,364 INFO L93 Difference]: Finished difference Result 11508 states and 33884 transitions. [2021-08-21 12:05:44,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:05:44,365 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:44,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:44,385 INFO L225 Difference]: With dead ends: 11508 [2021-08-21 12:05:44,385 INFO L226 Difference]: Without dead ends: 11500 [2021-08-21 12:05:44,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 161.4ms TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:05:44,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11500 states. [2021-08-21 12:05:44,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11500 to 11166. [2021-08-21 12:05:44,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11166 states, 11165 states have (on average 2.992924317062248) internal successors, (33416), 11165 states have internal predecessors, (33416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:44,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11166 states to 11166 states and 33416 transitions. [2021-08-21 12:05:44,582 INFO L78 Accepts]: Start accepts. Automaton has 11166 states and 33416 transitions. Word has length 22 [2021-08-21 12:05:44,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:44,582 INFO L470 AbstractCegarLoop]: Abstraction has 11166 states and 33416 transitions. [2021-08-21 12:05:44,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:44,582 INFO L276 IsEmpty]: Start isEmpty. Operand 11166 states and 33416 transitions. [2021-08-21 12:05:44,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:44,594 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:44,594 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:44,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Ended with exit code 0 [2021-08-21 12:05:44,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:44,796 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:44,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:44,796 INFO L82 PathProgramCache]: Analyzing trace with hash -2115942749, now seen corresponding path program 260 times [2021-08-21 12:05:44,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:44,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493552312] [2021-08-21 12:05:44,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:44,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:44,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:44,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:44,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493552312] [2021-08-21 12:05:44,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493552312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:44,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063899642] [2021-08-21 12:05:44,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:05:44,889 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:44,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:44,890 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:44,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2021-08-21 12:05:46,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:05:46,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:46,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:46,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:46,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063899642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:46,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:46,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:05:46,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072408545] [2021-08-21 12:05:46,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:05:46,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:46,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:05:46,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:05:46,731 INFO L87 Difference]: Start difference. First operand 11166 states and 33416 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:46,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:46,976 INFO L93 Difference]: Finished difference Result 14315 states and 42387 transitions. [2021-08-21 12:05:46,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:05:46,976 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:46,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:47,004 INFO L225 Difference]: With dead ends: 14315 [2021-08-21 12:05:47,004 INFO L226 Difference]: Without dead ends: 14315 [2021-08-21 12:05:47,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 177.8ms TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:05:47,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14315 states. [2021-08-21 12:05:47,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14315 to 8585. [2021-08-21 12:05:47,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8585 states, 8584 states have (on average 2.9694780987884437) internal successors, (25490), 8584 states have internal predecessors, (25490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:47,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8585 states to 8585 states and 25490 transitions. [2021-08-21 12:05:47,213 INFO L78 Accepts]: Start accepts. Automaton has 8585 states and 25490 transitions. Word has length 22 [2021-08-21 12:05:47,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:47,213 INFO L470 AbstractCegarLoop]: Abstraction has 8585 states and 25490 transitions. [2021-08-21 12:05:47,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:47,214 INFO L276 IsEmpty]: Start isEmpty. Operand 8585 states and 25490 transitions. [2021-08-21 12:05:47,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:47,223 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:47,224 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:47,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Ended with exit code 0 [2021-08-21 12:05:47,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:47,427 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:47,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:47,427 INFO L82 PathProgramCache]: Analyzing trace with hash -2118361053, now seen corresponding path program 261 times [2021-08-21 12:05:47,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:47,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758805035] [2021-08-21 12:05:47,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:47,427 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:47,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:47,500 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:47,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:47,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758805035] [2021-08-21 12:05:47,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758805035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:47,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355116258] [2021-08-21 12:05:47,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:05:47,500 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:47,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:47,501 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:47,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2021-08-21 12:05:49,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:05:49,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:49,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:49,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:49,311 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:49,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355116258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:49,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:49,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 12:05:49,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189743325] [2021-08-21 12:05:49,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:05:49,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:49,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:05:49,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:05:49,312 INFO L87 Difference]: Start difference. First operand 8585 states and 25490 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:49,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:49,459 INFO L93 Difference]: Finished difference Result 9584 states and 27876 transitions. [2021-08-21 12:05:49,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:05:49,459 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:49,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:49,476 INFO L225 Difference]: With dead ends: 9584 [2021-08-21 12:05:49,476 INFO L226 Difference]: Without dead ends: 9584 [2021-08-21 12:05:49,476 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 103.4ms TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:05:49,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9584 states. [2021-08-21 12:05:49,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9584 to 8677. [2021-08-21 12:05:49,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8677 states, 8676 states have (on average 2.9684186260949748) internal successors, (25754), 8676 states have internal predecessors, (25754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:49,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8677 states to 8677 states and 25754 transitions. [2021-08-21 12:05:49,638 INFO L78 Accepts]: Start accepts. Automaton has 8677 states and 25754 transitions. Word has length 22 [2021-08-21 12:05:49,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:49,638 INFO L470 AbstractCegarLoop]: Abstraction has 8677 states and 25754 transitions. [2021-08-21 12:05:49,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:49,638 INFO L276 IsEmpty]: Start isEmpty. Operand 8677 states and 25754 transitions. [2021-08-21 12:05:49,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:49,647 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:49,647 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:49,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:49,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:49,855 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:49,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:49,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1103520863, now seen corresponding path program 262 times [2021-08-21 12:05:49,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:49,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314559267] [2021-08-21 12:05:49,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:49,856 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:49,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:49,941 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:49,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:49,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314559267] [2021-08-21 12:05:49,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314559267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:49,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978338641] [2021-08-21 12:05:49,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:05:49,941 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:49,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:49,942 INFO L229 MonitoredProcess]: Starting monitored process 264 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:49,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2021-08-21 12:05:51,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:05:51,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:51,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:51,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:51,711 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:51,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978338641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:51,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:51,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:05:51,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170325308] [2021-08-21 12:05:51,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:05:51,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:51,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:05:51,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:05:51,712 INFO L87 Difference]: Start difference. First operand 8677 states and 25754 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:51,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:51,867 INFO L93 Difference]: Finished difference Result 9373 states and 27299 transitions. [2021-08-21 12:05:51,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:05:51,868 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:51,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:51,885 INFO L225 Difference]: With dead ends: 9373 [2021-08-21 12:05:51,885 INFO L226 Difference]: Without dead ends: 9373 [2021-08-21 12:05:51,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 112.2ms TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:05:51,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9373 states. [2021-08-21 12:05:52,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9373 to 6805. [2021-08-21 12:05:52,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6805 states, 6804 states have (on average 2.9523809523809526) internal successors, (20088), 6804 states have internal predecessors, (20088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:52,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6805 states to 6805 states and 20088 transitions. [2021-08-21 12:05:52,091 INFO L78 Accepts]: Start accepts. Automaton has 6805 states and 20088 transitions. Word has length 22 [2021-08-21 12:05:52,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:52,091 INFO L470 AbstractCegarLoop]: Abstraction has 6805 states and 20088 transitions. [2021-08-21 12:05:52,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:52,091 INFO L276 IsEmpty]: Start isEmpty. Operand 6805 states and 20088 transitions. [2021-08-21 12:05:52,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:52,098 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:52,098 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:52,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:52,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-08-21 12:05:52,318 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:52,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:52,318 INFO L82 PathProgramCache]: Analyzing trace with hash -2097354845, now seen corresponding path program 263 times [2021-08-21 12:05:52,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:52,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516660027] [2021-08-21 12:05:52,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:52,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:52,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:52,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516660027] [2021-08-21 12:05:52,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516660027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:52,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696974973] [2021-08-21 12:05:52,401 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:05:52,401 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:52,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:52,402 INFO L229 MonitoredProcess]: Starting monitored process 265 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:52,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2021-08-21 12:05:54,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:05:54,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:54,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:54,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:54,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696974973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:54,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:54,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:05:54,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154197354] [2021-08-21 12:05:54,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:05:54,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:54,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:05:54,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:05:54,241 INFO L87 Difference]: Start difference. First operand 6805 states and 20088 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:54,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:54,350 INFO L93 Difference]: Finished difference Result 8342 states and 24092 transitions. [2021-08-21 12:05:54,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:05:54,350 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:54,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:54,363 INFO L225 Difference]: With dead ends: 8342 [2021-08-21 12:05:54,364 INFO L226 Difference]: Without dead ends: 8342 [2021-08-21 12:05:54,364 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:05:54,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8342 states. [2021-08-21 12:05:54,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8342 to 7719. [2021-08-21 12:05:54,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7719 states, 7718 states have (on average 2.9510235812386627) internal successors, (22776), 7718 states have internal predecessors, (22776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:54,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7719 states to 7719 states and 22776 transitions. [2021-08-21 12:05:54,494 INFO L78 Accepts]: Start accepts. Automaton has 7719 states and 22776 transitions. Word has length 22 [2021-08-21 12:05:54,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:54,494 INFO L470 AbstractCegarLoop]: Abstraction has 7719 states and 22776 transitions. [2021-08-21 12:05:54,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:54,494 INFO L276 IsEmpty]: Start isEmpty. Operand 7719 states and 22776 transitions. [2021-08-21 12:05:54,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:54,502 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:54,503 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:54,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:54,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-08-21 12:05:54,711 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:54,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:54,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1754713311, now seen corresponding path program 264 times [2021-08-21 12:05:54,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:54,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579755539] [2021-08-21 12:05:54,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:54,712 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:54,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:54,804 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:54,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:54,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579755539] [2021-08-21 12:05:54,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579755539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:54,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348795652] [2021-08-21 12:05:54,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:05:54,805 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:54,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:54,805 INFO L229 MonitoredProcess]: Starting monitored process 266 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:54,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2021-08-21 12:05:56,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:05:56,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:56,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:56,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:56,694 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:56,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348795652] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:56,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:56,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:05:56,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079220554] [2021-08-21 12:05:56,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:05:56,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:56,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:05:56,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:05:56,695 INFO L87 Difference]: Start difference. First operand 7719 states and 22776 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:56,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:56,882 INFO L93 Difference]: Finished difference Result 8525 states and 24517 transitions. [2021-08-21 12:05:56,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:05:56,882 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:56,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:56,897 INFO L225 Difference]: With dead ends: 8525 [2021-08-21 12:05:56,897 INFO L226 Difference]: Without dead ends: 8525 [2021-08-21 12:05:56,897 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 151.0ms TimeCoverageRelationStatistics Valid=249, Invalid=507, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:05:56,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8525 states. [2021-08-21 12:05:57,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8525 to 7090. [2021-08-21 12:05:57,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7090 states, 7089 states have (on average 2.9439977429820847) internal successors, (20870), 7089 states have internal predecessors, (20870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:57,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7090 states to 7090 states and 20870 transitions. [2021-08-21 12:05:57,026 INFO L78 Accepts]: Start accepts. Automaton has 7090 states and 20870 transitions. Word has length 22 [2021-08-21 12:05:57,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:57,026 INFO L470 AbstractCegarLoop]: Abstraction has 7090 states and 20870 transitions. [2021-08-21 12:05:57,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:57,026 INFO L276 IsEmpty]: Start isEmpty. Operand 7090 states and 20870 transitions. [2021-08-21 12:05:57,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:57,033 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:57,033 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:57,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:57,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-08-21 12:05:57,251 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:57,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:57,252 INFO L82 PathProgramCache]: Analyzing trace with hash 909741859, now seen corresponding path program 265 times [2021-08-21 12:05:57,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:57,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209150799] [2021-08-21 12:05:57,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:57,252 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:57,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:57,360 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:57,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:57,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209150799] [2021-08-21 12:05:57,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209150799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:57,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633706779] [2021-08-21 12:05:57,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:05:57,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:57,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:57,361 INFO L229 MonitoredProcess]: Starting monitored process 267 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:57,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2021-08-21 12:05:59,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:59,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:59,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:59,193 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:59,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633706779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:59,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:59,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:05:59,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516055263] [2021-08-21 12:05:59,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:05:59,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:59,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:05:59,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:05:59,194 INFO L87 Difference]: Start difference. First operand 7090 states and 20870 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:59,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:59,491 INFO L93 Difference]: Finished difference Result 8560 states and 24443 transitions. [2021-08-21 12:05:59,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:05:59,492 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:59,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:59,506 INFO L225 Difference]: With dead ends: 8560 [2021-08-21 12:05:59,507 INFO L226 Difference]: Without dead ends: 8560 [2021-08-21 12:05:59,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 250.0ms TimeCoverageRelationStatistics Valid=447, Invalid=885, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:05:59,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8560 states. [2021-08-21 12:05:59,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8560 to 6865. [2021-08-21 12:05:59,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6865 states, 6864 states have (on average 2.9599358974358974) internal successors, (20317), 6864 states have internal predecessors, (20317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:59,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6865 states to 6865 states and 20317 transitions. [2021-08-21 12:05:59,628 INFO L78 Accepts]: Start accepts. Automaton has 6865 states and 20317 transitions. Word has length 22 [2021-08-21 12:05:59,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:59,628 INFO L470 AbstractCegarLoop]: Abstraction has 6865 states and 20317 transitions. [2021-08-21 12:05:59,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:59,629 INFO L276 IsEmpty]: Start isEmpty. Operand 6865 states and 20317 transitions. [2021-08-21 12:05:59,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:59,635 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:59,635 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:59,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Ended with exit code 0 [2021-08-21 12:05:59,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-08-21 12:05:59,836 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:59,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:59,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1784284609, now seen corresponding path program 266 times [2021-08-21 12:05:59,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:59,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660482735] [2021-08-21 12:05:59,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:59,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:59,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:59,918 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:59,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:59,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660482735] [2021-08-21 12:05:59,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660482735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:59,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334368747] [2021-08-21 12:05:59,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:05:59,919 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:59,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:59,919 INFO L229 MonitoredProcess]: Starting monitored process 268 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:59,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2021-08-21 12:06:01,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:06:01,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:01,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:01,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:01,770 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:01,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334368747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:01,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:01,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 12:06:01,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324760390] [2021-08-21 12:06:01,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:06:01,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:01,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:06:01,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:06:01,771 INFO L87 Difference]: Start difference. First operand 6865 states and 20317 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:01,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:01,977 INFO L93 Difference]: Finished difference Result 7144 states and 20679 transitions. [2021-08-21 12:06:01,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:06:01,977 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:01,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:01,989 INFO L225 Difference]: With dead ends: 7144 [2021-08-21 12:06:01,990 INFO L226 Difference]: Without dead ends: 7138 [2021-08-21 12:06:01,990 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 141.3ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:06:01,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7138 states. [2021-08-21 12:06:02,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7138 to 6665. [2021-08-21 12:06:02,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6665 states, 6664 states have (on average 2.948529411764706) internal successors, (19649), 6664 states have internal predecessors, (19649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:02,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6665 states to 6665 states and 19649 transitions. [2021-08-21 12:06:02,120 INFO L78 Accepts]: Start accepts. Automaton has 6665 states and 19649 transitions. Word has length 22 [2021-08-21 12:06:02,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:02,120 INFO L470 AbstractCegarLoop]: Abstraction has 6665 states and 19649 transitions. [2021-08-21 12:06:02,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:02,120 INFO L276 IsEmpty]: Start isEmpty. Operand 6665 states and 19649 transitions. [2021-08-21 12:06:02,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:02,127 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:02,127 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:02,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:02,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-08-21 12:06:02,348 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:02,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:02,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1630332903, now seen corresponding path program 267 times [2021-08-21 12:06:02,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:02,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093588956] [2021-08-21 12:06:02,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:02,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:02,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:02,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:02,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093588956] [2021-08-21 12:06:02,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093588956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:02,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704334554] [2021-08-21 12:06:02,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:06:02,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:02,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:02,432 INFO L229 MonitoredProcess]: Starting monitored process 269 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:02,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2021-08-21 12:06:04,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:06:04,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:04,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:04,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:04,322 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:04,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704334554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:04,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:04,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:06:04,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929358609] [2021-08-21 12:06:04,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:06:04,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:04,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:06:04,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:06:04,323 INFO L87 Difference]: Start difference. First operand 6665 states and 19649 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:04,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:04,425 INFO L93 Difference]: Finished difference Result 6838 states and 19804 transitions. [2021-08-21 12:06:04,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:06:04,425 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:04,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:04,435 INFO L225 Difference]: With dead ends: 6838 [2021-08-21 12:06:04,435 INFO L226 Difference]: Without dead ends: 6836 [2021-08-21 12:06:04,435 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:06:04,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6836 states. [2021-08-21 12:06:04,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6836 to 6425. [2021-08-21 12:06:04,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6425 states, 6424 states have (on average 2.9425591531755915) internal successors, (18903), 6424 states have internal predecessors, (18903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:04,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6425 states to 6425 states and 18903 transitions. [2021-08-21 12:06:04,534 INFO L78 Accepts]: Start accepts. Automaton has 6425 states and 18903 transitions. Word has length 22 [2021-08-21 12:06:04,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:04,534 INFO L470 AbstractCegarLoop]: Abstraction has 6425 states and 18903 transitions. [2021-08-21 12:06:04,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:04,534 INFO L276 IsEmpty]: Start isEmpty. Operand 6425 states and 18903 transitions. [2021-08-21 12:06:04,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:04,541 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:04,541 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:04,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:04,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-08-21 12:06:04,757 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:04,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:04,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1187433763, now seen corresponding path program 268 times [2021-08-21 12:06:04,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:04,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274366555] [2021-08-21 12:06:04,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:04,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:04,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:04,848 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:04,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:04,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274366555] [2021-08-21 12:06:04,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274366555] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:04,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405451981] [2021-08-21 12:06:04,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:06:04,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:04,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:04,849 INFO L229 MonitoredProcess]: Starting monitored process 270 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:04,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2021-08-21 12:06:06,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:06:06,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:06,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:06,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:06,700 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:06,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405451981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:06,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:06,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:06:06,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146296855] [2021-08-21 12:06:06,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:06:06,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:06,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:06:06,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:06:06,701 INFO L87 Difference]: Start difference. First operand 6425 states and 18903 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:06,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:06,865 INFO L93 Difference]: Finished difference Result 6885 states and 19888 transitions. [2021-08-21 12:06:06,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:06:06,865 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:06,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:06,877 INFO L225 Difference]: With dead ends: 6885 [2021-08-21 12:06:06,877 INFO L226 Difference]: Without dead ends: 6885 [2021-08-21 12:06:06,877 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 172.2ms TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:06:06,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6885 states. [2021-08-21 12:06:06,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6885 to 5862. [2021-08-21 12:06:06,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5862 states, 5861 states have (on average 2.9322641187510663) internal successors, (17186), 5861 states have internal predecessors, (17186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:06,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5862 states to 5862 states and 17186 transitions. [2021-08-21 12:06:06,975 INFO L78 Accepts]: Start accepts. Automaton has 5862 states and 17186 transitions. Word has length 22 [2021-08-21 12:06:06,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:06,975 INFO L470 AbstractCegarLoop]: Abstraction has 5862 states and 17186 transitions. [2021-08-21 12:06:06,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:06,975 INFO L276 IsEmpty]: Start isEmpty. Operand 5862 states and 17186 transitions. [2021-08-21 12:06:06,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:06,981 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:06,981 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:07,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Ended with exit code 0 [2021-08-21 12:06:07,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2021-08-21 12:06:07,197 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:07,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:07,197 INFO L82 PathProgramCache]: Analyzing trace with hash 342462311, now seen corresponding path program 269 times [2021-08-21 12:06:07,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:07,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974253510] [2021-08-21 12:06:07,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:07,199 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:07,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:07,294 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:07,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:07,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974253510] [2021-08-21 12:06:07,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974253510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:07,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64737407] [2021-08-21 12:06:07,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:06:07,294 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:07,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:07,295 INFO L229 MonitoredProcess]: Starting monitored process 271 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:07,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2021-08-21 12:06:09,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:06:09,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:09,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:09,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:09,155 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:09,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64737407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:09,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:09,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:06:09,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637275030] [2021-08-21 12:06:09,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:06:09,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:09,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:06:09,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:06:09,156 INFO L87 Difference]: Start difference. First operand 5862 states and 17186 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:09,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:09,467 INFO L93 Difference]: Finished difference Result 6885 states and 19555 transitions. [2021-08-21 12:06:09,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:06:09,467 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:09,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:09,478 INFO L225 Difference]: With dead ends: 6885 [2021-08-21 12:06:09,478 INFO L226 Difference]: Without dead ends: 6885 [2021-08-21 12:06:09,478 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 250.8ms TimeCoverageRelationStatistics Valid=478, Invalid=928, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:06:09,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6885 states. [2021-08-21 12:06:09,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6885 to 5700. [2021-08-21 12:06:09,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5700 states, 5699 states have (on average 2.94542902263555) internal successors, (16786), 5699 states have internal predecessors, (16786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:09,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5700 states to 5700 states and 16786 transitions. [2021-08-21 12:06:09,599 INFO L78 Accepts]: Start accepts. Automaton has 5700 states and 16786 transitions. Word has length 22 [2021-08-21 12:06:09,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:09,599 INFO L470 AbstractCegarLoop]: Abstraction has 5700 states and 16786 transitions. [2021-08-21 12:06:09,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:09,599 INFO L276 IsEmpty]: Start isEmpty. Operand 5700 states and 16786 transitions. [2021-08-21 12:06:09,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:09,604 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:09,604 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:09,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Ended with exit code 0 [2021-08-21 12:06:09,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:09,824 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:09,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:09,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1977701917, now seen corresponding path program 270 times [2021-08-21 12:06:09,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:09,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637556593] [2021-08-21 12:06:09,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:09,824 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:09,890 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:09,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:09,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637556593] [2021-08-21 12:06:09,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637556593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:09,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132752674] [2021-08-21 12:06:09,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:06:09,891 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:09,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:09,891 INFO L229 MonitoredProcess]: Starting monitored process 272 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:09,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2021-08-21 12:06:11,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:06:11,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:11,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:11,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:11,686 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:11,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132752674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:11,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:11,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:06:11,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691396557] [2021-08-21 12:06:11,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:06:11,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:11,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:06:11,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:06:11,687 INFO L87 Difference]: Start difference. First operand 5700 states and 16786 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:11,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:11,848 INFO L93 Difference]: Finished difference Result 5891 states and 17011 transitions. [2021-08-21 12:06:11,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:06:11,848 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:11,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:11,856 INFO L225 Difference]: With dead ends: 5891 [2021-08-21 12:06:11,856 INFO L226 Difference]: Without dead ends: 5887 [2021-08-21 12:06:11,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 104.2ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:06:11,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5887 states. [2021-08-21 12:06:11,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5887 to 5693. [2021-08-21 12:06:11,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5693 states, 5692 states have (on average 2.944132115249473) internal successors, (16758), 5692 states have internal predecessors, (16758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:11,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5693 states to 5693 states and 16758 transitions. [2021-08-21 12:06:11,935 INFO L78 Accepts]: Start accepts. Automaton has 5693 states and 16758 transitions. Word has length 22 [2021-08-21 12:06:11,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:11,935 INFO L470 AbstractCegarLoop]: Abstraction has 5693 states and 16758 transitions. [2021-08-21 12:06:11,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:11,936 INFO L276 IsEmpty]: Start isEmpty. Operand 5693 states and 16758 transitions. [2021-08-21 12:06:11,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:11,941 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:11,941 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:11,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:12,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:12,157 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:12,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:12,157 INFO L82 PathProgramCache]: Analyzing trace with hash 601257635, now seen corresponding path program 271 times [2021-08-21 12:06:12,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:12,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952913302] [2021-08-21 12:06:12,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:12,157 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:12,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:12,255 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:12,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:12,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952913302] [2021-08-21 12:06:12,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952913302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:12,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009213670] [2021-08-21 12:06:12,255 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:06:12,255 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:12,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:12,256 INFO L229 MonitoredProcess]: Starting monitored process 273 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:12,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2021-08-21 12:06:14,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:14,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:14,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:14,166 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:14,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009213670] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:14,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:14,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:06:14,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698133876] [2021-08-21 12:06:14,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:06:14,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:14,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:06:14,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:06:14,167 INFO L87 Difference]: Start difference. First operand 5693 states and 16758 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:14,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:14,430 INFO L93 Difference]: Finished difference Result 7244 states and 20675 transitions. [2021-08-21 12:06:14,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:06:14,431 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:14,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:14,443 INFO L225 Difference]: With dead ends: 7244 [2021-08-21 12:06:14,443 INFO L226 Difference]: Without dead ends: 7244 [2021-08-21 12:06:14,443 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 220.1ms TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:06:14,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7244 states. [2021-08-21 12:06:14,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7244 to 6665. [2021-08-21 12:06:14,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6665 states, 6664 states have (on average 2.9426770708283314) internal successors, (19610), 6664 states have internal predecessors, (19610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:14,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6665 states to 6665 states and 19610 transitions. [2021-08-21 12:06:14,562 INFO L78 Accepts]: Start accepts. Automaton has 6665 states and 19610 transitions. Word has length 22 [2021-08-21 12:06:14,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:14,562 INFO L470 AbstractCegarLoop]: Abstraction has 6665 states and 19610 transitions. [2021-08-21 12:06:14,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:14,562 INFO L276 IsEmpty]: Start isEmpty. Operand 6665 states and 19610 transitions. [2021-08-21 12:06:14,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:14,569 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:14,569 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:14,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:14,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable274 [2021-08-21 12:06:14,773 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:14,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:14,773 INFO L82 PathProgramCache]: Analyzing trace with hash 117700993, now seen corresponding path program 272 times [2021-08-21 12:06:14,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:14,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652646969] [2021-08-21 12:06:14,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:14,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:14,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:14,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652646969] [2021-08-21 12:06:14,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652646969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:14,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502938598] [2021-08-21 12:06:14,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:06:14,841 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:14,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:14,842 INFO L229 MonitoredProcess]: Starting monitored process 274 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:14,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2021-08-21 12:06:16,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:06:16,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:16,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:16,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:16,634 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:16,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502938598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:16,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:16,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:06:16,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81626804] [2021-08-21 12:06:16,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:06:16,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:16,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:06:16,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:06:16,635 INFO L87 Difference]: Start difference. First operand 6665 states and 19610 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:16,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:16,830 INFO L93 Difference]: Finished difference Result 6903 states and 19918 transitions. [2021-08-21 12:06:16,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:06:16,830 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:16,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:16,843 INFO L225 Difference]: With dead ends: 6903 [2021-08-21 12:06:16,843 INFO L226 Difference]: Without dead ends: 6899 [2021-08-21 12:06:16,843 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:06:16,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6899 states. [2021-08-21 12:06:16,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6899 to 6679. [2021-08-21 12:06:16,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6679 states, 6678 states have (on average 2.9429469901168015) internal successors, (19653), 6678 states have internal predecessors, (19653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:16,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6679 states to 6679 states and 19653 transitions. [2021-08-21 12:06:16,982 INFO L78 Accepts]: Start accepts. Automaton has 6679 states and 19653 transitions. Word has length 22 [2021-08-21 12:06:16,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:16,982 INFO L470 AbstractCegarLoop]: Abstraction has 6679 states and 19653 transitions. [2021-08-21 12:06:16,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:16,982 INFO L276 IsEmpty]: Start isEmpty. Operand 6679 states and 19653 transitions. [2021-08-21 12:06:16,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:16,989 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:16,989 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:17,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:17,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:17,190 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:17,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:17,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1600642713, now seen corresponding path program 273 times [2021-08-21 12:06:17,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:17,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654093889] [2021-08-21 12:06:17,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:17,191 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:17,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:17,259 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:17,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:17,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654093889] [2021-08-21 12:06:17,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654093889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:17,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536724985] [2021-08-21 12:06:17,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:06:17,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:17,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:17,260 INFO L229 MonitoredProcess]: Starting monitored process 275 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:17,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2021-08-21 12:06:19,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:06:19,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:19,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:19,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:19,165 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:19,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536724985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:19,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:19,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:06:19,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321832296] [2021-08-21 12:06:19,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:06:19,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:19,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:06:19,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:06:19,166 INFO L87 Difference]: Start difference. First operand 6679 states and 19653 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:19,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:19,280 INFO L93 Difference]: Finished difference Result 7216 states and 20744 transitions. [2021-08-21 12:06:19,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:06:19,280 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:19,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:19,293 INFO L225 Difference]: With dead ends: 7216 [2021-08-21 12:06:19,293 INFO L226 Difference]: Without dead ends: 7216 [2021-08-21 12:06:19,293 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=133, Invalid=209, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:06:19,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7216 states. [2021-08-21 12:06:19,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7216 to 6680. [2021-08-21 12:06:19,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6680 states, 6679 states have (on average 2.942506363228028) internal successors, (19653), 6679 states have internal predecessors, (19653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:19,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6680 states to 6680 states and 19653 transitions. [2021-08-21 12:06:19,409 INFO L78 Accepts]: Start accepts. Automaton has 6680 states and 19653 transitions. Word has length 22 [2021-08-21 12:06:19,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:19,409 INFO L470 AbstractCegarLoop]: Abstraction has 6680 states and 19653 transitions. [2021-08-21 12:06:19,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:19,409 INFO L276 IsEmpty]: Start isEmpty. Operand 6680 states and 19653 transitions. [2021-08-21 12:06:19,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:19,416 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:19,416 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:19,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:19,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:19,629 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:19,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:19,629 INFO L82 PathProgramCache]: Analyzing trace with hash 109970595, now seen corresponding path program 274 times [2021-08-21 12:06:19,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:19,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128030795] [2021-08-21 12:06:19,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:19,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:19,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:19,700 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:19,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:19,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128030795] [2021-08-21 12:06:19,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128030795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:19,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651512506] [2021-08-21 12:06:19,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:06:19,701 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:19,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:19,701 INFO L229 MonitoredProcess]: Starting monitored process 276 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:19,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2021-08-21 12:06:21,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:06:21,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:21,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:21,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:21,694 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:21,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651512506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:21,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:21,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 12:06:21,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115975992] [2021-08-21 12:06:21,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:06:21,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:21,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:06:21,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:06:21,695 INFO L87 Difference]: Start difference. First operand 6680 states and 19653 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:21,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:21,824 INFO L93 Difference]: Finished difference Result 7457 states and 21379 transitions. [2021-08-21 12:06:21,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:06:21,824 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:21,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:21,834 INFO L225 Difference]: With dead ends: 7457 [2021-08-21 12:06:21,834 INFO L226 Difference]: Without dead ends: 7457 [2021-08-21 12:06:21,834 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:06:21,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7457 states. [2021-08-21 12:06:21,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7457 to 6680. [2021-08-21 12:06:21,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6680 states, 6679 states have (on average 2.942356640215601) internal successors, (19652), 6679 states have internal predecessors, (19652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:21,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6680 states to 6680 states and 19652 transitions. [2021-08-21 12:06:21,931 INFO L78 Accepts]: Start accepts. Automaton has 6680 states and 19652 transitions. Word has length 22 [2021-08-21 12:06:21,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:21,931 INFO L470 AbstractCegarLoop]: Abstraction has 6680 states and 19652 transitions. [2021-08-21 12:06:21,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:21,931 INFO L276 IsEmpty]: Start isEmpty. Operand 6680 states and 19652 transitions. [2021-08-21 12:06:21,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:21,937 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:21,937 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:21,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Ended with exit code 0 [2021-08-21 12:06:22,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-08-21 12:06:22,149 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:22,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:22,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1599375591, now seen corresponding path program 275 times [2021-08-21 12:06:22,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:22,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055154460] [2021-08-21 12:06:22,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:22,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:22,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:22,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055154460] [2021-08-21 12:06:22,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055154460] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:22,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704686968] [2021-08-21 12:06:22,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:06:22,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:22,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:22,233 INFO L229 MonitoredProcess]: Starting monitored process 277 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:22,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2021-08-21 12:06:23,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:06:23,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:23,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:23,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:24,042 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:24,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704686968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:24,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:24,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 12:06:24,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951353919] [2021-08-21 12:06:24,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:06:24,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:24,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:06:24,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:06:24,042 INFO L87 Difference]: Start difference. First operand 6680 states and 19652 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:24,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:24,265 INFO L93 Difference]: Finished difference Result 7546 states and 21630 transitions. [2021-08-21 12:06:24,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:06:24,265 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:24,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:24,278 INFO L225 Difference]: With dead ends: 7546 [2021-08-21 12:06:24,278 INFO L226 Difference]: Without dead ends: 7546 [2021-08-21 12:06:24,278 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 182.2ms TimeCoverageRelationStatistics Valid=253, Invalid=449, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:06:24,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7546 states. [2021-08-21 12:06:24,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7546 to 6689. [2021-08-21 12:06:24,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6689 states, 6688 states have (on average 2.942434210526316) internal successors, (19679), 6688 states have internal predecessors, (19679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:24,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6689 states to 6689 states and 19679 transitions. [2021-08-21 12:06:24,393 INFO L78 Accepts]: Start accepts. Automaton has 6689 states and 19679 transitions. Word has length 22 [2021-08-21 12:06:24,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:24,393 INFO L470 AbstractCegarLoop]: Abstraction has 6689 states and 19679 transitions. [2021-08-21 12:06:24,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:24,393 INFO L276 IsEmpty]: Start isEmpty. Operand 6689 states and 19679 transitions. [2021-08-21 12:06:24,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:24,400 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:24,400 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:24,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:24,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-08-21 12:06:24,601 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:24,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:24,601 INFO L82 PathProgramCache]: Analyzing trace with hash 526290211, now seen corresponding path program 276 times [2021-08-21 12:06:24,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:24,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688158231] [2021-08-21 12:06:24,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:24,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:24,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:24,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:24,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688158231] [2021-08-21 12:06:24,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688158231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:24,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876103746] [2021-08-21 12:06:24,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:06:24,680 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:24,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:24,680 INFO L229 MonitoredProcess]: Starting monitored process 278 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:24,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2021-08-21 12:06:26,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:06:26,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:26,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:26,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:26,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876103746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:26,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:26,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 12:06:26,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809990426] [2021-08-21 12:06:26,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:06:26,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:26,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:06:26,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:06:26,587 INFO L87 Difference]: Start difference. First operand 6689 states and 19679 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:26,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:26,770 INFO L93 Difference]: Finished difference Result 8336 states and 23924 transitions. [2021-08-21 12:06:26,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:06:26,770 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:26,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:26,786 INFO L225 Difference]: With dead ends: 8336 [2021-08-21 12:06:26,786 INFO L226 Difference]: Without dead ends: 8336 [2021-08-21 12:06:26,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=246, Invalid=456, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:06:26,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8336 states. [2021-08-21 12:06:26,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8336 to 7585. [2021-08-21 12:06:26,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7585 states, 7584 states have (on average 2.9570147679324896) internal successors, (22426), 7584 states have internal predecessors, (22426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:27,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7585 states to 7585 states and 22426 transitions. [2021-08-21 12:06:27,013 INFO L78 Accepts]: Start accepts. Automaton has 7585 states and 22426 transitions. Word has length 22 [2021-08-21 12:06:27,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:27,013 INFO L470 AbstractCegarLoop]: Abstraction has 7585 states and 22426 transitions. [2021-08-21 12:06:27,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:27,013 INFO L276 IsEmpty]: Start isEmpty. Operand 7585 states and 22426 transitions. [2021-08-21 12:06:27,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:27,022 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:27,022 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:27,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:27,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-08-21 12:06:27,238 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:27,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:27,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1620381799, now seen corresponding path program 277 times [2021-08-21 12:06:27,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:27,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301944934] [2021-08-21 12:06:27,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:27,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:27,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:27,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:27,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301944934] [2021-08-21 12:06:27,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301944934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:27,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233649342] [2021-08-21 12:06:27,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:06:27,361 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:27,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:27,362 INFO L229 MonitoredProcess]: Starting monitored process 279 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:27,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2021-08-21 12:06:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:29,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:29,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:29,300 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:29,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233649342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:29,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:29,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:06:29,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929662916] [2021-08-21 12:06:29,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:06:29,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:29,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:06:29,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:06:29,301 INFO L87 Difference]: Start difference. First operand 7585 states and 22426 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:29,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:29,457 INFO L93 Difference]: Finished difference Result 8186 states and 23572 transitions. [2021-08-21 12:06:29,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:06:29,458 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:29,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:29,471 INFO L225 Difference]: With dead ends: 8186 [2021-08-21 12:06:29,471 INFO L226 Difference]: Without dead ends: 8186 [2021-08-21 12:06:29,471 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 147.6ms TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:06:29,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8186 states. [2021-08-21 12:06:29,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8186 to 7529. [2021-08-21 12:06:29,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7529 states, 7528 states have (on average 2.9556323060573857) internal successors, (22250), 7528 states have internal predecessors, (22250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:29,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7529 states to 7529 states and 22250 transitions. [2021-08-21 12:06:29,597 INFO L78 Accepts]: Start accepts. Automaton has 7529 states and 22250 transitions. Word has length 22 [2021-08-21 12:06:29,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:29,597 INFO L470 AbstractCegarLoop]: Abstraction has 7529 states and 22250 transitions. [2021-08-21 12:06:29,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:29,597 INFO L276 IsEmpty]: Start isEmpty. Operand 7529 states and 22250 transitions. [2021-08-21 12:06:29,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:29,606 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:29,606 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:29,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:29,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2021-08-21 12:06:29,827 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:29,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:29,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1177482659, now seen corresponding path program 278 times [2021-08-21 12:06:29,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:29,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498367234] [2021-08-21 12:06:29,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:29,828 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:29,917 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:29,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:29,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498367234] [2021-08-21 12:06:29,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498367234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:29,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639109975] [2021-08-21 12:06:29,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:06:29,918 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:29,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:29,919 INFO L229 MonitoredProcess]: Starting monitored process 280 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:29,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2021-08-21 12:06:31,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:06:31,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:31,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:31,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:31,871 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:31,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639109975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:31,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:31,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:06:31,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832232746] [2021-08-21 12:06:31,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:06:31,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:31,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:06:31,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:06:31,872 INFO L87 Difference]: Start difference. First operand 7529 states and 22250 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:32,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:32,030 INFO L93 Difference]: Finished difference Result 9518 states and 27641 transitions. [2021-08-21 12:06:32,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:06:32,030 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:32,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:32,047 INFO L225 Difference]: With dead ends: 9518 [2021-08-21 12:06:32,047 INFO L226 Difference]: Without dead ends: 9518 [2021-08-21 12:06:32,047 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:06:32,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9518 states. [2021-08-21 12:06:32,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9518 to 8976. [2021-08-21 12:06:32,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8976 states, 8975 states have (on average 2.962785515320334) internal successors, (26591), 8975 states have internal predecessors, (26591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:32,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8976 states to 8976 states and 26591 transitions. [2021-08-21 12:06:32,198 INFO L78 Accepts]: Start accepts. Automaton has 8976 states and 26591 transitions. Word has length 22 [2021-08-21 12:06:32,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:32,198 INFO L470 AbstractCegarLoop]: Abstraction has 8976 states and 26591 transitions. [2021-08-21 12:06:32,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:32,198 INFO L276 IsEmpty]: Start isEmpty. Operand 8976 states and 26591 transitions. [2021-08-21 12:06:32,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:32,207 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:32,207 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:32,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Ended with exit code 0 [2021-08-21 12:06:32,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2021-08-21 12:06:32,410 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:32,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:32,411 INFO L82 PathProgramCache]: Analyzing trace with hash 332511207, now seen corresponding path program 279 times [2021-08-21 12:06:32,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:32,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839434579] [2021-08-21 12:06:32,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:32,411 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:32,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:32,526 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:32,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:32,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839434579] [2021-08-21 12:06:32,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839434579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:32,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844821913] [2021-08-21 12:06:32,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:06:32,527 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:32,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:32,528 INFO L229 MonitoredProcess]: Starting monitored process 281 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:32,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2021-08-21 12:06:34,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:06:34,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:34,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:34,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:34,507 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:34,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844821913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:34,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:34,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:06:34,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473375262] [2021-08-21 12:06:34,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:06:34,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:34,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:06:34,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:06:34,508 INFO L87 Difference]: Start difference. First operand 8976 states and 26591 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:34,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:34,750 INFO L93 Difference]: Finished difference Result 9584 states and 27812 transitions. [2021-08-21 12:06:34,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:06:34,750 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:34,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:34,766 INFO L225 Difference]: With dead ends: 9584 [2021-08-21 12:06:34,767 INFO L226 Difference]: Without dead ends: 9584 [2021-08-21 12:06:34,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 195.0ms TimeCoverageRelationStatistics Valid=322, Invalid=670, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:06:34,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9584 states. [2021-08-21 12:06:34,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9584 to 8969. [2021-08-21 12:06:34,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8969 states, 8968 states have (on average 2.96264495985727) internal successors, (26569), 8968 states have internal predecessors, (26569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:34,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8969 states to 8969 states and 26569 transitions. [2021-08-21 12:06:34,917 INFO L78 Accepts]: Start accepts. Automaton has 8969 states and 26569 transitions. Word has length 22 [2021-08-21 12:06:34,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:34,918 INFO L470 AbstractCegarLoop]: Abstraction has 8969 states and 26569 transitions. [2021-08-21 12:06:34,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:34,918 INFO L276 IsEmpty]: Start isEmpty. Operand 8969 states and 26569 transitions. [2021-08-21 12:06:34,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:34,928 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:34,928 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:34,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:35,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:35,138 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:35,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:35,139 INFO L82 PathProgramCache]: Analyzing trace with hash -91800029, now seen corresponding path program 280 times [2021-08-21 12:06:35,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:35,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729648940] [2021-08-21 12:06:35,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:35,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:35,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:35,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:35,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729648940] [2021-08-21 12:06:35,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729648940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:35,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378771652] [2021-08-21 12:06:35,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:06:35,254 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:35,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:35,254 INFO L229 MonitoredProcess]: Starting monitored process 282 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:35,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2021-08-21 12:06:37,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:06:37,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:37,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:37,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:37,224 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:37,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378771652] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:37,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:37,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:06:37,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200317263] [2021-08-21 12:06:37,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:06:37,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:37,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:06:37,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:06:37,225 INFO L87 Difference]: Start difference. First operand 8969 states and 26569 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:37,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:37,588 INFO L93 Difference]: Finished difference Result 10365 states and 30122 transitions. [2021-08-21 12:06:37,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:06:37,589 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:37,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:37,607 INFO L225 Difference]: With dead ends: 10365 [2021-08-21 12:06:37,607 INFO L226 Difference]: Without dead ends: 10365 [2021-08-21 12:06:37,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 296.6ms TimeCoverageRelationStatistics Valid=551, Invalid=1089, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 12:06:37,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10365 states. [2021-08-21 12:06:37,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10365 to 9680. [2021-08-21 12:06:37,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9680 states, 9679 states have (on average 2.965388986465544) internal successors, (28702), 9679 states have internal predecessors, (28702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:37,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9680 states to 9680 states and 28702 transitions. [2021-08-21 12:06:37,765 INFO L78 Accepts]: Start accepts. Automaton has 9680 states and 28702 transitions. Word has length 22 [2021-08-21 12:06:37,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:37,765 INFO L470 AbstractCegarLoop]: Abstraction has 9680 states and 28702 transitions. [2021-08-21 12:06:37,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:37,765 INFO L276 IsEmpty]: Start isEmpty. Operand 9680 states and 28702 transitions. [2021-08-21 12:06:37,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:37,774 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:37,774 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:37,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Ended with exit code 0 [2021-08-21 12:06:37,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:37,989 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:37,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:37,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1065869467, now seen corresponding path program 281 times [2021-08-21 12:06:37,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:37,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297989335] [2021-08-21 12:06:37,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:37,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:38,093 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:38,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:38,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297989335] [2021-08-21 12:06:38,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297989335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:38,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975890435] [2021-08-21 12:06:38,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:06:38,094 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:38,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:38,094 INFO L229 MonitoredProcess]: Starting monitored process 283 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:38,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2021-08-21 12:06:40,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:06:40,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:40,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:40,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:40,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975890435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:40,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:40,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:06:40,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220522117] [2021-08-21 12:06:40,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:06:40,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:40,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:06:40,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:06:40,065 INFO L87 Difference]: Start difference. First operand 9680 states and 28702 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:40,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:40,327 INFO L93 Difference]: Finished difference Result 10027 states and 29184 transitions. [2021-08-21 12:06:40,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:06:40,328 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:40,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:40,345 INFO L225 Difference]: With dead ends: 10027 [2021-08-21 12:06:40,345 INFO L226 Difference]: Without dead ends: 10019 [2021-08-21 12:06:40,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 197.9ms TimeCoverageRelationStatistics Valid=312, Invalid=618, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:06:40,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10019 states. [2021-08-21 12:06:40,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10019 to 9630. [2021-08-21 12:06:40,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9630 states, 9629 states have (on average 2.962405234188389) internal successors, (28525), 9629 states have internal predecessors, (28525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:40,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9630 states to 9630 states and 28525 transitions. [2021-08-21 12:06:40,538 INFO L78 Accepts]: Start accepts. Automaton has 9630 states and 28525 transitions. Word has length 22 [2021-08-21 12:06:40,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:40,538 INFO L470 AbstractCegarLoop]: Abstraction has 9630 states and 28525 transitions. [2021-08-21 12:06:40,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:40,538 INFO L276 IsEmpty]: Start isEmpty. Operand 9630 states and 28525 transitions. [2021-08-21 12:06:40,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:40,549 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:40,549 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:40,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Ended with exit code 0 [2021-08-21 12:06:40,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable284 [2021-08-21 12:06:40,751 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:40,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:40,751 INFO L82 PathProgramCache]: Analyzing trace with hash -774622821, now seen corresponding path program 282 times [2021-08-21 12:06:40,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:40,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426320469] [2021-08-21 12:06:40,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:40,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:40,861 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:40,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:40,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426320469] [2021-08-21 12:06:40,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426320469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:40,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25635019] [2021-08-21 12:06:40,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:06:40,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:40,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:40,862 INFO L229 MonitoredProcess]: Starting monitored process 284 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:40,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2021-08-21 12:06:42,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:06:42,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:42,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:42,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:42,859 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:42,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25635019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:42,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:42,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:06:42,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533205806] [2021-08-21 12:06:42,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:06:42,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:42,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:06:42,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:06:42,860 INFO L87 Difference]: Start difference. First operand 9630 states and 28525 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:43,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:43,131 INFO L93 Difference]: Finished difference Result 12046 states and 35380 transitions. [2021-08-21 12:06:43,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:06:43,132 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-08-21 12:06:43,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:43,154 INFO L225 Difference]: With dead ends: 12046 [2021-08-21 12:06:43,154 INFO L226 Difference]: Without dead ends: 12046 [2021-08-21 12:06:43,155 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 227.8ms TimeCoverageRelationStatistics Valid=402, Invalid=788, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:06:43,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12046 states. [2021-08-21 12:06:43,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12046 to 9383. [2021-08-21 12:06:43,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9383 states, 9382 states have (on average 2.9607759539543808) internal successors, (27778), 9382 states have internal predecessors, (27778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:43,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9383 states to 9383 states and 27778 transitions. [2021-08-21 12:06:43,343 INFO L78 Accepts]: Start accepts. Automaton has 9383 states and 27778 transitions. Word has length 22 [2021-08-21 12:06:43,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:43,343 INFO L470 AbstractCegarLoop]: Abstraction has 9383 states and 27778 transitions. [2021-08-21 12:06:43,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:43,343 INFO L276 IsEmpty]: Start isEmpty. Operand 9383 states and 27778 transitions. [2021-08-21 12:06:43,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:43,353 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:43,353 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:43,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:43,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:43,569 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:43,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:43,569 INFO L82 PathProgramCache]: Analyzing trace with hash -849590245, now seen corresponding path program 283 times [2021-08-21 12:06:43,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:43,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596018551] [2021-08-21 12:06:43,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:43,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:43,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:43,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:43,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596018551] [2021-08-21 12:06:43,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596018551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:43,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282889238] [2021-08-21 12:06:43,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:06:43,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:43,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:43,651 INFO L229 MonitoredProcess]: Starting monitored process 285 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:43,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2021-08-21 12:06:45,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:45,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:45,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:45,658 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:45,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282889238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:45,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:45,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 12:06:45,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670080967] [2021-08-21 12:06:45,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:06:45,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:45,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:06:45,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:06:45,659 INFO L87 Difference]: Start difference. First operand 9383 states and 27778 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:45,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:45,838 INFO L93 Difference]: Finished difference Result 10021 states and 29277 transitions. [2021-08-21 12:06:45,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:06:45,838 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 22 [2021-08-21 12:06:45,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:45,856 INFO L225 Difference]: With dead ends: 10021 [2021-08-21 12:06:45,856 INFO L226 Difference]: Without dead ends: 10021 [2021-08-21 12:06:45,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 142.4ms TimeCoverageRelationStatistics Valid=245, Invalid=457, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:06:45,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10021 states. [2021-08-21 12:06:45,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10021 to 9466. [2021-08-21 12:06:45,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9466 states, 9465 states have (on average 2.9618594823032223) internal successors, (28034), 9465 states have internal predecessors, (28034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:46,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9466 states to 9466 states and 28034 transitions. [2021-08-21 12:06:46,011 INFO L78 Accepts]: Start accepts. Automaton has 9466 states and 28034 transitions. Word has length 22 [2021-08-21 12:06:46,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:46,011 INFO L470 AbstractCegarLoop]: Abstraction has 9466 states and 28034 transitions. [2021-08-21 12:06:46,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:46,012 INFO L276 IsEmpty]: Start isEmpty. Operand 9466 states and 28034 transitions. [2021-08-21 12:06:46,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:46,021 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:46,021 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:46,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Ended with exit code 0 [2021-08-21 12:06:46,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:46,243 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:46,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:46,243 INFO L82 PathProgramCache]: Analyzing trace with hash 244501343, now seen corresponding path program 284 times [2021-08-21 12:06:46,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:46,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700348291] [2021-08-21 12:06:46,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:46,243 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:46,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:46,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700348291] [2021-08-21 12:06:46,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700348291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:46,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973496072] [2021-08-21 12:06:46,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:06:46,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:46,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:46,334 INFO L229 MonitoredProcess]: Starting monitored process 286 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:46,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2021-08-21 12:06:48,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:06:48,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:48,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:48,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:48,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973496072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:48,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:48,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:06:48,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134832606] [2021-08-21 12:06:48,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:06:48,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:48,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:06:48,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:06:48,357 INFO L87 Difference]: Start difference. First operand 9466 states and 28034 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:48,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:48,544 INFO L93 Difference]: Finished difference Result 9866 states and 28888 transitions. [2021-08-21 12:06:48,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:06:48,544 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:48,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:48,558 INFO L225 Difference]: With dead ends: 9866 [2021-08-21 12:06:48,558 INFO L226 Difference]: Without dead ends: 9866 [2021-08-21 12:06:48,559 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:06:48,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9866 states. [2021-08-21 12:06:48,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9866 to 8650. [2021-08-21 12:06:48,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8650 states, 8649 states have (on average 2.955717423979651) internal successors, (25564), 8649 states have internal predecessors, (25564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:48,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8650 states to 8650 states and 25564 transitions. [2021-08-21 12:06:48,684 INFO L78 Accepts]: Start accepts. Automaton has 8650 states and 25564 transitions. Word has length 22 [2021-08-21 12:06:48,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:48,684 INFO L470 AbstractCegarLoop]: Abstraction has 8650 states and 25564 transitions. [2021-08-21 12:06:48,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:48,684 INFO L276 IsEmpty]: Start isEmpty. Operand 8650 states and 25564 transitions. [2021-08-21 12:06:48,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:48,692 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:48,692 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:48,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:48,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-08-21 12:06:48,914 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:48,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:48,914 INFO L82 PathProgramCache]: Analyzing trace with hash -198397797, now seen corresponding path program 285 times [2021-08-21 12:06:48,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:48,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601912269] [2021-08-21 12:06:48,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:48,914 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:48,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:49,002 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:49,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:49,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601912269] [2021-08-21 12:06:49,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601912269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:49,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608105184] [2021-08-21 12:06:49,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:06:49,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:49,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:49,003 INFO L229 MonitoredProcess]: Starting monitored process 287 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:49,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2021-08-21 12:06:50,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:06:50,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:50,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:50,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:51,021 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:51,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608105184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:51,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:51,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:06:51,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219619083] [2021-08-21 12:06:51,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:06:51,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:51,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:06:51,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:06:51,022 INFO L87 Difference]: Start difference. First operand 8650 states and 25564 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:51,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:51,148 INFO L93 Difference]: Finished difference Result 9567 states and 27816 transitions. [2021-08-21 12:06:51,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:06:51,148 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:51,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:51,163 INFO L225 Difference]: With dead ends: 9567 [2021-08-21 12:06:51,163 INFO L226 Difference]: Without dead ends: 9567 [2021-08-21 12:06:51,163 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:06:51,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9567 states. [2021-08-21 12:06:51,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9567 to 9079. [2021-08-21 12:06:51,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9079 states, 9078 states have (on average 2.9547257105089226) internal successors, (26823), 9078 states have internal predecessors, (26823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:51,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9079 states to 9079 states and 26823 transitions. [2021-08-21 12:06:51,309 INFO L78 Accepts]: Start accepts. Automaton has 9079 states and 26823 transitions. Word has length 22 [2021-08-21 12:06:51,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:51,309 INFO L470 AbstractCegarLoop]: Abstraction has 9079 states and 26823 transitions. [2021-08-21 12:06:51,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:51,309 INFO L276 IsEmpty]: Start isEmpty. Operand 9079 states and 26823 transitions. [2021-08-21 12:06:51,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:51,319 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:51,319 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:51,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:51,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-08-21 12:06:51,533 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:51,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:51,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1043369249, now seen corresponding path program 286 times [2021-08-21 12:06:51,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:51,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983208853] [2021-08-21 12:06:51,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:51,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:51,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:51,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:51,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983208853] [2021-08-21 12:06:51,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983208853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:51,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534861854] [2021-08-21 12:06:51,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:06:51,631 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:51,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:51,632 INFO L229 MonitoredProcess]: Starting monitored process 288 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:51,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2021-08-21 12:06:53,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:06:53,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:53,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:53,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:53,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534861854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:53,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:53,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:06:53,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593444699] [2021-08-21 12:06:53,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:06:53,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:53,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:06:53,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:06:53,652 INFO L87 Difference]: Start difference. First operand 9079 states and 26823 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:53,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:53,859 INFO L93 Difference]: Finished difference Result 9673 states and 28056 transitions. [2021-08-21 12:06:53,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:06:53,860 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-08-21 12:06:53,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:53,876 INFO L225 Difference]: With dead ends: 9673 [2021-08-21 12:06:53,876 INFO L226 Difference]: Without dead ends: 9673 [2021-08-21 12:06:53,877 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 173.3ms TimeCoverageRelationStatistics Valid=321, Invalid=671, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:06:53,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9673 states. [2021-08-21 12:06:53,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9673 to 8849. [2021-08-21 12:06:54,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8849 states, 8848 states have (on average 2.953096745027125) internal successors, (26129), 8848 states have internal predecessors, (26129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:54,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8849 states to 8849 states and 26129 transitions. [2021-08-21 12:06:54,018 INFO L78 Accepts]: Start accepts. Automaton has 8849 states and 26129 transitions. Word has length 22 [2021-08-21 12:06:54,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:54,019 INFO L470 AbstractCegarLoop]: Abstraction has 8849 states and 26129 transitions. [2021-08-21 12:06:54,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:54,019 INFO L276 IsEmpty]: Start isEmpty. Operand 8849 states and 26129 transitions. [2021-08-21 12:06:54,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:54,035 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:54,035 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:54,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:54,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-08-21 12:06:54,237 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:54,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:54,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1467680485, now seen corresponding path program 287 times [2021-08-21 12:06:54,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:54,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914422900] [2021-08-21 12:06:54,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:54,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:54,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:54,342 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:54,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:54,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914422900] [2021-08-21 12:06:54,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914422900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:54,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197604354] [2021-08-21 12:06:54,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:06:54,342 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:54,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:54,343 INFO L229 MonitoredProcess]: Starting monitored process 289 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:54,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2021-08-21 12:06:56,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:06:56,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:56,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:56,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:56,335 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:56,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197604354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:56,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:56,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:06:56,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054746480] [2021-08-21 12:06:56,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:06:56,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:56,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:06:56,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:06:56,336 INFO L87 Difference]: Start difference. First operand 8849 states and 26129 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:56,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:56,665 INFO L93 Difference]: Finished difference Result 9800 states and 28375 transitions. [2021-08-21 12:06:56,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:06:56,665 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-08-21 12:06:56,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:56,679 INFO L225 Difference]: With dead ends: 9800 [2021-08-21 12:06:56,679 INFO L226 Difference]: Without dead ends: 9800 [2021-08-21 12:06:56,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 278.7ms TimeCoverageRelationStatistics Valid=550, Invalid=1090, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 12:06:56,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9800 states. [2021-08-21 12:06:56,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9800 to 8674. [2021-08-21 12:06:56,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8674 states, 8673 states have (on average 2.9582612706099387) internal successors, (25657), 8673 states have internal predecessors, (25657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:56,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8674 states to 8674 states and 25657 transitions. [2021-08-21 12:06:56,806 INFO L78 Accepts]: Start accepts. Automaton has 8674 states and 25657 transitions. Word has length 22 [2021-08-21 12:06:56,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:56,806 INFO L470 AbstractCegarLoop]: Abstraction has 8674 states and 25657 transitions. [2021-08-21 12:06:56,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:56,806 INFO L276 IsEmpty]: Start isEmpty. Operand 8674 states and 25657 transitions. [2021-08-21 12:06:56,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:56,814 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:56,814 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:56,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:57,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:57,033 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:57,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:57,033 INFO L82 PathProgramCache]: Analyzing trace with hash 2607349, now seen corresponding path program 288 times [2021-08-21 12:06:57,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:57,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3796728] [2021-08-21 12:06:57,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:57,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:57,117 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:57,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:57,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3796728] [2021-08-21 12:06:57,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3796728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:57,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703075587] [2021-08-21 12:06:57,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:06:57,118 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:57,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:57,118 INFO L229 MonitoredProcess]: Starting monitored process 290 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:57,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2021-08-21 12:06:59,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:06:59,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:59,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:59,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:59,126 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:59,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703075587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:59,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:59,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:06:59,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553801881] [2021-08-21 12:06:59,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:06:59,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:59,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:06:59,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:06:59,127 INFO L87 Difference]: Start difference. First operand 8674 states and 25657 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:59,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:59,345 INFO L93 Difference]: Finished difference Result 8945 states and 26008 transitions. [2021-08-21 12:06:59,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:06:59,345 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 22 [2021-08-21 12:06:59,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:59,360 INFO L225 Difference]: With dead ends: 8945 [2021-08-21 12:06:59,360 INFO L226 Difference]: Without dead ends: 8939 [2021-08-21 12:06:59,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 154.8ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:06:59,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8939 states. [2021-08-21 12:06:59,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8939 to 8672. [2021-08-21 12:06:59,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8672 states, 8671 states have (on average 2.9569830469380696) internal successors, (25640), 8671 states have internal predecessors, (25640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:59,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8672 states to 8672 states and 25640 transitions. [2021-08-21 12:06:59,508 INFO L78 Accepts]: Start accepts. Automaton has 8672 states and 25640 transitions. Word has length 22 [2021-08-21 12:06:59,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:59,509 INFO L470 AbstractCegarLoop]: Abstraction has 8672 states and 25640 transitions. [2021-08-21 12:06:59,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:59,509 INFO L276 IsEmpty]: Start isEmpty. Operand 8672 states and 25640 transitions. [2021-08-21 12:06:59,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:59,517 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:59,517 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:59,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:59,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2021-08-21 12:06:59,731 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:59,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:59,731 INFO L82 PathProgramCache]: Analyzing trace with hash -604194601, now seen corresponding path program 289 times [2021-08-21 12:06:59,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:59,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361230582] [2021-08-21 12:06:59,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:59,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:59,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:59,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361230582] [2021-08-21 12:06:59,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361230582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:59,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197543742] [2021-08-21 12:06:59,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:06:59,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:59,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:59,822 INFO L229 MonitoredProcess]: Starting monitored process 291 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:59,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2021-08-21 12:07:01,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:01,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:01,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:01,870 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:07:01,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197543742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:01,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:01,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:07:01,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385029774] [2021-08-21 12:07:01,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:07:01,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:01,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:07:01,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:07:01,871 INFO L87 Difference]: Start difference. First operand 8672 states and 25640 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:01,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:01,980 INFO L93 Difference]: Finished difference Result 10030 states and 29363 transitions. [2021-08-21 12:07:01,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:07:01,980 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:01,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:01,994 INFO L225 Difference]: With dead ends: 10030 [2021-08-21 12:07:01,994 INFO L226 Difference]: Without dead ends: 10030 [2021-08-21 12:07:01,994 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:07:02,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10030 states. [2021-08-21 12:07:02,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10030 to 9792. [2021-08-21 12:07:02,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9792 states, 9791 states have (on average 2.9593504238586457) internal successors, (28975), 9791 states have internal predecessors, (28975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:02,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9792 states to 9792 states and 28975 transitions. [2021-08-21 12:07:02,131 INFO L78 Accepts]: Start accepts. Automaton has 9792 states and 28975 transitions. Word has length 22 [2021-08-21 12:07:02,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:02,131 INFO L470 AbstractCegarLoop]: Abstraction has 9792 states and 28975 transitions. [2021-08-21 12:07:02,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:02,131 INFO L276 IsEmpty]: Start isEmpty. Operand 9792 states and 28975 transitions. [2021-08-21 12:07:02,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:02,140 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:02,140 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:02,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:02,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,291 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:02,362 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:02,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:02,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1449166053, now seen corresponding path program 290 times [2021-08-21 12:07:02,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:02,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929914737] [2021-08-21 12:07:02,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:02,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:02,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:02,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:02,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929914737] [2021-08-21 12:07:02,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929914737] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:02,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497184795] [2021-08-21 12:07:02,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:07:02,462 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:02,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:02,463 INFO L229 MonitoredProcess]: Starting monitored process 292 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:02,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2021-08-21 12:07:04,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:07:04,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:04,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:04,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:04,556 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:04,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497184795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:04,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:04,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:07:04,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234651086] [2021-08-21 12:07:04,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:04,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:04,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:04,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:04,556 INFO L87 Difference]: Start difference. First operand 9792 states and 28975 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:04,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:04,735 INFO L93 Difference]: Finished difference Result 10116 states and 29547 transitions. [2021-08-21 12:07:04,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:07:04,736 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-08-21 12:07:04,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:04,752 INFO L225 Difference]: With dead ends: 10116 [2021-08-21 12:07:04,752 INFO L226 Difference]: Without dead ends: 10116 [2021-08-21 12:07:04,753 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 161.8ms TimeCoverageRelationStatistics Valid=282, Invalid=588, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:07:04,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10116 states. [2021-08-21 12:07:04,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10116 to 9802. [2021-08-21 12:07:04,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9802 states, 9801 states have (on average 2.9593918987858383) internal successors, (29005), 9801 states have internal predecessors, (29005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:04,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9802 states to 9802 states and 29005 transitions. [2021-08-21 12:07:04,903 INFO L78 Accepts]: Start accepts. Automaton has 9802 states and 29005 transitions. Word has length 22 [2021-08-21 12:07:04,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:04,903 INFO L470 AbstractCegarLoop]: Abstraction has 9802 states and 29005 transitions. [2021-08-21 12:07:04,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:04,903 INFO L276 IsEmpty]: Start isEmpty. Operand 9802 states and 29005 transitions. [2021-08-21 12:07:04,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:04,914 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:04,914 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:04,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:05,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:05,129 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:05,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:05,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1873477289, now seen corresponding path program 291 times [2021-08-21 12:07:05,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:05,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142216160] [2021-08-21 12:07:05,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:05,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:05,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:05,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142216160] [2021-08-21 12:07:05,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142216160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:05,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366307629] [2021-08-21 12:07:05,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:07:05,255 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:05,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:05,256 INFO L229 MonitoredProcess]: Starting monitored process 293 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:05,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2021-08-21 12:07:07,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:07:07,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:07,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:07,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:07,288 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:07,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366307629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:07,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:07,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:07:07,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279096363] [2021-08-21 12:07:07,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:07,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:07,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:07,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:07,288 INFO L87 Difference]: Start difference. First operand 9802 states and 29005 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:07,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:07,620 INFO L93 Difference]: Finished difference Result 11442 states and 33422 transitions. [2021-08-21 12:07:07,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:07:07,620 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-08-21 12:07:07,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:07,636 INFO L225 Difference]: With dead ends: 11442 [2021-08-21 12:07:07,637 INFO L226 Difference]: Without dead ends: 11442 [2021-08-21 12:07:07,637 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 292.2ms TimeCoverageRelationStatistics Valid=502, Invalid=980, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:07:07,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11442 states. [2021-08-21 12:07:07,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11442 to 10820. [2021-08-21 12:07:07,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10820 states, 10819 states have (on average 2.9625658563638044) internal successors, (32052), 10819 states have internal predecessors, (32052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:07,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10820 states to 10820 states and 32052 transitions. [2021-08-21 12:07:07,796 INFO L78 Accepts]: Start accepts. Automaton has 10820 states and 32052 transitions. Word has length 22 [2021-08-21 12:07:07,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:07,796 INFO L470 AbstractCegarLoop]: Abstraction has 10820 states and 32052 transitions. [2021-08-21 12:07:07,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:07,796 INFO L276 IsEmpty]: Start isEmpty. Operand 10820 states and 32052 transitions. [2021-08-21 12:07:07,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:07,806 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:07,806 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:07,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Ended with exit code 0 [2021-08-21 12:07:08,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,293 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:08,025 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:08,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:08,025 INFO L82 PathProgramCache]: Analyzing trace with hash -31691429, now seen corresponding path program 292 times [2021-08-21 12:07:08,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:08,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141949141] [2021-08-21 12:07:08,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:08,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:08,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:08,099 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:08,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:08,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141949141] [2021-08-21 12:07:08,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141949141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:08,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099192195] [2021-08-21 12:07:08,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:07:08,099 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:08,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:08,100 INFO L229 MonitoredProcess]: Starting monitored process 294 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:08,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2021-08-21 12:07:10,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:07:10,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:10,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:10,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:10,086 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:10,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099192195] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:10,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:10,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 12:07:10,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103431577] [2021-08-21 12:07:10,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:07:10,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:10,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:07:10,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:07:10,087 INFO L87 Difference]: Start difference. First operand 10820 states and 32052 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:10,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:10,350 INFO L93 Difference]: Finished difference Result 11016 states and 32285 transitions. [2021-08-21 12:07:10,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:07:10,350 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 22 [2021-08-21 12:07:10,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:10,367 INFO L225 Difference]: With dead ends: 11016 [2021-08-21 12:07:10,367 INFO L226 Difference]: Without dead ends: 11012 [2021-08-21 12:07:10,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 125.5ms TimeCoverageRelationStatistics Valid=209, Invalid=391, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:07:10,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11012 states. [2021-08-21 12:07:10,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11012 to 10820. [2021-08-21 12:07:10,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10820 states, 10819 states have (on average 2.9622885664109435) internal successors, (32049), 10819 states have internal predecessors, (32049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:10,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10820 states to 10820 states and 32049 transitions. [2021-08-21 12:07:10,528 INFO L78 Accepts]: Start accepts. Automaton has 10820 states and 32049 transitions. Word has length 22 [2021-08-21 12:07:10,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:10,528 INFO L470 AbstractCegarLoop]: Abstraction has 10820 states and 32049 transitions. [2021-08-21 12:07:10,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:10,528 INFO L276 IsEmpty]: Start isEmpty. Operand 10820 states and 32049 transitions. [2021-08-21 12:07:10,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:10,538 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:10,538 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:10,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Ended with exit code 0 [2021-08-21 12:07:10,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:10,759 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:10,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:10,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1854210459, now seen corresponding path program 293 times [2021-08-21 12:07:10,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:10,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941728797] [2021-08-21 12:07:10,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:10,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:10,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:10,860 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:10,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:10,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941728797] [2021-08-21 12:07:10,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941728797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:10,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932557507] [2021-08-21 12:07:10,861 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:07:10,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:10,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:10,861 INFO L229 MonitoredProcess]: Starting monitored process 295 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:10,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2021-08-21 12:07:12,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:07:12,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:12,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:12,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:12,882 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:12,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932557507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:12,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:12,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:07:12,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123969511] [2021-08-21 12:07:12,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:12,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:12,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:12,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:12,883 INFO L87 Difference]: Start difference. First operand 10820 states and 32049 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:13,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:13,191 INFO L93 Difference]: Finished difference Result 13167 states and 38664 transitions. [2021-08-21 12:07:13,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:07:13,191 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-08-21 12:07:13,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:13,211 INFO L225 Difference]: With dead ends: 13167 [2021-08-21 12:07:13,211 INFO L226 Difference]: Without dead ends: 13167 [2021-08-21 12:07:13,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 224.4ms TimeCoverageRelationStatistics Valid=424, Invalid=836, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:07:13,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13167 states. [2021-08-21 12:07:13,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13167 to 12472. [2021-08-21 12:07:13,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12472 states, 12471 states have (on average 2.9668029829203753) internal successors, (36999), 12471 states have internal predecessors, (36999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:13,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12472 states to 12472 states and 36999 transitions. [2021-08-21 12:07:13,402 INFO L78 Accepts]: Start accepts. Automaton has 12472 states and 36999 transitions. Word has length 22 [2021-08-21 12:07:13,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:13,402 INFO L470 AbstractCegarLoop]: Abstraction has 12472 states and 36999 transitions. [2021-08-21 12:07:13,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:13,402 INFO L276 IsEmpty]: Start isEmpty. Operand 12472 states and 36999 transitions. [2021-08-21 12:07:13,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:13,413 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:13,414 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:13,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:13,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,295 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:13,635 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:13,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:13,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1972460491, now seen corresponding path program 294 times [2021-08-21 12:07:13,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:13,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249885494] [2021-08-21 12:07:13,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:13,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:13,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:13,703 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:13,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:13,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249885494] [2021-08-21 12:07:13,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249885494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:13,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537439783] [2021-08-21 12:07:13,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:07:13,704 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:13,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:13,704 INFO L229 MonitoredProcess]: Starting monitored process 296 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:13,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2021-08-21 12:07:15,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:07:15,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:15,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:15,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:15,775 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:15,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537439783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:15,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:15,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:07:15,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71089444] [2021-08-21 12:07:15,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:07:15,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:15,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:07:15,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:07:15,776 INFO L87 Difference]: Start difference. First operand 12472 states and 36999 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:15,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:15,957 INFO L93 Difference]: Finished difference Result 12677 states and 37270 transitions. [2021-08-21 12:07:15,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:07:15,958 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:15,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:15,984 INFO L225 Difference]: With dead ends: 12677 [2021-08-21 12:07:15,984 INFO L226 Difference]: Without dead ends: 12675 [2021-08-21 12:07:15,985 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:07:15,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12675 states. [2021-08-21 12:07:16,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12675 to 12492. [2021-08-21 12:07:16,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12492 states, 12491 states have (on average 2.9671763669842286) internal successors, (37063), 12491 states have internal predecessors, (37063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:16,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12492 states to 12492 states and 37063 transitions. [2021-08-21 12:07:16,233 INFO L78 Accepts]: Start accepts. Automaton has 12492 states and 37063 transitions. Word has length 22 [2021-08-21 12:07:16,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:16,233 INFO L470 AbstractCegarLoop]: Abstraction has 12492 states and 37063 transitions. [2021-08-21 12:07:16,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:16,233 INFO L276 IsEmpty]: Start isEmpty. Operand 12492 states and 37063 transitions. [2021-08-21 12:07:16,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:16,246 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:16,246 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:16,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Ended with exit code 0 [2021-08-21 12:07:16,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,296 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:16,461 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:16,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:16,461 INFO L82 PathProgramCache]: Analyzing trace with hash 604163099, now seen corresponding path program 295 times [2021-08-21 12:07:16,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:16,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160424297] [2021-08-21 12:07:16,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:16,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:16,533 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:16,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:16,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160424297] [2021-08-21 12:07:16,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160424297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:16,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416897162] [2021-08-21 12:07:16,534 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:07:16,534 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:16,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:16,534 INFO L229 MonitoredProcess]: Starting monitored process 297 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:16,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2021-08-21 12:07:18,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:18,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:18,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:07:18,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416897162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:18,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:18,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:07:18,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96368358] [2021-08-21 12:07:18,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:07:18,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:18,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:07:18,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:07:18,633 INFO L87 Difference]: Start difference. First operand 12492 states and 37063 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:18,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:18,795 INFO L93 Difference]: Finished difference Result 13057 states and 38349 transitions. [2021-08-21 12:07:18,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:07:18,796 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:18,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:18,821 INFO L225 Difference]: With dead ends: 13057 [2021-08-21 12:07:18,821 INFO L226 Difference]: Without dead ends: 13057 [2021-08-21 12:07:18,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:07:18,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13057 states. [2021-08-21 12:07:18,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13057 to 12493. [2021-08-21 12:07:19,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12493 states, 12492 states have (on average 2.9670188920909384) internal successors, (37064), 12492 states have internal predecessors, (37064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:19,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12493 states to 12493 states and 37064 transitions. [2021-08-21 12:07:19,036 INFO L78 Accepts]: Start accepts. Automaton has 12493 states and 37064 transitions. Word has length 22 [2021-08-21 12:07:19,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:19,037 INFO L470 AbstractCegarLoop]: Abstraction has 12493 states and 37064 transitions. [2021-08-21 12:07:19,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:19,037 INFO L276 IsEmpty]: Start isEmpty. Operand 12493 states and 37064 transitions. [2021-08-21 12:07:19,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:19,048 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:19,048 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:19,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Ended with exit code 0 [2021-08-21 12:07:19,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-08-21 12:07:19,262 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:19,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:19,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1980190889, now seen corresponding path program 296 times [2021-08-21 12:07:19,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:19,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131380356] [2021-08-21 12:07:19,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:19,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:19,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:19,336 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:19,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:19,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131380356] [2021-08-21 12:07:19,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131380356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:19,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911872091] [2021-08-21 12:07:19,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:07:19,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:19,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:19,342 INFO L229 MonitoredProcess]: Starting monitored process 298 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:19,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2021-08-21 12:07:21,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:07:21,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:21,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:21,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:21,496 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:21,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911872091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:21,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:21,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 12:07:21,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548967728] [2021-08-21 12:07:21,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:07:21,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:21,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:07:21,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:07:21,497 INFO L87 Difference]: Start difference. First operand 12493 states and 37064 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:21,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:21,707 INFO L93 Difference]: Finished difference Result 13444 states and 39422 transitions. [2021-08-21 12:07:21,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:07:21,707 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 22 [2021-08-21 12:07:21,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:21,733 INFO L225 Difference]: With dead ends: 13444 [2021-08-21 12:07:21,734 INFO L226 Difference]: Without dead ends: 13444 [2021-08-21 12:07:21,734 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 129.6ms TimeCoverageRelationStatistics Valid=233, Invalid=417, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:07:21,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13444 states. [2021-08-21 12:07:21,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13444 to 12497. [2021-08-21 12:07:21,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12497 states, 12496 states have (on average 2.9668693982074266) internal successors, (37074), 12496 states have internal predecessors, (37074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:21,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12497 states to 12497 states and 37074 transitions. [2021-08-21 12:07:21,957 INFO L78 Accepts]: Start accepts. Automaton has 12497 states and 37074 transitions. Word has length 22 [2021-08-21 12:07:21,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:21,957 INFO L470 AbstractCegarLoop]: Abstraction has 12497 states and 37074 transitions. [2021-08-21 12:07:21,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:21,957 INFO L276 IsEmpty]: Start isEmpty. Operand 12497 states and 37074 transitions. [2021-08-21 12:07:21,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:21,969 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:21,969 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:21,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Ended with exit code 0 [2021-08-21 12:07:22,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:22,177 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:22,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:22,178 INFO L82 PathProgramCache]: Analyzing trace with hash -490785893, now seen corresponding path program 297 times [2021-08-21 12:07:22,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:22,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067883540] [2021-08-21 12:07:22,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:22,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:22,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:07:22,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:22,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067883540] [2021-08-21 12:07:22,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067883540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:22,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632793093] [2021-08-21 12:07:22,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:07:22,254 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:22,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:22,255 INFO L229 MonitoredProcess]: Starting monitored process 299 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:22,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2021-08-21 12:07:24,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:07:24,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:24,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:24,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:07:24,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632793093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:24,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:24,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 12:07:24,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849517177] [2021-08-21 12:07:24,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:07:24,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:24,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:07:24,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:07:24,386 INFO L87 Difference]: Start difference. First operand 12497 states and 37074 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:24,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:24,608 INFO L93 Difference]: Finished difference Result 15107 states and 44221 transitions. [2021-08-21 12:07:24,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:07:24,608 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 22 [2021-08-21 12:07:24,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:24,642 INFO L225 Difference]: With dead ends: 15107 [2021-08-21 12:07:24,642 INFO L226 Difference]: Without dead ends: 15107 [2021-08-21 12:07:24,643 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 152.3ms TimeCoverageRelationStatistics Valid=282, Invalid=530, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:07:24,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15107 states. [2021-08-21 12:07:24,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15107 to 13778. [2021-08-21 12:07:24,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13778 states, 13777 states have (on average 2.9714016113812876) internal successors, (40937), 13777 states have internal predecessors, (40937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:24,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13778 states to 13778 states and 40937 transitions. [2021-08-21 12:07:24,919 INFO L78 Accepts]: Start accepts. Automaton has 13778 states and 40937 transitions. Word has length 22 [2021-08-21 12:07:24,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:24,919 INFO L470 AbstractCegarLoop]: Abstraction has 13778 states and 40937 transitions. [2021-08-21 12:07:24,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:24,919 INFO L276 IsEmpty]: Start isEmpty. Operand 13778 states and 40937 transitions. [2021-08-21 12:07:24,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:24,933 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:24,933 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:24,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:25,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-08-21 12:07:25,149 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:25,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:25,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1563871273, now seen corresponding path program 298 times [2021-08-21 12:07:25,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:25,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670806145] [2021-08-21 12:07:25,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:25,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:25,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:25,228 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:25,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:25,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670806145] [2021-08-21 12:07:25,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670806145] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:25,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010704104] [2021-08-21 12:07:25,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:07:25,229 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:25,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:25,229 INFO L229 MonitoredProcess]: Starting monitored process 300 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:25,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2021-08-21 12:07:27,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:07:27,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:27,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:27,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:27,369 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:27,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010704104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:27,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:27,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 12:07:27,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461030576] [2021-08-21 12:07:27,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:07:27,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:27,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:07:27,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:07:27,370 INFO L87 Difference]: Start difference. First operand 13778 states and 40937 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:27,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:27,617 INFO L93 Difference]: Finished difference Result 15029 states and 44016 transitions. [2021-08-21 12:07:27,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:07:27,618 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 22 [2021-08-21 12:07:27,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:27,646 INFO L225 Difference]: With dead ends: 15029 [2021-08-21 12:07:27,646 INFO L226 Difference]: Without dead ends: 15029 [2021-08-21 12:07:27,647 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 175.5ms TimeCoverageRelationStatistics Valid=323, Invalid=607, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:07:27,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15029 states. [2021-08-21 12:07:27,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15029 to 13800. [2021-08-21 12:07:27,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13800 states, 13799 states have (on average 2.9713747372998043) internal successors, (41002), 13799 states have internal predecessors, (41002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:27,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13800 states to 13800 states and 41002 transitions. [2021-08-21 12:07:27,891 INFO L78 Accepts]: Start accepts. Automaton has 13800 states and 41002 transitions. Word has length 22 [2021-08-21 12:07:27,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:27,891 INFO L470 AbstractCegarLoop]: Abstraction has 13800 states and 41002 transitions. [2021-08-21 12:07:27,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:27,891 INFO L276 IsEmpty]: Start isEmpty. Operand 13800 states and 41002 transitions. [2021-08-21 12:07:27,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:27,904 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:27,905 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:27,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:28,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable301,300 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:28,108 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:28,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:28,108 INFO L82 PathProgramCache]: Analyzing trace with hash -469779685, now seen corresponding path program 299 times [2021-08-21 12:07:28,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:28,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356328202] [2021-08-21 12:07:28,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:28,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:28,193 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:07:28,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:28,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356328202] [2021-08-21 12:07:28,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356328202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:28,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140397144] [2021-08-21 12:07:28,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:07:28,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:28,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:28,194 INFO L229 MonitoredProcess]: Starting monitored process 301 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:28,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2021-08-21 12:07:30,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:07:30,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:30,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:30,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:30,352 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:07:30,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140397144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:30,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:30,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 12:07:30,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505234343] [2021-08-21 12:07:30,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:07:30,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:30,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:07:30,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:07:30,353 INFO L87 Difference]: Start difference. First operand 13800 states and 41002 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:30,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:30,600 INFO L93 Difference]: Finished difference Result 17274 states and 50929 transitions. [2021-08-21 12:07:30,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:07:30,601 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 22 [2021-08-21 12:07:30,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:30,639 INFO L225 Difference]: With dead ends: 17274 [2021-08-21 12:07:30,639 INFO L226 Difference]: Without dead ends: 17274 [2021-08-21 12:07:30,639 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 171.8ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:07:30,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17274 states. [2021-08-21 12:07:30,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17274 to 16441. [2021-08-21 12:07:30,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16441 states, 16440 states have (on average 2.9762165450121656) internal successors, (48929), 16440 states have internal predecessors, (48929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:30,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16441 states to 16441 states and 48929 transitions. [2021-08-21 12:07:30,947 INFO L78 Accepts]: Start accepts. Automaton has 16441 states and 48929 transitions. Word has length 22 [2021-08-21 12:07:30,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:30,948 INFO L470 AbstractCegarLoop]: Abstraction has 16441 states and 48929 transitions. [2021-08-21 12:07:30,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:30,948 INFO L276 IsEmpty]: Start isEmpty. Operand 16441 states and 48929 transitions. [2021-08-21 12:07:30,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:30,962 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:30,962 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:30,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:31,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,301 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:31,184 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:31,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:31,184 INFO L82 PathProgramCache]: Analyzing trace with hash -912678825, now seen corresponding path program 300 times [2021-08-21 12:07:31,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:31,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404858190] [2021-08-21 12:07:31,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:31,184 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:31,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:31,273 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:31,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:31,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404858190] [2021-08-21 12:07:31,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404858190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:31,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468871282] [2021-08-21 12:07:31,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:07:31,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:31,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:31,274 INFO L229 MonitoredProcess]: Starting monitored process 302 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:31,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2021-08-21 12:07:33,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:07:33,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:33,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:33,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:33,408 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:33,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468871282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:33,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:33,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:07:33,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061897642] [2021-08-21 12:07:33,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:07:33,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:33,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:07:33,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:07:33,409 INFO L87 Difference]: Start difference. First operand 16441 states and 48929 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:33,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:33,624 INFO L93 Difference]: Finished difference Result 17077 states and 50426 transitions. [2021-08-21 12:07:33,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:07:33,624 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:33,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:33,660 INFO L225 Difference]: With dead ends: 17077 [2021-08-21 12:07:33,661 INFO L226 Difference]: Without dead ends: 17077 [2021-08-21 12:07:33,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 153.6ms TimeCoverageRelationStatistics Valid=246, Invalid=510, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:07:33,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17077 states. [2021-08-21 12:07:33,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17077 to 16382. [2021-08-21 12:07:33,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16382 states, 16381 states have (on average 2.97600879067212) internal successors, (48750), 16381 states have internal predecessors, (48750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:33,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16382 states to 16382 states and 48750 transitions. [2021-08-21 12:07:33,983 INFO L78 Accepts]: Start accepts. Automaton has 16382 states and 48750 transitions. Word has length 22 [2021-08-21 12:07:33,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:33,983 INFO L470 AbstractCegarLoop]: Abstraction has 16382 states and 48750 transitions. [2021-08-21 12:07:33,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:33,984 INFO L276 IsEmpty]: Start isEmpty. Operand 16382 states and 48750 transitions. [2021-08-21 12:07:33,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:33,999 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:33,999 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:34,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Ended with exit code 0 [2021-08-21 12:07:34,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-08-21 12:07:34,201 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:34,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:34,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1757650277, now seen corresponding path program 301 times [2021-08-21 12:07:34,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:34,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200487928] [2021-08-21 12:07:34,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:34,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:34,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:34,306 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:07:34,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:34,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200487928] [2021-08-21 12:07:34,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200487928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:34,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514702157] [2021-08-21 12:07:34,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:07:34,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:34,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:34,308 INFO L229 MonitoredProcess]: Starting monitored process 303 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:34,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2021-08-21 12:07:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:36,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:36,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:36,465 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:07:36,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514702157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:36,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:36,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:07:36,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46645912] [2021-08-21 12:07:36,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:07:36,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:36,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:07:36,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:07:36,466 INFO L87 Difference]: Start difference. First operand 16382 states and 48750 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:36,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:36,670 INFO L93 Difference]: Finished difference Result 18157 states and 53781 transitions. [2021-08-21 12:07:36,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:07:36,671 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:36,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:36,707 INFO L225 Difference]: With dead ends: 18157 [2021-08-21 12:07:36,707 INFO L226 Difference]: Without dead ends: 18157 [2021-08-21 12:07:36,707 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 154.3ms TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:07:36,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18157 states. [2021-08-21 12:07:36,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18157 to 17713. [2021-08-21 12:07:36,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17713 states, 17712 states have (on average 2.9783762420957545) internal successors, (52753), 17712 states have internal predecessors, (52753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:37,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17713 states to 17713 states and 52753 transitions. [2021-08-21 12:07:37,032 INFO L78 Accepts]: Start accepts. Automaton has 17713 states and 52753 transitions. Word has length 22 [2021-08-21 12:07:37,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:37,032 INFO L470 AbstractCegarLoop]: Abstraction has 17713 states and 52753 transitions. [2021-08-21 12:07:37,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:37,032 INFO L276 IsEmpty]: Start isEmpty. Operand 17713 states and 52753 transitions. [2021-08-21 12:07:37,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:37,049 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:37,050 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:37,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:37,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-08-21 12:07:37,272 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:37,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:37,272 INFO L82 PathProgramCache]: Analyzing trace with hash 2113005783, now seen corresponding path program 302 times [2021-08-21 12:07:37,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:37,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527203257] [2021-08-21 12:07:37,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:37,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:37,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:37,460 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:37,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:37,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527203257] [2021-08-21 12:07:37,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527203257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:37,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637210091] [2021-08-21 12:07:37,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:07:37,460 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:37,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:37,461 INFO L229 MonitoredProcess]: Starting monitored process 304 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:37,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2021-08-21 12:07:39,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:07:39,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:39,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:39,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:39,539 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:39,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637210091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:39,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:39,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:07:39,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812275328] [2021-08-21 12:07:39,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:39,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:39,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:39,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:39,540 INFO L87 Difference]: Start difference. First operand 17713 states and 52753 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:39,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:39,832 INFO L93 Difference]: Finished difference Result 18337 states and 54302 transitions. [2021-08-21 12:07:39,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:07:39,833 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-08-21 12:07:39,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:39,876 INFO L225 Difference]: With dead ends: 18337 [2021-08-21 12:07:39,876 INFO L226 Difference]: Without dead ends: 18337 [2021-08-21 12:07:39,876 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 210.4ms TimeCoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:07:39,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18337 states. [2021-08-21 12:07:40,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18337 to 17723. [2021-08-21 12:07:40,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17723 states, 17722 states have (on average 2.978332016702404) internal successors, (52782), 17722 states have internal predecessors, (52782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:40,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17723 states to 17723 states and 52782 transitions. [2021-08-21 12:07:40,315 INFO L78 Accepts]: Start accepts. Automaton has 17723 states and 52782 transitions. Word has length 22 [2021-08-21 12:07:40,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:40,315 INFO L470 AbstractCegarLoop]: Abstraction has 17723 states and 52782 transitions. [2021-08-21 12:07:40,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:40,315 INFO L276 IsEmpty]: Start isEmpty. Operand 17723 states and 52782 transitions. [2021-08-21 12:07:40,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:40,332 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:40,332 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:40,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:40,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,304 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:40,541 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:40,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:40,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1844259355, now seen corresponding path program 303 times [2021-08-21 12:07:40,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:40,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367494700] [2021-08-21 12:07:40,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:40,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:40,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:40,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367494700] [2021-08-21 12:07:40,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367494700] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:40,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184448882] [2021-08-21 12:07:40,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:07:40,665 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:40,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:40,666 INFO L229 MonitoredProcess]: Starting monitored process 305 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:40,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2021-08-21 12:07:42,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:07:42,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:42,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:42,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:42,739 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:42,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184448882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:42,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:42,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:07:42,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455259956] [2021-08-21 12:07:42,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:42,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:42,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:42,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:42,740 INFO L87 Difference]: Start difference. First operand 17723 states and 52782 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:43,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:43,210 INFO L93 Difference]: Finished difference Result 18782 states and 55642 transitions. [2021-08-21 12:07:43,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:07:43,210 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-08-21 12:07:43,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:43,251 INFO L225 Difference]: With dead ends: 18782 [2021-08-21 12:07:43,251 INFO L226 Difference]: Without dead ends: 18782 [2021-08-21 12:07:43,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 387.0ms TimeCoverageRelationStatistics Valid=527, Invalid=1033, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:07:43,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18782 states. [2021-08-21 12:07:43,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18782 to 17907. [2021-08-21 12:07:43,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17907 states, 17906 states have (on average 2.9786105216128673) internal successors, (53335), 17906 states have internal predecessors, (53335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:43,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17907 states to 17907 states and 53335 transitions. [2021-08-21 12:07:43,598 INFO L78 Accepts]: Start accepts. Automaton has 17907 states and 53335 transitions. Word has length 22 [2021-08-21 12:07:43,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:43,598 INFO L470 AbstractCegarLoop]: Abstraction has 17907 states and 53335 transitions. [2021-08-21 12:07:43,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:43,598 INFO L276 IsEmpty]: Start isEmpty. Operand 17907 states and 53335 transitions. [2021-08-21 12:07:43,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:07:43,616 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:43,616 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:43,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Ended with exit code 0 [2021-08-21 12:07:43,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2021-08-21 12:07:43,818 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:43,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:43,818 INFO L82 PathProgramCache]: Analyzing trace with hash 551211426, now seen corresponding path program 304 times [2021-08-21 12:07:43,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:43,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962431468] [2021-08-21 12:07:43,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:43,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:43,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:43,906 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:43,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:43,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962431468] [2021-08-21 12:07:43,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962431468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:43,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789516425] [2021-08-21 12:07:43,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:07:43,906 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:43,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:43,907 INFO L229 MonitoredProcess]: Starting monitored process 306 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:43,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2021-08-21 12:07:46,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:07:46,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:46,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:46,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:46,197 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:07:46,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789516425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:46,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:46,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-08-21 12:07:46,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575709077] [2021-08-21 12:07:46,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:07:46,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:46,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:07:46,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:07:46,198 INFO L87 Difference]: Start difference. First operand 17907 states and 53335 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:46,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:46,468 INFO L93 Difference]: Finished difference Result 18439 states and 54492 transitions. [2021-08-21 12:07:46,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:07:46,469 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:07:46,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:46,506 INFO L225 Difference]: With dead ends: 18439 [2021-08-21 12:07:46,506 INFO L226 Difference]: Without dead ends: 18431 [2021-08-21 12:07:46,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 147.6ms TimeCoverageRelationStatistics Valid=241, Invalid=515, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:07:46,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18431 states. [2021-08-21 12:07:46,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18431 to 17920. [2021-08-21 12:07:46,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17920 states, 17919 states have (on average 2.978123779228752) internal successors, (53365), 17919 states have internal predecessors, (53365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:46,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17920 states to 17920 states and 53365 transitions. [2021-08-21 12:07:46,848 INFO L78 Accepts]: Start accepts. Automaton has 17920 states and 53365 transitions. Word has length 23 [2021-08-21 12:07:46,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:46,848 INFO L470 AbstractCegarLoop]: Abstraction has 17920 states and 53365 transitions. [2021-08-21 12:07:46,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:46,848 INFO L276 IsEmpty]: Start isEmpty. Operand 17920 states and 53365 transitions. [2021-08-21 12:07:46,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:07:46,867 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:46,867 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:46,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:47,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,306 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:47,072 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:47,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:47,072 INFO L82 PathProgramCache]: Analyzing trace with hash 15548296, now seen corresponding path program 305 times [2021-08-21 12:07:47,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:47,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453068865] [2021-08-21 12:07:47,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:47,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:47,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:47,160 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 19 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:47,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:47,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453068865] [2021-08-21 12:07:47,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453068865] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:47,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96820403] [2021-08-21 12:07:47,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:07:47,160 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:47,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:47,161 INFO L229 MonitoredProcess]: Starting monitored process 307 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:47,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2021-08-21 12:07:49,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:07:49,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:49,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:07:49,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:49,346 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:49,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96820403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:49,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:49,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:07:49,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496954552] [2021-08-21 12:07:49,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:07:49,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:49,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:07:49,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:07:49,347 INFO L87 Difference]: Start difference. First operand 17920 states and 53365 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:49,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:49,574 INFO L93 Difference]: Finished difference Result 18193 states and 53786 transitions. [2021-08-21 12:07:49,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:07:49,574 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 23 [2021-08-21 12:07:49,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:49,608 INFO L225 Difference]: With dead ends: 18193 [2021-08-21 12:07:49,608 INFO L226 Difference]: Without dead ends: 18184 [2021-08-21 12:07:49,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 127.7ms TimeCoverageRelationStatistics Valid=234, Invalid=468, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:07:49,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18184 states. [2021-08-21 12:07:49,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18184 to 17894. [2021-08-21 12:07:49,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17894 states, 17893 states have (on average 2.9784832057229083) internal successors, (53294), 17893 states have internal predecessors, (53294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:49,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17894 states to 17894 states and 53294 transitions. [2021-08-21 12:07:49,937 INFO L78 Accepts]: Start accepts. Automaton has 17894 states and 53294 transitions. Word has length 23 [2021-08-21 12:07:49,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:49,937 INFO L470 AbstractCegarLoop]: Abstraction has 17894 states and 53294 transitions. [2021-08-21 12:07:49,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:49,937 INFO L276 IsEmpty]: Start isEmpty. Operand 17894 states and 53294 transitions. [2021-08-21 12:07:49,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:07:49,956 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:49,956 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:49,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:50,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2021-08-21 12:07:50,172 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:50,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:50,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1584889558, now seen corresponding path program 306 times [2021-08-21 12:07:50,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:50,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246329156] [2021-08-21 12:07:50,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:50,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:50,276 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:50,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:50,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246329156] [2021-08-21 12:07:50,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246329156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:50,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503626072] [2021-08-21 12:07:50,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:07:50,277 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:50,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:50,277 INFO L229 MonitoredProcess]: Starting monitored process 308 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:50,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2021-08-21 12:07:52,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:07:52,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:52,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:07:52,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:52,470 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:52,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503626072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:52,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:52,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:07:52,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737643513] [2021-08-21 12:07:52,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:07:52,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:52,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:07:52,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:07:52,471 INFO L87 Difference]: Start difference. First operand 17894 states and 53294 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:52,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:52,713 INFO L93 Difference]: Finished difference Result 18126 states and 53672 transitions. [2021-08-21 12:07:52,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:07:52,714 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:07:52,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:52,752 INFO L225 Difference]: With dead ends: 18126 [2021-08-21 12:07:52,752 INFO L226 Difference]: Without dead ends: 18118 [2021-08-21 12:07:52,752 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 152.0ms TimeCoverageRelationStatistics Valid=268, Invalid=544, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:07:52,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18118 states. [2021-08-21 12:07:53,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18118 to 17889. [2021-08-21 12:07:53,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17889 states, 17888 states have (on average 2.9781976744186047) internal successors, (53274), 17888 states have internal predecessors, (53274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:53,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17889 states to 17889 states and 53274 transitions. [2021-08-21 12:07:53,098 INFO L78 Accepts]: Start accepts. Automaton has 17889 states and 53274 transitions. Word has length 23 [2021-08-21 12:07:53,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:53,098 INFO L470 AbstractCegarLoop]: Abstraction has 17889 states and 53274 transitions. [2021-08-21 12:07:53,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:53,099 INFO L276 IsEmpty]: Start isEmpty. Operand 17889 states and 53274 transitions. [2021-08-21 12:07:53,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:07:53,118 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:53,119 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:53,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:53,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2021-08-21 12:07:53,321 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:53,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:53,321 INFO L82 PathProgramCache]: Analyzing trace with hash -659691760, now seen corresponding path program 307 times [2021-08-21 12:07:53,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:53,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952106677] [2021-08-21 12:07:53,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:53,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:53,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:53,393 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:07:53,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:53,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952106677] [2021-08-21 12:07:53,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952106677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:53,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506157912] [2021-08-21 12:07:53,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:07:53,393 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:53,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:53,394 INFO L229 MonitoredProcess]: Starting monitored process 309 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:53,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2021-08-21 12:07:55,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:55,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:07:55,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:07:55,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506157912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:55,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:55,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:07:55,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119428784] [2021-08-21 12:07:55,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:07:55,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:55,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:07:55,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:07:55,486 INFO L87 Difference]: Start difference. First operand 17889 states and 53274 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:55,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:55,629 INFO L93 Difference]: Finished difference Result 18257 states and 53865 transitions. [2021-08-21 12:07:55,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:07:55,629 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:07:55,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:55,671 INFO L225 Difference]: With dead ends: 18257 [2021-08-21 12:07:55,671 INFO L226 Difference]: Without dead ends: 18255 [2021-08-21 12:07:55,671 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=100, Invalid=140, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:07:55,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18255 states. [2021-08-21 12:07:55,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18255 to 17901. [2021-08-21 12:07:55,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17901 states, 17900 states have (on average 2.9777653631284915) internal successors, (53302), 17900 states have internal predecessors, (53302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:56,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17901 states to 17901 states and 53302 transitions. [2021-08-21 12:07:56,014 INFO L78 Accepts]: Start accepts. Automaton has 17901 states and 53302 transitions. Word has length 23 [2021-08-21 12:07:56,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:56,014 INFO L470 AbstractCegarLoop]: Abstraction has 17901 states and 53302 transitions. [2021-08-21 12:07:56,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:56,014 INFO L276 IsEmpty]: Start isEmpty. Operand 17901 states and 53302 transitions. [2021-08-21 12:07:56,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:07:56,032 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:56,032 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:56,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:56,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable310,309 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:56,255 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:56,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:56,255 INFO L82 PathProgramCache]: Analyzing trace with hash 254594030, now seen corresponding path program 308 times [2021-08-21 12:07:56,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:56,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265816055] [2021-08-21 12:07:56,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:56,255 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:56,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:56,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265816055] [2021-08-21 12:07:56,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265816055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:56,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021684974] [2021-08-21 12:07:56,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:07:56,326 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:56,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:56,327 INFO L229 MonitoredProcess]: Starting monitored process 310 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:56,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2021-08-21 12:07:58,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:07:58,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:58,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:58,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:58,536 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:07:58,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021684974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:58,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:58,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-08-21 12:07:58,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762562857] [2021-08-21 12:07:58,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:07:58,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:58,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:07:58,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:07:58,537 INFO L87 Difference]: Start difference. First operand 17901 states and 53302 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:58,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:58,701 INFO L93 Difference]: Finished difference Result 18340 states and 54026 transitions. [2021-08-21 12:07:58,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:07:58,701 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:07:58,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:58,742 INFO L225 Difference]: With dead ends: 18340 [2021-08-21 12:07:58,742 INFO L226 Difference]: Without dead ends: 18339 [2021-08-21 12:07:58,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:07:58,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18339 states. [2021-08-21 12:07:59,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18339 to 17894. [2021-08-21 12:07:59,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17894 states, 17893 states have (on average 2.9765830212932434) internal successors, (53260), 17893 states have internal predecessors, (53260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:59,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17894 states to 17894 states and 53260 transitions. [2021-08-21 12:07:59,104 INFO L78 Accepts]: Start accepts. Automaton has 17894 states and 53260 transitions. Word has length 23 [2021-08-21 12:07:59,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:59,104 INFO L470 AbstractCegarLoop]: Abstraction has 17894 states and 53260 transitions. [2021-08-21 12:07:59,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:59,104 INFO L276 IsEmpty]: Start isEmpty. Operand 17894 states and 53260 transitions. [2021-08-21 12:07:59,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:07:59,122 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:59,123 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:59,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:59,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2021-08-21 12:07:59,332 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:59,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:59,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1109900684, now seen corresponding path program 309 times [2021-08-21 12:07:59,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:59,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941313334] [2021-08-21 12:07:59,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:59,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:59,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:59,410 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:07:59,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:59,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941313334] [2021-08-21 12:07:59,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941313334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:59,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748518271] [2021-08-21 12:07:59,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:07:59,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:59,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:59,411 INFO L229 MonitoredProcess]: Starting monitored process 311 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:59,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2021-08-21 12:08:01,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:08:01,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:01,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:08:01,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:01,651 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:01,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748518271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:01,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:01,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 12:08:01,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726969075] [2021-08-21 12:08:01,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:08:01,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:01,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:08:01,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:08:01,652 INFO L87 Difference]: Start difference. First operand 17894 states and 53260 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:01,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:01,875 INFO L93 Difference]: Finished difference Result 18193 states and 53683 transitions. [2021-08-21 12:08:01,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:08:01,875 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 23 [2021-08-21 12:08:01,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:01,913 INFO L225 Difference]: With dead ends: 18193 [2021-08-21 12:08:01,913 INFO L226 Difference]: Without dead ends: 18188 [2021-08-21 12:08:01,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 109.8ms TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:08:01,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18188 states. [2021-08-21 12:08:02,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18188 to 17883. [2021-08-21 12:08:02,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17883 states, 17882 states have (on average 2.9751146404205344) internal successors, (53201), 17882 states have internal predecessors, (53201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:02,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17883 states to 17883 states and 53201 transitions. [2021-08-21 12:08:02,259 INFO L78 Accepts]: Start accepts. Automaton has 17883 states and 53201 transitions. Word has length 23 [2021-08-21 12:08:02,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:02,259 INFO L470 AbstractCegarLoop]: Abstraction has 17883 states and 53201 transitions. [2021-08-21 12:08:02,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:02,259 INFO L276 IsEmpty]: Start isEmpty. Operand 17883 states and 53201 transitions. [2021-08-21 12:08:02,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:08:02,277 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:02,277 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:02,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Ended with exit code 0 [2021-08-21 12:08:02,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 311 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-08-21 12:08:02,493 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:02,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:02,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1854603182, now seen corresponding path program 310 times [2021-08-21 12:08:02,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:02,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352922073] [2021-08-21 12:08:02,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:02,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:02,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:02,577 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:02,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:02,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352922073] [2021-08-21 12:08:02,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352922073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:02,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964947250] [2021-08-21 12:08:02,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:08:02,578 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:02,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:02,578 INFO L229 MonitoredProcess]: Starting monitored process 312 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:02,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2021-08-21 12:08:04,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:08:04,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:04,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:08:04,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:04,890 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:04,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964947250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:04,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:04,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-08-21 12:08:04,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367530172] [2021-08-21 12:08:04,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:08:04,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:04,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:08:04,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:08:04,891 INFO L87 Difference]: Start difference. First operand 17883 states and 53201 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:05,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:05,130 INFO L93 Difference]: Finished difference Result 18182 states and 53624 transitions. [2021-08-21 12:08:05,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:08:05,130 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:08:05,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:05,172 INFO L225 Difference]: With dead ends: 18182 [2021-08-21 12:08:05,172 INFO L226 Difference]: Without dead ends: 18172 [2021-08-21 12:08:05,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 122.5ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:08:05,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18172 states. [2021-08-21 12:08:05,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18172 to 17864. [2021-08-21 12:08:05,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17864 states, 17863 states have (on average 2.9740805015954765) internal successors, (53126), 17863 states have internal predecessors, (53126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:05,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17864 states to 17864 states and 53126 transitions. [2021-08-21 12:08:05,539 INFO L78 Accepts]: Start accepts. Automaton has 17864 states and 53126 transitions. Word has length 23 [2021-08-21 12:08:05,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:05,539 INFO L470 AbstractCegarLoop]: Abstraction has 17864 states and 53126 transitions. [2021-08-21 12:08:05,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:05,539 INFO L276 IsEmpty]: Start isEmpty. Operand 17864 states and 53126 transitions. [2021-08-21 12:08:05,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:08:05,557 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:05,557 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:05,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:05,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-08-21 12:08:05,780 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:05,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:05,780 INFO L82 PathProgramCache]: Analyzing trace with hash -829423156, now seen corresponding path program 311 times [2021-08-21 12:08:05,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:05,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120919409] [2021-08-21 12:08:05,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:05,780 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:05,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:05,868 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:05,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:05,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120919409] [2021-08-21 12:08:05,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120919409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:05,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344283034] [2021-08-21 12:08:05,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:08:05,868 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:05,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:05,869 INFO L229 MonitoredProcess]: Starting monitored process 313 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:05,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2021-08-21 12:08:08,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:08:08,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:08,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:08:08,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:08,062 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:08,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344283034] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:08,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:08,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:08:08,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438087925] [2021-08-21 12:08:08,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:08:08,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:08,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:08:08,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:08:08,063 INFO L87 Difference]: Start difference. First operand 17864 states and 53126 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:08,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:08,305 INFO L93 Difference]: Finished difference Result 19043 states and 55958 transitions. [2021-08-21 12:08:08,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:08:08,305 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 23 [2021-08-21 12:08:08,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:08,341 INFO L225 Difference]: With dead ends: 19043 [2021-08-21 12:08:08,341 INFO L226 Difference]: Without dead ends: 19037 [2021-08-21 12:08:08,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 125.7ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:08:08,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19037 states. [2021-08-21 12:08:08,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19037 to 17883. [2021-08-21 12:08:08,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17883 states, 17882 states have (on average 2.973604742198859) internal successors, (53174), 17882 states have internal predecessors, (53174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:08,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17883 states to 17883 states and 53174 transitions. [2021-08-21 12:08:08,676 INFO L78 Accepts]: Start accepts. Automaton has 17883 states and 53174 transitions. Word has length 23 [2021-08-21 12:08:08,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:08,676 INFO L470 AbstractCegarLoop]: Abstraction has 17883 states and 53174 transitions. [2021-08-21 12:08:08,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:08,676 INFO L276 IsEmpty]: Start isEmpty. Operand 17883 states and 53174 transitions. [2021-08-21 12:08:08,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:08:08,695 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:08,695 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:08,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:08,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,313 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:08,918 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:08,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:08,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1865106286, now seen corresponding path program 312 times [2021-08-21 12:08:08,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:08,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671514517] [2021-08-21 12:08:08,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:08,919 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:08,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:09,016 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:09,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:09,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671514517] [2021-08-21 12:08:09,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671514517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:09,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454338612] [2021-08-21 12:08:09,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:08:09,017 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:09,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:09,019 INFO L229 MonitoredProcess]: Starting monitored process 314 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:09,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2021-08-21 12:08:11,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:08:11,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:11,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:08:11,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:11,308 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:11,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454338612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:11,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:11,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:08:11,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119795847] [2021-08-21 12:08:11,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:08:11,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:11,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:08:11,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:08:11,309 INFO L87 Difference]: Start difference. First operand 17883 states and 53174 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:11,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:11,538 INFO L93 Difference]: Finished difference Result 19057 states and 55967 transitions. [2021-08-21 12:08:11,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:08:11,539 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:08:11,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:11,579 INFO L225 Difference]: With dead ends: 19057 [2021-08-21 12:08:11,579 INFO L226 Difference]: Without dead ends: 19049 [2021-08-21 12:08:11,579 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 133.9ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:08:11,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19049 states. [2021-08-21 12:08:11,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19049 to 17929. [2021-08-21 12:08:11,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17929 states, 17928 states have (on average 2.973170459616243) internal successors, (53303), 17928 states have internal predecessors, (53303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:11,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17929 states to 17929 states and 53303 transitions. [2021-08-21 12:08:11,925 INFO L78 Accepts]: Start accepts. Automaton has 17929 states and 53303 transitions. Word has length 23 [2021-08-21 12:08:11,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:11,925 INFO L470 AbstractCegarLoop]: Abstraction has 17929 states and 53303 transitions. [2021-08-21 12:08:11,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:11,925 INFO L276 IsEmpty]: Start isEmpty. Operand 17929 states and 53303 transitions. [2021-08-21 12:08:11,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:08:11,944 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:11,944 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:11,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Ended with exit code 0 [2021-08-21 12:08:12,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,314 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:12,167 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:12,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:12,167 INFO L82 PathProgramCache]: Analyzing trace with hash -503826932, now seen corresponding path program 313 times [2021-08-21 12:08:12,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:12,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977197090] [2021-08-21 12:08:12,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:12,167 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:12,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:12,266 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:12,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:12,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977197090] [2021-08-21 12:08:12,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977197090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:12,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2809381] [2021-08-21 12:08:12,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:08:12,266 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:12,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:12,267 INFO L229 MonitoredProcess]: Starting monitored process 315 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:12,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Waiting until timeout for monitored process [2021-08-21 12:08:14,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:14,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:08:14,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:14,521 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:14,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2809381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:14,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:14,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-08-21 12:08:14,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904332875] [2021-08-21 12:08:14,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:08:14,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:14,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:08:14,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:08:14,522 INFO L87 Difference]: Start difference. First operand 17929 states and 53303 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:14,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:14,770 INFO L93 Difference]: Finished difference Result 18559 states and 54701 transitions. [2021-08-21 12:08:14,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:08:14,771 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:08:14,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:14,814 INFO L225 Difference]: With dead ends: 18559 [2021-08-21 12:08:14,814 INFO L226 Difference]: Without dead ends: 18549 [2021-08-21 12:08:14,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 156.4ms TimeCoverageRelationStatistics Valid=257, Invalid=555, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:08:14,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18549 states. [2021-08-21 12:08:15,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18549 to 17929. [2021-08-21 12:08:15,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17929 states, 17928 states have (on average 2.9729473449352968) internal successors, (53299), 17928 states have internal predecessors, (53299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:15,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17929 states to 17929 states and 53299 transitions. [2021-08-21 12:08:15,158 INFO L78 Accepts]: Start accepts. Automaton has 17929 states and 53299 transitions. Word has length 23 [2021-08-21 12:08:15,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:15,158 INFO L470 AbstractCegarLoop]: Abstraction has 17929 states and 53299 transitions. [2021-08-21 12:08:15,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:15,158 INFO L276 IsEmpty]: Start isEmpty. Operand 17929 states and 53299 transitions. [2021-08-21 12:08:15,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:08:15,177 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:15,177 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:15,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:15,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-08-21 12:08:15,382 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:15,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:15,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1939669504, now seen corresponding path program 314 times [2021-08-21 12:08:15,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:15,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347440124] [2021-08-21 12:08:15,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:15,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:15,472 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:15,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:15,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347440124] [2021-08-21 12:08:15,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347440124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:15,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971945898] [2021-08-21 12:08:15,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:08:15,472 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:15,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:15,493 INFO L229 MonitoredProcess]: Starting monitored process 316 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:15,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Waiting until timeout for monitored process [2021-08-21 12:08:17,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:08:17,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:17,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:08:17,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:17,716 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:08:17,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971945898] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:17,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:17,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-08-21 12:08:17,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674993599] [2021-08-21 12:08:17,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:08:17,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:17,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:08:17,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:08:17,717 INFO L87 Difference]: Start difference. First operand 17929 states and 53299 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:17,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:17,949 INFO L93 Difference]: Finished difference Result 18230 states and 53758 transitions. [2021-08-21 12:08:17,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:08:17,950 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:08:17,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:17,988 INFO L225 Difference]: With dead ends: 18230 [2021-08-21 12:08:17,988 INFO L226 Difference]: Without dead ends: 18218 [2021-08-21 12:08:17,988 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 124.7ms TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:08:18,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18218 states. [2021-08-21 12:08:18,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18218 to 17886. [2021-08-21 12:08:18,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17886 states, 17885 states have (on average 2.9720995247414033) internal successors, (53156), 17885 states have internal predecessors, (53156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:18,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17886 states to 17886 states and 53156 transitions. [2021-08-21 12:08:18,341 INFO L78 Accepts]: Start accepts. Automaton has 17886 states and 53156 transitions. Word has length 23 [2021-08-21 12:08:18,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:18,341 INFO L470 AbstractCegarLoop]: Abstraction has 17886 states and 53156 transitions. [2021-08-21 12:08:18,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:18,341 INFO L276 IsEmpty]: Start isEmpty. Operand 17886 states and 53156 transitions. [2021-08-21 12:08:18,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:08:18,358 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:18,359 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:18,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:18,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,316 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:18,571 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:18,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:18,572 INFO L82 PathProgramCache]: Analyzing trace with hash 339231650, now seen corresponding path program 315 times [2021-08-21 12:08:18,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:18,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529932313] [2021-08-21 12:08:18,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:18,572 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:18,664 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:18,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:18,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529932313] [2021-08-21 12:08:18,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529932313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:18,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706615192] [2021-08-21 12:08:18,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:08:18,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:18,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:18,665 INFO L229 MonitoredProcess]: Starting monitored process 317 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:18,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Waiting until timeout for monitored process [2021-08-21 12:08:20,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:08:20,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:20,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:08:20,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:20,886 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:20,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706615192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:20,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:20,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:08:20,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354575225] [2021-08-21 12:08:20,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:08:20,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:20,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:08:20,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:08:20,887 INFO L87 Difference]: Start difference. First operand 17886 states and 53156 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:21,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:21,206 INFO L93 Difference]: Finished difference Result 18197 states and 53629 transitions. [2021-08-21 12:08:21,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:08:21,207 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:08:21,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:21,242 INFO L225 Difference]: With dead ends: 18197 [2021-08-21 12:08:21,242 INFO L226 Difference]: Without dead ends: 18185 [2021-08-21 12:08:21,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 137.0ms TimeCoverageRelationStatistics Valid=248, Invalid=508, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:08:21,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18185 states. [2021-08-21 12:08:21,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18185 to 17854. [2021-08-21 12:08:21,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17854 states, 17853 states have (on average 2.972105528482608) internal successors, (53061), 17853 states have internal predecessors, (53061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:21,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17854 states to 17854 states and 53061 transitions. [2021-08-21 12:08:21,575 INFO L78 Accepts]: Start accepts. Automaton has 17854 states and 53061 transitions. Word has length 23 [2021-08-21 12:08:21,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:21,576 INFO L470 AbstractCegarLoop]: Abstraction has 17854 states and 53061 transitions. [2021-08-21 12:08:21,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:21,576 INFO L276 IsEmpty]: Start isEmpty. Operand 17854 states and 53061 transitions. [2021-08-21 12:08:21,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:08:21,594 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:21,594 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:21,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:21,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,317 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:21,817 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:21,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:21,817 INFO L82 PathProgramCache]: Analyzing trace with hash -2029701568, now seen corresponding path program 316 times [2021-08-21 12:08:21,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:21,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999693572] [2021-08-21 12:08:21,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:21,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:21,914 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:21,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:21,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999693572] [2021-08-21 12:08:21,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999693572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:21,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044592420] [2021-08-21 12:08:21,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:08:21,915 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:21,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:21,917 INFO L229 MonitoredProcess]: Starting monitored process 318 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:21,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Waiting until timeout for monitored process [2021-08-21 12:08:24,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:08:24,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:24,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:08:24,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:24,066 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:24,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044592420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:24,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:24,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-08-21 12:08:24,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040589923] [2021-08-21 12:08:24,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:08:24,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:24,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:08:24,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:08:24,067 INFO L87 Difference]: Start difference. First operand 17854 states and 53061 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:24,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:24,328 INFO L93 Difference]: Finished difference Result 18612 states and 54753 transitions. [2021-08-21 12:08:24,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:08:24,329 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:08:24,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:24,369 INFO L225 Difference]: With dead ends: 18612 [2021-08-21 12:08:24,369 INFO L226 Difference]: Without dead ends: 18597 [2021-08-21 12:08:24,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 153.8ms TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:08:24,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18597 states. [2021-08-21 12:08:24,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18597 to 17841. [2021-08-21 12:08:24,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17841 states, 17840 states have (on average 2.972645739910314) internal successors, (53032), 17840 states have internal predecessors, (53032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:24,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17841 states to 17841 states and 53032 transitions. [2021-08-21 12:08:24,743 INFO L78 Accepts]: Start accepts. Automaton has 17841 states and 53032 transitions. Word has length 23 [2021-08-21 12:08:24,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:24,743 INFO L470 AbstractCegarLoop]: Abstraction has 17841 states and 53032 transitions. [2021-08-21 12:08:24,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:24,743 INFO L276 IsEmpty]: Start isEmpty. Operand 17841 states and 53032 transitions. [2021-08-21 12:08:24,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:08:24,761 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:24,761 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:24,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Ended with exit code 0 [2021-08-21 12:08:24,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,318 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:24,984 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:24,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:24,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1996519300, now seen corresponding path program 317 times [2021-08-21 12:08:24,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:24,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497332887] [2021-08-21 12:08:24,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:24,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:24,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:25,082 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:25,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:25,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497332887] [2021-08-21 12:08:25,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497332887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:25,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047661888] [2021-08-21 12:08:25,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:08:25,083 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:25,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:25,083 INFO L229 MonitoredProcess]: Starting monitored process 319 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:25,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Waiting until timeout for monitored process [2021-08-21 12:08:27,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:08:27,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:27,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:08:27,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:27,282 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:27,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047661888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:27,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:27,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:08:27,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568687504] [2021-08-21 12:08:27,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:08:27,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:27,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:08:27,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:08:27,283 INFO L87 Difference]: Start difference. First operand 17841 states and 53032 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:27,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:27,542 INFO L93 Difference]: Finished difference Result 18097 states and 53446 transitions. [2021-08-21 12:08:27,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:08:27,542 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 23 [2021-08-21 12:08:27,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:27,577 INFO L225 Difference]: With dead ends: 18097 [2021-08-21 12:08:27,577 INFO L226 Difference]: Without dead ends: 18087 [2021-08-21 12:08:27,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 156.5ms TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:08:27,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18087 states. [2021-08-21 12:08:27,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18087 to 17831. [2021-08-21 12:08:27,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17831 states, 17830 states have (on average 2.9722378014582165) internal successors, (52995), 17830 states have internal predecessors, (52995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:28,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17831 states to 17831 states and 52995 transitions. [2021-08-21 12:08:28,044 INFO L78 Accepts]: Start accepts. Automaton has 17831 states and 52995 transitions. Word has length 23 [2021-08-21 12:08:28,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:28,044 INFO L470 AbstractCegarLoop]: Abstraction has 17831 states and 52995 transitions. [2021-08-21 12:08:28,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:28,044 INFO L276 IsEmpty]: Start isEmpty. Operand 17831 states and 52995 transitions. [2021-08-21 12:08:28,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:08:28,063 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:28,063 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:28,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:28,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-08-21 12:08:28,267 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:28,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:28,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1416343236, now seen corresponding path program 318 times [2021-08-21 12:08:28,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:28,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378749415] [2021-08-21 12:08:28,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:28,267 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:28,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:28,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378749415] [2021-08-21 12:08:28,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378749415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:28,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724007929] [2021-08-21 12:08:28,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:08:28,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:28,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:28,339 INFO L229 MonitoredProcess]: Starting monitored process 320 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:28,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Waiting until timeout for monitored process [2021-08-21 12:08:30,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:08:30,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:30,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:08:30,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:08:30,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724007929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:30,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:30,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:08:30,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133877094] [2021-08-21 12:08:30,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:08:30,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:30,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:08:30,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:08:30,257 INFO L87 Difference]: Start difference. First operand 17831 states and 52995 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:30,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:30,391 INFO L93 Difference]: Finished difference Result 18142 states and 53472 transitions. [2021-08-21 12:08:30,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:08:30,392 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:08:30,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:30,437 INFO L225 Difference]: With dead ends: 18142 [2021-08-21 12:08:30,438 INFO L226 Difference]: Without dead ends: 18142 [2021-08-21 12:08:30,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:08:30,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18142 states. [2021-08-21 12:08:30,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18142 to 17832. [2021-08-21 12:08:30,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17832 states, 17831 states have (on average 2.972015030003926) internal successors, (52994), 17831 states have internal predecessors, (52994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:30,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17832 states to 17832 states and 52994 transitions. [2021-08-21 12:08:30,903 INFO L78 Accepts]: Start accepts. Automaton has 17832 states and 52994 transitions. Word has length 23 [2021-08-21 12:08:30,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:30,903 INFO L470 AbstractCegarLoop]: Abstraction has 17832 states and 52994 transitions. [2021-08-21 12:08:30,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:30,903 INFO L276 IsEmpty]: Start isEmpty. Operand 17832 states and 52994 transitions. [2021-08-21 12:08:30,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:08:30,922 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:30,922 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:30,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Ended with exit code 0 [2021-08-21 12:08:31,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-08-21 12:08:31,143 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:31,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:31,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1964338270, now seen corresponding path program 319 times [2021-08-21 12:08:31,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:31,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963436375] [2021-08-21 12:08:31,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:31,144 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:31,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:31,215 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:31,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:31,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963436375] [2021-08-21 12:08:31,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963436375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:31,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490811741] [2021-08-21 12:08:31,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:08:31,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:31,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:31,216 INFO L229 MonitoredProcess]: Starting monitored process 321 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:31,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Waiting until timeout for monitored process [2021-08-21 12:08:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:33,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:08:33,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:33,237 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:08:33,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490811741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:33,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:33,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-08-21 12:08:33,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164618582] [2021-08-21 12:08:33,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:08:33,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:33,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:08:33,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:08:33,237 INFO L87 Difference]: Start difference. First operand 17832 states and 52994 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:33,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:33,514 INFO L93 Difference]: Finished difference Result 18206 states and 53572 transitions. [2021-08-21 12:08:33,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:08:33,514 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:08:33,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:33,545 INFO L225 Difference]: With dead ends: 18206 [2021-08-21 12:08:33,545 INFO L226 Difference]: Without dead ends: 18205 [2021-08-21 12:08:33,545 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:08:33,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18205 states. [2021-08-21 12:08:33,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18205 to 17838. [2021-08-21 12:08:33,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17838 states, 17837 states have (on average 2.97118349498234) internal successors, (52997), 17837 states have internal predecessors, (52997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:33,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17838 states to 17838 states and 52997 transitions. [2021-08-21 12:08:33,877 INFO L78 Accepts]: Start accepts. Automaton has 17838 states and 52997 transitions. Word has length 23 [2021-08-21 12:08:33,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:33,877 INFO L470 AbstractCegarLoop]: Abstraction has 17838 states and 52997 transitions. [2021-08-21 12:08:33,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:33,877 INFO L276 IsEmpty]: Start isEmpty. Operand 17838 states and 52997 transitions. [2021-08-21 12:08:33,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:08:33,894 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:33,894 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:33,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Ended with exit code 0 [2021-08-21 12:08:34,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-08-21 12:08:34,116 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:34,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:34,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1109031616, now seen corresponding path program 320 times [2021-08-21 12:08:34,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:34,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920706123] [2021-08-21 12:08:34,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:34,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:34,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:34,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:34,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920706123] [2021-08-21 12:08:34,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920706123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:34,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5697438] [2021-08-21 12:08:34,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:08:34,194 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:34,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:34,194 INFO L229 MonitoredProcess]: Starting monitored process 322 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:34,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Waiting until timeout for monitored process [2021-08-21 12:08:36,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:08:36,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:36,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:08:36,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 33 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:36,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5697438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:36,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:36,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-08-21 12:08:36,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441268259] [2021-08-21 12:08:36,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:08:36,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:36,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:08:36,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:08:36,425 INFO L87 Difference]: Start difference. First operand 17838 states and 52997 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:36,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:36,646 INFO L93 Difference]: Finished difference Result 18139 states and 53422 transitions. [2021-08-21 12:08:36,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:08:36,647 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:08:36,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:36,687 INFO L225 Difference]: With dead ends: 18139 [2021-08-21 12:08:36,688 INFO L226 Difference]: Without dead ends: 18135 [2021-08-21 12:08:36,688 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:08:36,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18135 states. [2021-08-21 12:08:36,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18135 to 17822. [2021-08-21 12:08:37,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17822 states, 17821 states have (on average 2.9694181022389317) internal successors, (52918), 17821 states have internal predecessors, (52918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:37,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17822 states to 17822 states and 52918 transitions. [2021-08-21 12:08:37,048 INFO L78 Accepts]: Start accepts. Automaton has 17822 states and 52918 transitions. Word has length 23 [2021-08-21 12:08:37,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:37,048 INFO L470 AbstractCegarLoop]: Abstraction has 17822 states and 52918 transitions. [2021-08-21 12:08:37,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:37,048 INFO L276 IsEmpty]: Start isEmpty. Operand 17822 states and 52918 transitions. [2021-08-21 12:08:37,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:08:37,067 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:37,067 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:37,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:37,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-08-21 12:08:37,281 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:37,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:37,281 INFO L82 PathProgramCache]: Analyzing trace with hash -364329118, now seen corresponding path program 321 times [2021-08-21 12:08:37,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:37,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303038560] [2021-08-21 12:08:37,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:37,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:37,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:37,360 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:37,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:37,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303038560] [2021-08-21 12:08:37,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303038560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:37,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360865666] [2021-08-21 12:08:37,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:08:37,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:37,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:37,361 INFO L229 MonitoredProcess]: Starting monitored process 323 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:37,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Waiting until timeout for monitored process [2021-08-21 12:08:39,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:08:39,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:39,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:08:39,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:39,600 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:39,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360865666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:39,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:39,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 12:08:39,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114907375] [2021-08-21 12:08:39,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:08:39,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:39,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:08:39,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:08:39,601 INFO L87 Difference]: Start difference. First operand 17822 states and 52918 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:39,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:39,923 INFO L93 Difference]: Finished difference Result 18125 states and 53345 transitions. [2021-08-21 12:08:39,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:08:39,924 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 23 [2021-08-21 12:08:39,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:39,962 INFO L225 Difference]: With dead ends: 18125 [2021-08-21 12:08:39,962 INFO L226 Difference]: Without dead ends: 18117 [2021-08-21 12:08:39,962 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 117.2ms TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:08:39,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18117 states. [2021-08-21 12:08:40,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18117 to 17796. [2021-08-21 12:08:40,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17796 states, 17795 states have (on average 2.9681371171677435) internal successors, (52818), 17795 states have internal predecessors, (52818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:40,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17796 states to 17796 states and 52818 transitions. [2021-08-21 12:08:40,322 INFO L78 Accepts]: Start accepts. Automaton has 17796 states and 52818 transitions. Word has length 23 [2021-08-21 12:08:40,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:40,322 INFO L470 AbstractCegarLoop]: Abstraction has 17796 states and 52818 transitions. [2021-08-21 12:08:40,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:40,323 INFO L276 IsEmpty]: Start isEmpty. Operand 17796 states and 52818 transitions. [2021-08-21 12:08:40,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:08:40,342 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:40,342 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:40,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Ended with exit code 0 [2021-08-21 12:08:40,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,323 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:40,545 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:40,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:40,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1246611840, now seen corresponding path program 322 times [2021-08-21 12:08:40,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:40,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105323890] [2021-08-21 12:08:40,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:40,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:40,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:40,628 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:40,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:40,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105323890] [2021-08-21 12:08:40,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105323890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:40,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289041031] [2021-08-21 12:08:40,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:08:40,628 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:40,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:40,629 INFO L229 MonitoredProcess]: Starting monitored process 324 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:40,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Waiting until timeout for monitored process [2021-08-21 12:08:42,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:08:42,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:42,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:08:42,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:42,885 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:42,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289041031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:42,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:42,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-08-21 12:08:42,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800403348] [2021-08-21 12:08:42,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:08:42,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:42,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:08:42,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:08:42,886 INFO L87 Difference]: Start difference. First operand 17796 states and 52818 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:43,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:43,274 INFO L93 Difference]: Finished difference Result 18100 states and 53248 transitions. [2021-08-21 12:08:43,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:08:43,274 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:08:43,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:43,305 INFO L225 Difference]: With dead ends: 18100 [2021-08-21 12:08:43,305 INFO L226 Difference]: Without dead ends: 18091 [2021-08-21 12:08:43,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 140.3ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:08:43,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18091 states. [2021-08-21 12:08:43,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18091 to 17780. [2021-08-21 12:08:43,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17780 states, 17779 states have (on average 2.96760222734687) internal successors, (52761), 17779 states have internal predecessors, (52761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:43,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17780 states to 17780 states and 52761 transitions. [2021-08-21 12:08:43,631 INFO L78 Accepts]: Start accepts. Automaton has 17780 states and 52761 transitions. Word has length 23 [2021-08-21 12:08:43,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:43,631 INFO L470 AbstractCegarLoop]: Abstraction has 17780 states and 52761 transitions. [2021-08-21 12:08:43,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:43,632 INFO L276 IsEmpty]: Start isEmpty. Operand 17780 states and 52761 transitions. [2021-08-21 12:08:43,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:08:43,650 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:43,650 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:43,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:43,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,324 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:43,865 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:43,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:43,865 INFO L82 PathProgramCache]: Analyzing trace with hash -353826014, now seen corresponding path program 323 times [2021-08-21 12:08:43,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:43,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082784595] [2021-08-21 12:08:43,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:43,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:43,954 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:43,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:43,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082784595] [2021-08-21 12:08:43,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082784595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:43,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901620355] [2021-08-21 12:08:43,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:08:43,954 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:43,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:43,955 INFO L229 MonitoredProcess]: Starting monitored process 325 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:43,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Waiting until timeout for monitored process [2021-08-21 12:08:46,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:08:46,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:46,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:08:46,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:46,196 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:08:46,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901620355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:46,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:46,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-08-21 12:08:46,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8262913] [2021-08-21 12:08:46,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:08:46,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:46,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:08:46,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:08:46,197 INFO L87 Difference]: Start difference. First operand 17780 states and 52761 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:46,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:46,431 INFO L93 Difference]: Finished difference Result 19504 states and 57044 transitions. [2021-08-21 12:08:46,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:08:46,432 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:08:46,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:46,470 INFO L225 Difference]: With dead ends: 19504 [2021-08-21 12:08:46,470 INFO L226 Difference]: Without dead ends: 19496 [2021-08-21 12:08:46,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 139.0ms TimeCoverageRelationStatistics Valid=243, Invalid=513, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:08:46,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19496 states. [2021-08-21 12:08:46,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19496 to 17834. [2021-08-21 12:08:46,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17834 states, 17833 states have (on average 2.9666348903717825) internal successors, (52904), 17833 states have internal predecessors, (52904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:46,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17834 states to 17834 states and 52904 transitions. [2021-08-21 12:08:46,919 INFO L78 Accepts]: Start accepts. Automaton has 17834 states and 52904 transitions. Word has length 23 [2021-08-21 12:08:46,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:46,919 INFO L470 AbstractCegarLoop]: Abstraction has 17834 states and 52904 transitions. [2021-08-21 12:08:46,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:46,920 INFO L276 IsEmpty]: Start isEmpty. Operand 17834 states and 52904 transitions. [2021-08-21 12:08:46,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:08:46,938 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:46,938 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:46,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:47,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-08-21 12:08:47,161 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:47,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:47,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1572208064, now seen corresponding path program 324 times [2021-08-21 12:08:47,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:47,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910751341] [2021-08-21 12:08:47,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:47,162 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:47,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:47,257 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:47,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:47,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910751341] [2021-08-21 12:08:47,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910751341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:47,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647856483] [2021-08-21 12:08:47,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:08:47,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:47,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:47,258 INFO L229 MonitoredProcess]: Starting monitored process 326 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:47,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Waiting until timeout for monitored process [2021-08-21 12:08:49,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:08:49,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:49,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:08:49,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:49,494 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:49,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647856483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:49,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:49,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:08:49,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895489281] [2021-08-21 12:08:49,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:08:49,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:49,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:08:49,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:08:49,495 INFO L87 Difference]: Start difference. First operand 17834 states and 52904 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:49,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:49,844 INFO L93 Difference]: Finished difference Result 19523 states and 57060 transitions. [2021-08-21 12:08:49,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:08:49,845 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 23 [2021-08-21 12:08:49,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:49,885 INFO L225 Difference]: With dead ends: 19523 [2021-08-21 12:08:49,885 INFO L226 Difference]: Without dead ends: 19513 [2021-08-21 12:08:49,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 252.9ms TimeCoverageRelationStatistics Valid=278, Invalid=592, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:08:49,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19513 states. [2021-08-21 12:08:50,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19513 to 17911. [2021-08-21 12:08:50,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17911 states, 17910 states have (on average 2.9652707984366278) internal successors, (53108), 17910 states have internal predecessors, (53108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:50,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17911 states to 17911 states and 53108 transitions. [2021-08-21 12:08:50,230 INFO L78 Accepts]: Start accepts. Automaton has 17911 states and 53108 transitions. Word has length 23 [2021-08-21 12:08:50,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:50,230 INFO L470 AbstractCegarLoop]: Abstraction has 17911 states and 53108 transitions. [2021-08-21 12:08:50,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:50,230 INFO L276 IsEmpty]: Start isEmpty. Operand 17911 states and 53108 transitions. [2021-08-21 12:08:50,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:08:50,246 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:50,246 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:50,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:50,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,326 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:50,468 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:50,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:50,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1149722338, now seen corresponding path program 325 times [2021-08-21 12:08:50,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:50,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706675422] [2021-08-21 12:08:50,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:50,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:50,577 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:50,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:50,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706675422] [2021-08-21 12:08:50,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706675422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:50,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320326590] [2021-08-21 12:08:50,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:08:50,578 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:50,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:50,579 INFO L229 MonitoredProcess]: Starting monitored process 327 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:50,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Waiting until timeout for monitored process [2021-08-21 12:08:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:52,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:08:52,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:52,838 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:52,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320326590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:52,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:52,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-08-21 12:08:52,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589818060] [2021-08-21 12:08:52,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:08:52,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:52,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:08:52,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:08:52,839 INFO L87 Difference]: Start difference. First operand 17911 states and 53108 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:53,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:53,133 INFO L93 Difference]: Finished difference Result 18927 states and 55432 transitions. [2021-08-21 12:08:53,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:08:53,134 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:08:53,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:53,174 INFO L225 Difference]: With dead ends: 18927 [2021-08-21 12:08:53,174 INFO L226 Difference]: Without dead ends: 18915 [2021-08-21 12:08:53,174 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 200.6ms TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:08:53,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18915 states. [2021-08-21 12:08:53,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18915 to 17911. [2021-08-21 12:08:53,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17911 states, 17910 states have (on average 2.9649916247906196) internal successors, (53103), 17910 states have internal predecessors, (53103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:53,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17911 states to 17911 states and 53103 transitions. [2021-08-21 12:08:53,592 INFO L78 Accepts]: Start accepts. Automaton has 17911 states and 53103 transitions. Word has length 23 [2021-08-21 12:08:53,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:53,592 INFO L470 AbstractCegarLoop]: Abstraction has 17911 states and 53103 transitions. [2021-08-21 12:08:53,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:53,592 INFO L276 IsEmpty]: Start isEmpty. Operand 17911 states and 53103 transitions. [2021-08-21 12:08:53,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:08:53,609 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:53,609 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:53,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Ended with exit code 0 [2021-08-21 12:08:53,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,327 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:53,829 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:53,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:53,829 INFO L82 PathProgramCache]: Analyzing trace with hash -411299474, now seen corresponding path program 326 times [2021-08-21 12:08:53,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:53,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245514640] [2021-08-21 12:08:53,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:53,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:53,924 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:53,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:53,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245514640] [2021-08-21 12:08:53,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245514640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:53,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545706036] [2021-08-21 12:08:53,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:08:53,924 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:53,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:53,925 INFO L229 MonitoredProcess]: Starting monitored process 328 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:53,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Waiting until timeout for monitored process [2021-08-21 12:08:56,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:08:56,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:56,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:08:56,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:56,187 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:08:56,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545706036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:56,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:56,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-08-21 12:08:56,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120478670] [2021-08-21 12:08:56,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:08:56,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:56,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:08:56,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:08:56,188 INFO L87 Difference]: Start difference. First operand 17911 states and 53103 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:56,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:56,430 INFO L93 Difference]: Finished difference Result 18234 states and 53634 transitions. [2021-08-21 12:08:56,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:08:56,431 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:08:56,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:56,473 INFO L225 Difference]: With dead ends: 18234 [2021-08-21 12:08:56,473 INFO L226 Difference]: Without dead ends: 18222 [2021-08-21 12:08:56,473 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 134.3ms TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:08:56,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18222 states. [2021-08-21 12:08:56,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18222 to 17850. [2021-08-21 12:08:56,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17850 states, 17849 states have (on average 2.964255700599473) internal successors, (52909), 17849 states have internal predecessors, (52909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:56,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17850 states to 17850 states and 52909 transitions. [2021-08-21 12:08:56,839 INFO L78 Accepts]: Start accepts. Automaton has 17850 states and 52909 transitions. Word has length 23 [2021-08-21 12:08:56,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:56,839 INFO L470 AbstractCegarLoop]: Abstraction has 17850 states and 52909 transitions. [2021-08-21 12:08:56,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:56,839 INFO L276 IsEmpty]: Start isEmpty. Operand 17850 states and 52909 transitions. [2021-08-21 12:08:56,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:08:56,857 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:56,857 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:56,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:57,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 328 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable329 [2021-08-21 12:08:57,079 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:57,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:57,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1514734604, now seen corresponding path program 327 times [2021-08-21 12:08:57,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:57,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641068646] [2021-08-21 12:08:57,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:57,080 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:57,273 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:57,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:57,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641068646] [2021-08-21 12:08:57,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641068646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:57,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767550315] [2021-08-21 12:08:57,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:08:57,274 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:57,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:57,275 INFO L229 MonitoredProcess]: Starting monitored process 329 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:57,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Waiting until timeout for monitored process [2021-08-21 12:08:59,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:08:59,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:59,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:08:59,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:59,529 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:59,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767550315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:59,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:59,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-21 12:08:59,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781903415] [2021-08-21 12:08:59,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:08:59,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:59,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:08:59,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:08:59,530 INFO L87 Difference]: Start difference. First operand 17850 states and 52909 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:59,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:59,797 INFO L93 Difference]: Finished difference Result 18185 states and 53459 transitions. [2021-08-21 12:08:59,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:08:59,798 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 23 [2021-08-21 12:08:59,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:59,833 INFO L225 Difference]: With dead ends: 18185 [2021-08-21 12:08:59,833 INFO L226 Difference]: Without dead ends: 18175 [2021-08-21 12:08:59,833 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 163.3ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:08:59,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18175 states. [2021-08-21 12:09:00,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18175 to 17846. [2021-08-21 12:09:00,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17846 states, 17845 states have (on average 2.963967497898571) internal successors, (52892), 17845 states have internal predecessors, (52892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:00,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17846 states to 17846 states and 52892 transitions. [2021-08-21 12:09:00,198 INFO L78 Accepts]: Start accepts. Automaton has 17846 states and 52892 transitions. Word has length 23 [2021-08-21 12:09:00,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:00,198 INFO L470 AbstractCegarLoop]: Abstraction has 17846 states and 52892 transitions. [2021-08-21 12:09:00,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:00,198 INFO L276 IsEmpty]: Start isEmpty. Operand 17846 states and 52892 transitions. [2021-08-21 12:09:00,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:09:00,217 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:00,217 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:00,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Forceful destruction successful, exit code 0 [2021-08-21 12:09:00,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,329 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:00,433 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:00,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:00,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1092248878, now seen corresponding path program 328 times [2021-08-21 12:09:00,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:00,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552135146] [2021-08-21 12:09:00,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:00,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:00,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:00,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:00,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552135146] [2021-08-21 12:09:00,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552135146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:00,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685352546] [2021-08-21 12:09:00,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:09:00,558 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:00,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:00,559 INFO L229 MonitoredProcess]: Starting monitored process 330 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:00,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Waiting until timeout for monitored process [2021-08-21 12:09:02,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:09:02,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:02,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:09:02,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:02,926 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:09:02,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685352546] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:02,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:02,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-08-21 12:09:02,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661120869] [2021-08-21 12:09:02,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:09:02,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:02,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:09:02,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:09:02,929 INFO L87 Difference]: Start difference. First operand 17846 states and 52892 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:03,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:03,244 INFO L93 Difference]: Finished difference Result 18668 states and 54761 transitions. [2021-08-21 12:09:03,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:09:03,244 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:09:03,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:03,283 INFO L225 Difference]: With dead ends: 18668 [2021-08-21 12:09:03,284 INFO L226 Difference]: Without dead ends: 18656 [2021-08-21 12:09:03,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 204.7ms TimeCoverageRelationStatistics Valid=315, Invalid=677, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:09:03,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18656 states. [2021-08-21 12:09:03,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18656 to 17839. [2021-08-21 12:09:03,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17839 states, 17838 states have (on average 2.9639533579997757) internal successors, (52871), 17838 states have internal predecessors, (52871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:03,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17839 states to 17839 states and 52871 transitions. [2021-08-21 12:09:03,624 INFO L78 Accepts]: Start accepts. Automaton has 17839 states and 52871 transitions. Word has length 23 [2021-08-21 12:09:03,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:03,624 INFO L470 AbstractCegarLoop]: Abstraction has 17839 states and 52871 transitions. [2021-08-21 12:09:03,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:03,624 INFO L276 IsEmpty]: Start isEmpty. Operand 17839 states and 52871 transitions. [2021-08-21 12:09:03,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:09:03,643 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:03,643 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:03,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Ended with exit code 0 [2021-08-21 12:09:03,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-08-21 12:09:03,865 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:03,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:03,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1351044202, now seen corresponding path program 329 times [2021-08-21 12:09:03,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:03,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231050412] [2021-08-21 12:09:03,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:03,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:03,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:03,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:03,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231050412] [2021-08-21 12:09:03,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231050412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:03,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403243914] [2021-08-21 12:09:03,977 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:09:03,977 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:03,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:03,977 INFO L229 MonitoredProcess]: Starting monitored process 331 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:03,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Waiting until timeout for monitored process [2021-08-21 12:09:06,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:09:06,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:06,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:09:06,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:09:06,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403243914] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:06,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:06,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-08-21 12:09:06,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14745797] [2021-08-21 12:09:06,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:09:06,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:06,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:09:06,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:09:06,324 INFO L87 Difference]: Start difference. First operand 17839 states and 52871 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:06,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:06,577 INFO L93 Difference]: Finished difference Result 19225 states and 56136 transitions. [2021-08-21 12:09:06,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:09:06,578 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:09:06,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:06,625 INFO L225 Difference]: With dead ends: 19225 [2021-08-21 12:09:06,625 INFO L226 Difference]: Without dead ends: 19213 [2021-08-21 12:09:06,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 160.1ms TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:09:06,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19213 states. [2021-08-21 12:09:06,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19213 to 17839. [2021-08-21 12:09:06,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17839 states, 17838 states have (on average 2.9637851777105055) internal successors, (52868), 17838 states have internal predecessors, (52868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:06,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17839 states to 17839 states and 52868 transitions. [2021-08-21 12:09:06,956 INFO L78 Accepts]: Start accepts. Automaton has 17839 states and 52868 transitions. Word has length 23 [2021-08-21 12:09:06,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:06,956 INFO L470 AbstractCegarLoop]: Abstraction has 17839 states and 52868 transitions. [2021-08-21 12:09:06,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:06,956 INFO L276 IsEmpty]: Start isEmpty. Operand 17839 states and 52868 transitions. [2021-08-21 12:09:06,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:09:06,974 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:06,974 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:06,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Forceful destruction successful, exit code 0 [2021-08-21 12:09:07,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-08-21 12:09:07,189 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:07,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:07,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1348918672, now seen corresponding path program 330 times [2021-08-21 12:09:07,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:07,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903767511] [2021-08-21 12:09:07,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:07,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:07,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:07,269 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:09:07,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:07,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903767511] [2021-08-21 12:09:07,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903767511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:07,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905948857] [2021-08-21 12:09:07,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:09:07,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:07,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:07,270 INFO L229 MonitoredProcess]: Starting monitored process 332 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:07,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Waiting until timeout for monitored process [2021-08-21 12:09:09,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:09:09,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:09,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:09:09,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:09,644 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:09:09,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905948857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:09,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:09,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:09:09,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154542895] [2021-08-21 12:09:09,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:09:09,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:09,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:09:09,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:09:09,645 INFO L87 Difference]: Start difference. First operand 17839 states and 52868 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:09,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:09,767 INFO L93 Difference]: Finished difference Result 18168 states and 53356 transitions. [2021-08-21 12:09:09,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:09:09,767 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:09:09,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:09,805 INFO L225 Difference]: With dead ends: 18168 [2021-08-21 12:09:09,805 INFO L226 Difference]: Without dead ends: 18166 [2021-08-21 12:09:09,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:09:09,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18166 states. [2021-08-21 12:09:10,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18166 to 17831. [2021-08-21 12:09:10,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17831 states, 17830 states have (on average 2.963600673022995) internal successors, (52841), 17830 states have internal predecessors, (52841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:10,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17831 states to 17831 states and 52841 transitions. [2021-08-21 12:09:10,143 INFO L78 Accepts]: Start accepts. Automaton has 17831 states and 52841 transitions. Word has length 23 [2021-08-21 12:09:10,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:10,143 INFO L470 AbstractCegarLoop]: Abstraction has 17831 states and 52841 transitions. [2021-08-21 12:09:10,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:10,143 INFO L276 IsEmpty]: Start isEmpty. Operand 17831 states and 52841 transitions. [2021-08-21 12:09:10,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:09:10,161 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:10,161 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:10,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Forceful destruction successful, exit code 0 [2021-08-21 12:09:10,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable333,332 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:10,384 INFO L402 AbstractCegarLoop]: === Iteration 335 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:10,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:10,385 INFO L82 PathProgramCache]: Analyzing trace with hash -2031762834, now seen corresponding path program 331 times [2021-08-21 12:09:10,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:10,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038309376] [2021-08-21 12:09:10,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:10,385 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:10,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:10,485 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:10,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:10,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038309376] [2021-08-21 12:09:10,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038309376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:10,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768703835] [2021-08-21 12:09:10,486 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:09:10,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:10,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:10,486 INFO L229 MonitoredProcess]: Starting monitored process 333 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:10,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Waiting until timeout for monitored process [2021-08-21 12:09:12,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:12,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:09:12,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:12,759 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:09:12,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768703835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:12,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:12,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-08-21 12:09:12,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428293326] [2021-08-21 12:09:12,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:09:12,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:12,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:09:12,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:09:12,760 INFO L87 Difference]: Start difference. First operand 17831 states and 52841 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:12,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:12,978 INFO L93 Difference]: Finished difference Result 18143 states and 53272 transitions. [2021-08-21 12:09:12,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:09:12,978 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:09:12,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:13,015 INFO L225 Difference]: With dead ends: 18143 [2021-08-21 12:09:13,015 INFO L226 Difference]: Without dead ends: 18143 [2021-08-21 12:09:13,015 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:09:13,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18143 states. [2021-08-21 12:09:13,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18143 to 17815. [2021-08-21 12:09:13,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17815 states, 17814 states have (on average 2.9627820815089256) internal successors, (52779), 17814 states have internal predecessors, (52779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:13,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17815 states to 17815 states and 52779 transitions. [2021-08-21 12:09:13,372 INFO L78 Accepts]: Start accepts. Automaton has 17815 states and 52779 transitions. Word has length 23 [2021-08-21 12:09:13,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:13,372 INFO L470 AbstractCegarLoop]: Abstraction has 17815 states and 52779 transitions. [2021-08-21 12:09:13,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:13,372 INFO L276 IsEmpty]: Start isEmpty. Operand 17815 states and 52779 transitions. [2021-08-21 12:09:13,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:09:13,391 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:13,391 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:13,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Forceful destruction successful, exit code 0 [2021-08-21 12:09:13,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-08-21 12:09:13,605 INFO L402 AbstractCegarLoop]: === Iteration 336 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:13,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:13,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1176456180, now seen corresponding path program 332 times [2021-08-21 12:09:13,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:13,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291677269] [2021-08-21 12:09:13,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:13,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:13,698 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:09:13,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:13,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291677269] [2021-08-21 12:09:13,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291677269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:13,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890610027] [2021-08-21 12:09:13,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:09:13,699 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:13,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:13,700 INFO L229 MonitoredProcess]: Starting monitored process 334 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:13,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Waiting until timeout for monitored process [2021-08-21 12:09:15,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:09:15,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:15,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:09:15,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:16,001 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:09:16,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890610027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:16,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:16,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-08-21 12:09:16,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491912948] [2021-08-21 12:09:16,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:09:16,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:16,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:09:16,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:09:16,002 INFO L87 Difference]: Start difference. First operand 17815 states and 52779 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:16,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:16,220 INFO L93 Difference]: Finished difference Result 18132 states and 53222 transitions. [2021-08-21 12:09:16,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:09:16,221 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:09:16,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:16,259 INFO L225 Difference]: With dead ends: 18132 [2021-08-21 12:09:16,259 INFO L226 Difference]: Without dead ends: 18129 [2021-08-21 12:09:16,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:09:16,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18129 states. [2021-08-21 12:09:16,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18129 to 17806. [2021-08-21 12:09:16,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17806 states, 17805 states have (on average 2.96147149677057) internal successors, (52729), 17805 states have internal predecessors, (52729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:16,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17806 states to 17806 states and 52729 transitions. [2021-08-21 12:09:16,670 INFO L78 Accepts]: Start accepts. Automaton has 17806 states and 52729 transitions. Word has length 23 [2021-08-21 12:09:16,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:16,671 INFO L470 AbstractCegarLoop]: Abstraction has 17806 states and 52729 transitions. [2021-08-21 12:09:16,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:16,671 INFO L276 IsEmpty]: Start isEmpty. Operand 17806 states and 52729 transitions. [2021-08-21 12:09:16,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:09:16,688 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:16,688 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:16,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Ended with exit code 0 [2021-08-21 12:09:16,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-08-21 12:09:16,903 INFO L402 AbstractCegarLoop]: === Iteration 337 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:16,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:16,904 INFO L82 PathProgramCache]: Analyzing trace with hash -431753682, now seen corresponding path program 333 times [2021-08-21 12:09:16,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:16,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962854789] [2021-08-21 12:09:16,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:16,904 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:16,992 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:16,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:16,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962854789] [2021-08-21 12:09:16,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962854789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:16,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241466867] [2021-08-21 12:09:16,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:09:16,992 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:16,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:16,993 INFO L229 MonitoredProcess]: Starting monitored process 335 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:16,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Waiting until timeout for monitored process [2021-08-21 12:09:19,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:09:19,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:19,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:09:19,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:19,249 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:19,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241466867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:19,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:19,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:09:19,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933546604] [2021-08-21 12:09:19,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:09:19,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:19,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:09:19,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:09:19,250 INFO L87 Difference]: Start difference. First operand 17806 states and 52729 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:19,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:19,472 INFO L93 Difference]: Finished difference Result 18127 states and 53179 transitions. [2021-08-21 12:09:19,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:09:19,473 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 23 [2021-08-21 12:09:19,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:19,516 INFO L225 Difference]: With dead ends: 18127 [2021-08-21 12:09:19,516 INFO L226 Difference]: Without dead ends: 18123 [2021-08-21 12:09:19,516 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:09:19,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18123 states. [2021-08-21 12:09:19,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18123 to 17806. [2021-08-21 12:09:19,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17806 states, 17805 states have (on average 2.9601235607975287) internal successors, (52705), 17805 states have internal predecessors, (52705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:19,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17806 states to 17806 states and 52705 transitions. [2021-08-21 12:09:19,881 INFO L78 Accepts]: Start accepts. Automaton has 17806 states and 52705 transitions. Word has length 23 [2021-08-21 12:09:19,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:19,881 INFO L470 AbstractCegarLoop]: Abstraction has 17806 states and 52705 transitions. [2021-08-21 12:09:19,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:19,881 INFO L276 IsEmpty]: Start isEmpty. Operand 17806 states and 52705 transitions. [2021-08-21 12:09:19,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:09:19,899 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:19,899 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:19,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Forceful destruction successful, exit code 0 [2021-08-21 12:09:20,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2021-08-21 12:09:20,105 INFO L402 AbstractCegarLoop]: === Iteration 338 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:20,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:20,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1179187276, now seen corresponding path program 334 times [2021-08-21 12:09:20,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:20,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918315101] [2021-08-21 12:09:20,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:20,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:20,254 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:09:20,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:20,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918315101] [2021-08-21 12:09:20,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918315101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:20,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313534462] [2021-08-21 12:09:20,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:09:20,255 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:20,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:20,256 INFO L229 MonitoredProcess]: Starting monitored process 336 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:20,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Waiting until timeout for monitored process [2021-08-21 12:09:22,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:09:22,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:22,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:09:22,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:22,574 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:09:22,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313534462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:22,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:22,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-08-21 12:09:22,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678972091] [2021-08-21 12:09:22,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:09:22,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:22,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:09:22,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:09:22,575 INFO L87 Difference]: Start difference. First operand 17806 states and 52705 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:22,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:22,788 INFO L93 Difference]: Finished difference Result 20267 states and 59062 transitions. [2021-08-21 12:09:22,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:09:22,789 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:09:22,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:22,829 INFO L225 Difference]: With dead ends: 20267 [2021-08-21 12:09:22,829 INFO L226 Difference]: Without dead ends: 20261 [2021-08-21 12:09:22,829 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:09:22,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20261 states. [2021-08-21 12:09:23,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20261 to 17806. [2021-08-21 12:09:23,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17806 states, 17805 states have (on average 2.9597304128053916) internal successors, (52698), 17805 states have internal predecessors, (52698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:23,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17806 states to 17806 states and 52698 transitions. [2021-08-21 12:09:23,188 INFO L78 Accepts]: Start accepts. Automaton has 17806 states and 52698 transitions. Word has length 23 [2021-08-21 12:09:23,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:23,188 INFO L470 AbstractCegarLoop]: Abstraction has 17806 states and 52698 transitions. [2021-08-21 12:09:23,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:23,188 INFO L276 IsEmpty]: Start isEmpty. Operand 17806 states and 52698 transitions. [2021-08-21 12:09:23,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:09:23,205 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:23,205 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:23,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Forceful destruction successful, exit code 0 [2021-08-21 12:09:23,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 336 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-08-21 12:09:23,425 INFO L402 AbstractCegarLoop]: === Iteration 339 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:23,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:23,425 INFO L82 PathProgramCache]: Analyzing trace with hash -421250578, now seen corresponding path program 335 times [2021-08-21 12:09:23,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:23,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294948771] [2021-08-21 12:09:23,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:23,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:23,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:23,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:23,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294948771] [2021-08-21 12:09:23,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294948771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:23,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110706909] [2021-08-21 12:09:23,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:09:23,542 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:23,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:23,543 INFO L229 MonitoredProcess]: Starting monitored process 337 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:23,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Waiting until timeout for monitored process [2021-08-21 12:09:25,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:09:25,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:25,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:09:25,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:25,933 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:25,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110706909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:25,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:25,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:09:25,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731887143] [2021-08-21 12:09:25,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:09:25,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:25,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:09:25,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:09:25,934 INFO L87 Difference]: Start difference. First operand 17806 states and 52698 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:26,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:26,174 INFO L93 Difference]: Finished difference Result 20288 states and 59080 transitions. [2021-08-21 12:09:26,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:09:26,175 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:09:26,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:26,220 INFO L225 Difference]: With dead ends: 20288 [2021-08-21 12:09:26,220 INFO L226 Difference]: Without dead ends: 20280 [2021-08-21 12:09:26,221 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 146.6ms TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:09:26,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20280 states. [2021-08-21 12:09:26,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20280 to 17907. [2021-08-21 12:09:26,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17907 states, 17906 states have (on average 2.9607394169552106) internal successors, (53015), 17906 states have internal predecessors, (53015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:26,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17907 states to 17907 states and 53015 transitions. [2021-08-21 12:09:26,586 INFO L78 Accepts]: Start accepts. Automaton has 17907 states and 53015 transitions. Word has length 23 [2021-08-21 12:09:26,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:26,586 INFO L470 AbstractCegarLoop]: Abstraction has 17907 states and 53015 transitions. [2021-08-21 12:09:26,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:26,586 INFO L276 IsEmpty]: Start isEmpty. Operand 17907 states and 53015 transitions. [2021-08-21 12:09:26,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:09:26,604 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:26,604 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:26,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Ended with exit code 0 [2021-08-21 12:09:26,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,337 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:26,811 INFO L402 AbstractCegarLoop]: === Iteration 340 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:26,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:26,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1504783500, now seen corresponding path program 336 times [2021-08-21 12:09:26,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:26,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79417359] [2021-08-21 12:09:26,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:26,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:26,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:26,919 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:09:26,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:26,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79417359] [2021-08-21 12:09:26,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79417359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:26,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017140638] [2021-08-21 12:09:26,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:09:26,919 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:26,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:26,920 INFO L229 MonitoredProcess]: Starting monitored process 338 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:26,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Waiting until timeout for monitored process [2021-08-21 12:09:29,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:09:29,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:29,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:09:29,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:29,323 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:09:29,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017140638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:29,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:29,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:09:29,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462931630] [2021-08-21 12:09:29,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:09:29,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:29,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:09:29,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:09:29,323 INFO L87 Difference]: Start difference. First operand 17907 states and 53015 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:29,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:29,554 INFO L93 Difference]: Finished difference Result 20045 states and 58323 transitions. [2021-08-21 12:09:29,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:09:29,555 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:09:29,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:29,591 INFO L225 Difference]: With dead ends: 20045 [2021-08-21 12:09:29,591 INFO L226 Difference]: Without dead ends: 20035 [2021-08-21 12:09:29,591 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 160.9ms TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:09:29,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20035 states. [2021-08-21 12:09:29,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20035 to 17907. [2021-08-21 12:09:29,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17907 states, 17906 states have (on average 2.960571875349045) internal successors, (53012), 17906 states have internal predecessors, (53012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:29,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17907 states to 17907 states and 53012 transitions. [2021-08-21 12:09:29,905 INFO L78 Accepts]: Start accepts. Automaton has 17907 states and 53012 transitions. Word has length 23 [2021-08-21 12:09:29,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:29,905 INFO L470 AbstractCegarLoop]: Abstraction has 17907 states and 53012 transitions. [2021-08-21 12:09:29,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:29,905 INFO L276 IsEmpty]: Start isEmpty. Operand 17907 states and 53012 transitions. [2021-08-21 12:09:29,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:09:29,922 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:29,922 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:29,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Forceful destruction successful, exit code 0 [2021-08-21 12:09:30,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,338 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:30,144 INFO L402 AbstractCegarLoop]: === Iteration 341 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:30,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:30,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1082297774, now seen corresponding path program 337 times [2021-08-21 12:09:30,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:30,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198461354] [2021-08-21 12:09:30,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:30,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:30,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:30,254 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:30,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:30,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198461354] [2021-08-21 12:09:30,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198461354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:30,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637094860] [2021-08-21 12:09:30,255 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:09:30,255 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:30,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:30,255 INFO L229 MonitoredProcess]: Starting monitored process 339 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:30,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Waiting until timeout for monitored process [2021-08-21 12:09:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:32,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:09:32,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:32,682 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:09:32,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637094860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:32,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:32,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-08-21 12:09:32,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853893288] [2021-08-21 12:09:32,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:09:32,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:32,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:09:32,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:09:32,683 INFO L87 Difference]: Start difference. First operand 17907 states and 53012 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:32,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:32,966 INFO L93 Difference]: Finished difference Result 20068 states and 58346 transitions. [2021-08-21 12:09:32,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:09:32,967 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:09:32,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:33,000 INFO L225 Difference]: With dead ends: 20068 [2021-08-21 12:09:33,000 INFO L226 Difference]: Without dead ends: 20056 [2021-08-21 12:09:33,000 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 188.0ms TimeCoverageRelationStatistics Valid=297, Invalid=633, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:09:33,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20056 states. [2021-08-21 12:09:33,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20056 to 17916. [2021-08-21 12:09:33,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17916 states, 17915 states have (on average 2.9604242255093496) internal successors, (53036), 17915 states have internal predecessors, (53036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:33,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17916 states to 17916 states and 53036 transitions. [2021-08-21 12:09:33,321 INFO L78 Accepts]: Start accepts. Automaton has 17916 states and 53036 transitions. Word has length 23 [2021-08-21 12:09:33,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:33,321 INFO L470 AbstractCegarLoop]: Abstraction has 17916 states and 53036 transitions. [2021-08-21 12:09:33,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:33,321 INFO L276 IsEmpty]: Start isEmpty. Operand 17916 states and 53036 transitions. [2021-08-21 12:09:33,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:09:33,338 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:33,338 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:33,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Ended with exit code 0 [2021-08-21 12:09:33,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,339 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:33,560 INFO L402 AbstractCegarLoop]: === Iteration 342 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:33,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:33,561 INFO L82 PathProgramCache]: Analyzing trace with hash 870142156, now seen corresponding path program 338 times [2021-08-21 12:09:33,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:33,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326700356] [2021-08-21 12:09:33,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:33,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:33,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:33,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:33,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326700356] [2021-08-21 12:09:33,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326700356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:33,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033409247] [2021-08-21 12:09:33,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:09:33,677 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:33,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:33,678 INFO L229 MonitoredProcess]: Starting monitored process 340 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:33,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Waiting until timeout for monitored process [2021-08-21 12:09:36,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:09:36,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:36,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:09:36,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:36,120 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:09:36,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033409247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:36,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:36,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-08-21 12:09:36,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930437643] [2021-08-21 12:09:36,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:09:36,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:36,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:09:36,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:09:36,121 INFO L87 Difference]: Start difference. First operand 17916 states and 53036 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:36,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:36,464 INFO L93 Difference]: Finished difference Result 19013 states and 55552 transitions. [2021-08-21 12:09:36,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:09:36,464 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:09:36,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:36,497 INFO L225 Difference]: With dead ends: 19013 [2021-08-21 12:09:36,498 INFO L226 Difference]: Without dead ends: 18999 [2021-08-21 12:09:36,498 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 242.7ms TimeCoverageRelationStatistics Valid=384, Invalid=806, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:09:36,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18999 states. [2021-08-21 12:09:36,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18999 to 17916. [2021-08-21 12:09:36,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17916 states, 17915 states have (on average 2.9603125872174156) internal successors, (53034), 17915 states have internal predecessors, (53034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:36,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17916 states to 17916 states and 53034 transitions. [2021-08-21 12:09:36,798 INFO L78 Accepts]: Start accepts. Automaton has 17916 states and 53034 transitions. Word has length 23 [2021-08-21 12:09:36,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:36,799 INFO L470 AbstractCegarLoop]: Abstraction has 17916 states and 53034 transitions. [2021-08-21 12:09:36,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:36,799 INFO L276 IsEmpty]: Start isEmpty. Operand 17916 states and 53034 transitions. [2021-08-21 12:09:36,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:09:36,816 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:36,816 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:36,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Ended with exit code 0 [2021-08-21 12:09:37,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,340 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:37,033 INFO L402 AbstractCegarLoop]: === Iteration 343 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:37,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:37,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1868613790, now seen corresponding path program 339 times [2021-08-21 12:09:37,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:37,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873913568] [2021-08-21 12:09:37,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:37,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:37,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:37,128 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:37,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:37,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873913568] [2021-08-21 12:09:37,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873913568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:37,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125188035] [2021-08-21 12:09:37,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:09:37,129 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:37,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:37,133 INFO L229 MonitoredProcess]: Starting monitored process 341 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:37,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Waiting until timeout for monitored process [2021-08-21 12:09:39,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:09:39,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:39,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:09:39,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:39,608 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 43 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:09:39,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125188035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:39,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:39,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:09:39,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823110418] [2021-08-21 12:09:39,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:09:39,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:39,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:09:39,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:09:39,609 INFO L87 Difference]: Start difference. First operand 17916 states and 53034 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:39,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:39,809 INFO L93 Difference]: Finished difference Result 18057 states and 53239 transitions. [2021-08-21 12:09:39,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:09:39,810 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:09:39,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:39,846 INFO L225 Difference]: With dead ends: 18057 [2021-08-21 12:09:39,846 INFO L226 Difference]: Without dead ends: 18051 [2021-08-21 12:09:39,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 131.8ms TimeCoverageRelationStatistics Valid=223, Invalid=427, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:09:39,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18051 states. [2021-08-21 12:09:40,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18051 to 17856. [2021-08-21 12:09:40,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17856 states, 17855 states have (on average 2.959675161019322) internal successors, (52845), 17855 states have internal predecessors, (52845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:40,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17856 states to 17856 states and 52845 transitions. [2021-08-21 12:09:40,169 INFO L78 Accepts]: Start accepts. Automaton has 17856 states and 52845 transitions. Word has length 23 [2021-08-21 12:09:40,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:40,184 INFO L470 AbstractCegarLoop]: Abstraction has 17856 states and 52845 transitions. [2021-08-21 12:09:40,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:40,185 INFO L276 IsEmpty]: Start isEmpty. Operand 17856 states and 52845 transitions. [2021-08-21 12:09:40,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:09:40,210 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:40,210 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:40,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Forceful destruction successful, exit code 0 [2021-08-21 12:09:40,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable342,341 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:40,432 INFO L402 AbstractCegarLoop]: === Iteration 344 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:40,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:40,433 INFO L82 PathProgramCache]: Analyzing trace with hash -24836254, now seen corresponding path program 340 times [2021-08-21 12:09:40,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:40,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466293955] [2021-08-21 12:09:40,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:40,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:40,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:40,551 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:40,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:40,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466293955] [2021-08-21 12:09:40,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466293955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:40,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441382119] [2021-08-21 12:09:40,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:09:40,552 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:40,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:40,553 INFO L229 MonitoredProcess]: Starting monitored process 342 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:40,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Waiting until timeout for monitored process [2021-08-21 12:09:42,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:09:42,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:42,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:09:42,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:42,879 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 33 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:09:42,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441382119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:42,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:42,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-08-21 12:09:42,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699905066] [2021-08-21 12:09:42,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:09:42,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:42,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:09:42,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:09:42,880 INFO L87 Difference]: Start difference. First operand 17856 states and 52845 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:43,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:43,112 INFO L93 Difference]: Finished difference Result 18234 states and 53660 transitions. [2021-08-21 12:09:43,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:09:43,112 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:09:43,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:43,147 INFO L225 Difference]: With dead ends: 18234 [2021-08-21 12:09:43,147 INFO L226 Difference]: Without dead ends: 18222 [2021-08-21 12:09:43,148 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 165.7ms TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:09:43,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18222 states. [2021-08-21 12:09:43,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18222 to 17851. [2021-08-21 12:09:43,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17851 states, 17850 states have (on average 2.9588795518207283) internal successors, (52816), 17850 states have internal predecessors, (52816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:43,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17851 states to 17851 states and 52816 transitions. [2021-08-21 12:09:43,604 INFO L78 Accepts]: Start accepts. Automaton has 17851 states and 52816 transitions. Word has length 23 [2021-08-21 12:09:43,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:43,604 INFO L470 AbstractCegarLoop]: Abstraction has 17851 states and 52816 transitions. [2021-08-21 12:09:43,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:43,604 INFO L276 IsEmpty]: Start isEmpty. Operand 17851 states and 52816 transitions. [2021-08-21 12:09:43,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:09:43,622 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:43,622 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:43,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Forceful destruction successful, exit code 0 [2021-08-21 12:09:43,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-08-21 12:09:43,832 INFO L402 AbstractCegarLoop]: === Iteration 345 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:43,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:43,832 INFO L82 PathProgramCache]: Analyzing trace with hash -196693180, now seen corresponding path program 341 times [2021-08-21 12:09:43,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:43,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232263788] [2021-08-21 12:09:43,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:43,832 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:43,947 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:09:43,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:43,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232263788] [2021-08-21 12:09:43,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232263788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:43,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431888718] [2021-08-21 12:09:43,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:09:43,947 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:43,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:43,948 INFO L229 MonitoredProcess]: Starting monitored process 343 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:43,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Waiting until timeout for monitored process [2021-08-21 12:09:46,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:09:46,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:46,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:09:46,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:46,366 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:09:46,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431888718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:46,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:46,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:09:46,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190921850] [2021-08-21 12:09:46,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:09:46,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:46,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:09:46,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:09:46,367 INFO L87 Difference]: Start difference. First operand 17851 states and 52816 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:46,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:46,569 INFO L93 Difference]: Finished difference Result 18221 states and 53435 transitions. [2021-08-21 12:09:46,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:09:46,569 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 23 [2021-08-21 12:09:46,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:46,612 INFO L225 Difference]: With dead ends: 18221 [2021-08-21 12:09:46,612 INFO L226 Difference]: Without dead ends: 18212 [2021-08-21 12:09:46,612 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 131.5ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:09:46,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18212 states. [2021-08-21 12:09:47,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18212 to 17834. [2021-08-21 12:09:47,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17834 states, 17833 states have (on average 2.9576627600515897) internal successors, (52744), 17833 states have internal predecessors, (52744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:47,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17834 states to 17834 states and 52744 transitions. [2021-08-21 12:09:47,074 INFO L78 Accepts]: Start accepts. Automaton has 17834 states and 52744 transitions. Word has length 23 [2021-08-21 12:09:47,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:47,074 INFO L470 AbstractCegarLoop]: Abstraction has 17834 states and 52744 transitions. [2021-08-21 12:09:47,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:47,074 INFO L276 IsEmpty]: Start isEmpty. Operand 17834 states and 52744 transitions. [2021-08-21 12:09:47,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:09:47,094 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:47,094 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:47,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Ended with exit code 0 [2021-08-21 12:09:47,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-08-21 12:09:47,314 INFO L402 AbstractCegarLoop]: === Iteration 346 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:47,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:47,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1797131034, now seen corresponding path program 342 times [2021-08-21 12:09:47,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:47,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805407498] [2021-08-21 12:09:47,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:47,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:47,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:47,409 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:47,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:47,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805407498] [2021-08-21 12:09:47,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805407498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:47,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289652492] [2021-08-21 12:09:47,409 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:09:47,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:47,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:47,410 INFO L229 MonitoredProcess]: Starting monitored process 344 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:47,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Waiting until timeout for monitored process [2021-08-21 12:09:49,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:09:49,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:49,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:09:49,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:49,877 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:49,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289652492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:49,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:49,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:09:49,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515034784] [2021-08-21 12:09:49,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:09:49,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:49,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:09:49,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:09:49,878 INFO L87 Difference]: Start difference. First operand 17834 states and 52744 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:50,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:50,098 INFO L93 Difference]: Finished difference Result 18216 states and 53381 transitions. [2021-08-21 12:09:50,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:09:50,098 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:09:50,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:50,136 INFO L225 Difference]: With dead ends: 18216 [2021-08-21 12:09:50,136 INFO L226 Difference]: Without dead ends: 18208 [2021-08-21 12:09:50,136 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 130.1ms TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:09:50,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18208 states. [2021-08-21 12:09:50,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18208 to 17852. [2021-08-21 12:09:50,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17852 states, 17851 states have (on average 2.956417007450563) internal successors, (52775), 17851 states have internal predecessors, (52775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:50,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17852 states to 17852 states and 52775 transitions. [2021-08-21 12:09:50,503 INFO L78 Accepts]: Start accepts. Automaton has 17852 states and 52775 transitions. Word has length 23 [2021-08-21 12:09:50,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:50,503 INFO L470 AbstractCegarLoop]: Abstraction has 17852 states and 52775 transitions. [2021-08-21 12:09:50,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:50,503 INFO L276 IsEmpty]: Start isEmpty. Operand 17852 states and 52775 transitions. [2021-08-21 12:09:50,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:09:50,524 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:50,524 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:50,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Ended with exit code 0 [2021-08-21 12:09:50,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 344 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-08-21 12:09:50,728 INFO L402 AbstractCegarLoop]: === Iteration 347 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:50,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:50,728 INFO L82 PathProgramCache]: Analyzing trace with hash 128903044, now seen corresponding path program 343 times [2021-08-21 12:09:50,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:50,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737558986] [2021-08-21 12:09:50,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:50,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:50,839 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:09:50,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:50,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737558986] [2021-08-21 12:09:50,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737558986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:50,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333696472] [2021-08-21 12:09:50,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:09:50,840 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:50,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:50,840 INFO L229 MonitoredProcess]: Starting monitored process 345 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:50,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Waiting until timeout for monitored process [2021-08-21 12:09:53,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:53,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:09:53,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:53,225 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:09:53,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333696472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:53,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:53,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-08-21 12:09:53,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806309760] [2021-08-21 12:09:53,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:09:53,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:53,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:09:53,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:09:53,226 INFO L87 Difference]: Start difference. First operand 17852 states and 52775 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:53,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:53,476 INFO L93 Difference]: Finished difference Result 19957 states and 57817 transitions. [2021-08-21 12:09:53,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:09:53,476 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:09:53,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:53,516 INFO L225 Difference]: With dead ends: 19957 [2021-08-21 12:09:53,516 INFO L226 Difference]: Without dead ends: 19947 [2021-08-21 12:09:53,517 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 165.0ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:09:53,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19947 states. [2021-08-21 12:09:53,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19947 to 17901. [2021-08-21 12:09:53,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17901 states, 17900 states have (on average 2.955754189944134) internal successors, (52908), 17900 states have internal predecessors, (52908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:53,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17901 states to 17901 states and 52908 transitions. [2021-08-21 12:09:53,863 INFO L78 Accepts]: Start accepts. Automaton has 17901 states and 52908 transitions. Word has length 23 [2021-08-21 12:09:53,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:53,863 INFO L470 AbstractCegarLoop]: Abstraction has 17901 states and 52908 transitions. [2021-08-21 12:09:53,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:53,864 INFO L276 IsEmpty]: Start isEmpty. Operand 17901 states and 52908 transitions. [2021-08-21 12:09:53,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:09:53,883 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:53,883 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:53,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Ended with exit code 0 [2021-08-21 12:09:54,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,345 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:54,097 INFO L402 AbstractCegarLoop]: === Iteration 348 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:54,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:54,097 INFO L82 PathProgramCache]: Analyzing trace with hash -293582682, now seen corresponding path program 344 times [2021-08-21 12:09:54,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:54,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42680964] [2021-08-21 12:09:54,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:54,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:54,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:54,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42680964] [2021-08-21 12:09:54,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42680964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:54,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592223879] [2021-08-21 12:09:54,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:09:54,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:54,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:54,207 INFO L229 MonitoredProcess]: Starting monitored process 346 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:54,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Waiting until timeout for monitored process [2021-08-21 12:09:56,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:09:56,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:56,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:09:56,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 33 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:09:56,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592223879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:56,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:56,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-08-21 12:09:56,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679495056] [2021-08-21 12:09:56,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:09:56,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:56,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:09:56,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:09:56,677 INFO L87 Difference]: Start difference. First operand 17901 states and 52908 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:56,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:56,955 INFO L93 Difference]: Finished difference Result 19977 states and 57831 transitions. [2021-08-21 12:09:56,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:09:56,955 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:09:56,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:56,995 INFO L225 Difference]: With dead ends: 19977 [2021-08-21 12:09:56,995 INFO L226 Difference]: Without dead ends: 19965 [2021-08-21 12:09:56,995 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 185.7ms TimeCoverageRelationStatistics Valid=298, Invalid=632, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:09:57,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19965 states. [2021-08-21 12:09:57,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19965 to 17945. [2021-08-21 12:09:57,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17945 states, 17944 states have (on average 2.955082478823005) internal successors, (53026), 17944 states have internal predecessors, (53026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:57,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17945 states to 17945 states and 53026 transitions. [2021-08-21 12:09:57,353 INFO L78 Accepts]: Start accepts. Automaton has 17945 states and 53026 transitions. Word has length 23 [2021-08-21 12:09:57,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:57,353 INFO L470 AbstractCegarLoop]: Abstraction has 17945 states and 53026 transitions. [2021-08-21 12:09:57,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:57,353 INFO L276 IsEmpty]: Start isEmpty. Operand 17945 states and 53026 transitions. [2021-08-21 12:09:57,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:09:57,371 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:57,371 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:57,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Ended with exit code 0 [2021-08-21 12:09:57,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,346 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:57,585 INFO L402 AbstractCegarLoop]: === Iteration 349 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:57,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:57,585 INFO L82 PathProgramCache]: Analyzing trace with hash -505738300, now seen corresponding path program 345 times [2021-08-21 12:09:57,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:57,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300537598] [2021-08-21 12:09:57,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:57,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:57,697 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:57,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:57,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300537598] [2021-08-21 12:09:57,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300537598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:57,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060981028] [2021-08-21 12:09:57,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:09:57,698 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:57,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:57,698 INFO L229 MonitoredProcess]: Starting monitored process 347 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:57,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Waiting until timeout for monitored process [2021-08-21 12:10:00,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:10:00,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:10:00,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:10:00,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:00,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060981028] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:00,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:00,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-21 12:10:00,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210737901] [2021-08-21 12:10:00,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:10:00,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:00,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:10:00,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:10:00,116 INFO L87 Difference]: Start difference. First operand 17945 states and 53026 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:00,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:00,483 INFO L93 Difference]: Finished difference Result 19410 states and 56387 transitions. [2021-08-21 12:10:00,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:10:00,484 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 23 [2021-08-21 12:10:00,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:00,526 INFO L225 Difference]: With dead ends: 19410 [2021-08-21 12:10:00,526 INFO L226 Difference]: Without dead ends: 19396 [2021-08-21 12:10:00,526 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 222.8ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:10:00,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19396 states. [2021-08-21 12:10:00,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19396 to 17945. [2021-08-21 12:10:00,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17945 states, 17944 states have (on average 2.9548038341506913) internal successors, (53021), 17944 states have internal predecessors, (53021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:00,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17945 states to 17945 states and 53021 transitions. [2021-08-21 12:10:00,871 INFO L78 Accepts]: Start accepts. Automaton has 17945 states and 53021 transitions. Word has length 23 [2021-08-21 12:10:00,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:00,871 INFO L470 AbstractCegarLoop]: Abstraction has 17945 states and 53021 transitions. [2021-08-21 12:10:00,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:00,871 INFO L276 IsEmpty]: Start isEmpty. Operand 17945 states and 53021 transitions. [2021-08-21 12:10:00,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:10:00,890 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:00,890 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:00,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Forceful destruction successful, exit code 0 [2021-08-21 12:10:01,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2021-08-21 12:10:01,093 INFO L402 AbstractCegarLoop]: === Iteration 350 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:01,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:01,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1986257924, now seen corresponding path program 346 times [2021-08-21 12:10:01,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:01,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542845144] [2021-08-21 12:10:01,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:01,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:01,174 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:01,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:01,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542845144] [2021-08-21 12:10:01,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542845144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:01,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712093414] [2021-08-21 12:10:01,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:10:01,174 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:01,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:01,175 INFO L229 MonitoredProcess]: Starting monitored process 348 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:01,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Waiting until timeout for monitored process [2021-08-21 12:10:03,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:10:03,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:10:03,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:10:03,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 41 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:10:03,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712093414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:03,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:03,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:10:03,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117543802] [2021-08-21 12:10:03,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:10:03,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:03,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:10:03,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:10:03,546 INFO L87 Difference]: Start difference. First operand 17945 states and 53021 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:03,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:03,730 INFO L93 Difference]: Finished difference Result 18238 states and 53449 transitions. [2021-08-21 12:10:03,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:10:03,730 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:10:03,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:03,768 INFO L225 Difference]: With dead ends: 18238 [2021-08-21 12:10:03,768 INFO L226 Difference]: Without dead ends: 18234 [2021-08-21 12:10:03,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:10:03,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18234 states. [2021-08-21 12:10:04,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18234 to 17904. [2021-08-21 12:10:04,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17904 states, 17903 states have (on average 2.95403005082947) internal successors, (52886), 17903 states have internal predecessors, (52886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:04,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17904 states to 17904 states and 52886 transitions. [2021-08-21 12:10:04,202 INFO L78 Accepts]: Start accepts. Automaton has 17904 states and 52886 transitions. Word has length 23 [2021-08-21 12:10:04,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:04,202 INFO L470 AbstractCegarLoop]: Abstraction has 17904 states and 52886 transitions. [2021-08-21 12:10:04,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:04,202 INFO L276 IsEmpty]: Start isEmpty. Operand 17904 states and 52886 transitions. [2021-08-21 12:10:04,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:10:04,222 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:04,222 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:04,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Forceful destruction successful, exit code 0 [2021-08-21 12:10:04,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 348 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-08-21 12:10:04,442 INFO L402 AbstractCegarLoop]: === Iteration 351 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:04,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:04,443 INFO L82 PathProgramCache]: Analyzing trace with hash -276893760, now seen corresponding path program 347 times [2021-08-21 12:10:04,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:04,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116939388] [2021-08-21 12:10:04,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:04,443 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:04,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:04,542 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:10:04,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:04,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116939388] [2021-08-21 12:10:04,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116939388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:04,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467838631] [2021-08-21 12:10:04,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:10:04,542 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:04,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:04,543 INFO L229 MonitoredProcess]: Starting monitored process 349 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:04,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Waiting until timeout for monitored process [2021-08-21 12:10:06,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:10:06,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:10:06,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:10:06,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:10:06,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467838631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:06,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:06,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-08-21 12:10:06,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347702908] [2021-08-21 12:10:06,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:10:06,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:06,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:10:06,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:10:06,989 INFO L87 Difference]: Start difference. First operand 17904 states and 52886 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:07,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:07,221 INFO L93 Difference]: Finished difference Result 18303 states and 53547 transitions. [2021-08-21 12:10:07,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:10:07,221 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:10:07,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:07,258 INFO L225 Difference]: With dead ends: 18303 [2021-08-21 12:10:07,258 INFO L226 Difference]: Without dead ends: 18288 [2021-08-21 12:10:07,258 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 150.2ms TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:10:07,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18288 states. [2021-08-21 12:10:07,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18288 to 17851. [2021-08-21 12:10:07,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17851 states, 17850 states have (on average 2.952156862745098) internal successors, (52696), 17850 states have internal predecessors, (52696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:07,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17851 states to 17851 states and 52696 transitions. [2021-08-21 12:10:07,683 INFO L78 Accepts]: Start accepts. Automaton has 17851 states and 52696 transitions. Word has length 23 [2021-08-21 12:10:07,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:07,683 INFO L470 AbstractCegarLoop]: Abstraction has 17851 states and 52696 transitions. [2021-08-21 12:10:07,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:07,683 INFO L276 IsEmpty]: Start isEmpty. Operand 17851 states and 52696 transitions. [2021-08-21 12:10:07,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:10:07,702 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:07,702 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:07,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Forceful destruction successful, exit code 0 [2021-08-21 12:10:07,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,349 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:07,924 INFO L402 AbstractCegarLoop]: === Iteration 352 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:07,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:07,924 INFO L82 PathProgramCache]: Analyzing trace with hash -699379486, now seen corresponding path program 348 times [2021-08-21 12:10:07,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:07,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313048452] [2021-08-21 12:10:07,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:07,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:07,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:08,033 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:08,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:08,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313048452] [2021-08-21 12:10:08,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313048452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:08,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799387835] [2021-08-21 12:10:08,034 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:10:08,034 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:08,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:08,034 INFO L229 MonitoredProcess]: Starting monitored process 350 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:08,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Waiting until timeout for monitored process [2021-08-21 12:10:10,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:10:10,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:10:10,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:10:10,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:10,459 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:10,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799387835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:10,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:10,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-21 12:10:10,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776873356] [2021-08-21 12:10:10,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:10:10,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:10,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:10:10,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:10:10,460 INFO L87 Difference]: Start difference. First operand 17851 states and 52696 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:10,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:10,706 INFO L93 Difference]: Finished difference Result 18254 states and 53364 transitions. [2021-08-21 12:10:10,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:10:10,706 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 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 23 [2021-08-21 12:10:10,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:10,740 INFO L225 Difference]: With dead ends: 18254 [2021-08-21 12:10:10,740 INFO L226 Difference]: Without dead ends: 18242 [2021-08-21 12:10:10,741 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 169.0ms TimeCoverageRelationStatistics Valid=297, Invalid=633, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:10:10,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18242 states. [2021-08-21 12:10:11,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18242 to 17822. [2021-08-21 12:10:11,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17822 states, 17821 states have (on average 2.9505078278435555) internal successors, (52581), 17821 states have internal predecessors, (52581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:11,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17822 states to 17822 states and 52581 transitions. [2021-08-21 12:10:11,099 INFO L78 Accepts]: Start accepts. Automaton has 17822 states and 52581 transitions. Word has length 23 [2021-08-21 12:10:11,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:11,099 INFO L470 AbstractCegarLoop]: Abstraction has 17822 states and 52581 transitions. [2021-08-21 12:10:11,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:11,100 INFO L276 IsEmpty]: Start isEmpty. Operand 17822 states and 52581 transitions. [2021-08-21 12:10:11,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:10:11,118 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:11,118 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:11,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Forceful destruction successful, exit code 0 [2021-08-21 12:10:11,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,350 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:11,325 INFO L402 AbstractCegarLoop]: === Iteration 353 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:11,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:11,325 INFO L82 PathProgramCache]: Analyzing trace with hash -911535104, now seen corresponding path program 349 times [2021-08-21 12:10:11,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:11,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831054372] [2021-08-21 12:10:11,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:11,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:11,509 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:11,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:11,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831054372] [2021-08-21 12:10:11,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831054372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:11,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973987070] [2021-08-21 12:10:11,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:10:11,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:11,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:11,510 INFO L229 MonitoredProcess]: Starting monitored process 351 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:11,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Waiting until timeout for monitored process [2021-08-21 12:10:13,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:13,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:10:13,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:13,946 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:10:13,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973987070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:13,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:13,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-08-21 12:10:13,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36397453] [2021-08-21 12:10:13,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:10:13,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:13,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:10:13,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:10:13,946 INFO L87 Difference]: Start difference. First operand 17822 states and 52581 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:14,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:14,258 INFO L93 Difference]: Finished difference Result 18751 states and 54725 transitions. [2021-08-21 12:10:14,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:10:14,259 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:10:14,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:14,293 INFO L225 Difference]: With dead ends: 18751 [2021-08-21 12:10:14,293 INFO L226 Difference]: Without dead ends: 18737 [2021-08-21 12:10:14,294 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 236.0ms TimeCoverageRelationStatistics Valid=378, Invalid=812, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:10:14,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18737 states. [2021-08-21 12:10:14,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18737 to 17823. [2021-08-21 12:10:14,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17823 states, 17822 states have (on average 2.950061721467849) internal successors, (52576), 17822 states have internal predecessors, (52576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:14,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17823 states to 17823 states and 52576 transitions. [2021-08-21 12:10:14,631 INFO L78 Accepts]: Start accepts. Automaton has 17823 states and 52576 transitions. Word has length 23 [2021-08-21 12:10:14,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:14,631 INFO L470 AbstractCegarLoop]: Abstraction has 17823 states and 52576 transitions. [2021-08-21 12:10:14,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:14,632 INFO L276 IsEmpty]: Start isEmpty. Operand 17823 states and 52576 transitions. [2021-08-21 12:10:14,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:10:14,650 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:14,650 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:14,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Forceful destruction successful, exit code 0 [2021-08-21 12:10:14,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,351 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:14,866 INFO L402 AbstractCegarLoop]: === Iteration 354 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:14,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:14,866 INFO L82 PathProgramCache]: Analyzing trace with hash -521790686, now seen corresponding path program 350 times [2021-08-21 12:10:14,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:14,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729613729] [2021-08-21 12:10:14,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:14,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:14,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:14,944 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:14,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:14,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729613729] [2021-08-21 12:10:14,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729613729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:14,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864207716] [2021-08-21 12:10:14,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:10:14,945 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:14,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:14,946 INFO L229 MonitoredProcess]: Starting monitored process 352 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:14,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Waiting until timeout for monitored process [2021-08-21 12:10:17,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:10:17,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:10:17,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:10:17,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:17,453 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:10:17,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864207716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:17,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:17,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 12:10:17,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401843913] [2021-08-21 12:10:17,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:10:17,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:17,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:10:17,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:10:17,454 INFO L87 Difference]: Start difference. First operand 17823 states and 52576 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:17,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:17,591 INFO L93 Difference]: Finished difference Result 18203 states and 53172 transitions. [2021-08-21 12:10:17,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:10:17,592 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:10:17,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:17,623 INFO L225 Difference]: With dead ends: 18203 [2021-08-21 12:10:17,623 INFO L226 Difference]: Without dead ends: 18203 [2021-08-21 12:10:17,623 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:10:17,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18203 states. [2021-08-21 12:10:17,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18203 to 17826. [2021-08-21 12:10:17,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17826 states, 17825 states have (on average 2.950070126227209) internal successors, (52585), 17825 states have internal predecessors, (52585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:17,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17826 states to 17826 states and 52585 transitions. [2021-08-21 12:10:17,954 INFO L78 Accepts]: Start accepts. Automaton has 17826 states and 52585 transitions. Word has length 23 [2021-08-21 12:10:17,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:17,954 INFO L470 AbstractCegarLoop]: Abstraction has 17826 states and 52585 transitions. [2021-08-21 12:10:17,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:17,954 INFO L276 IsEmpty]: Start isEmpty. Operand 17826 states and 52585 transitions. [2021-08-21 12:10:17,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:10:17,970 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:17,970 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:17,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Forceful destruction successful, exit code 0 [2021-08-21 12:10:18,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 352 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-08-21 12:10:18,193 INFO L402 AbstractCegarLoop]: === Iteration 355 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:18,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:18,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1478814652, now seen corresponding path program 351 times [2021-08-21 12:10:18,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:18,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904853303] [2021-08-21 12:10:18,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:18,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:18,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:18,305 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:18,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:18,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904853303] [2021-08-21 12:10:18,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904853303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:18,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853638629] [2021-08-21 12:10:18,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:10:18,306 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:18,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:18,306 INFO L229 MonitoredProcess]: Starting monitored process 353 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:18,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Waiting until timeout for monitored process [2021-08-21 12:10:20,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:10:20,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:10:20,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:10:20,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:20,829 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:20,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853638629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:20,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:20,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-21 12:10:20,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102533035] [2021-08-21 12:10:20,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:10:20,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:20,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:10:20,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:10:20,829 INFO L87 Difference]: Start difference. First operand 17826 states and 52585 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:21,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:21,070 INFO L93 Difference]: Finished difference Result 19582 states and 56773 transitions. [2021-08-21 12:10:21,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:10:21,071 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 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 23 [2021-08-21 12:10:21,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:21,107 INFO L225 Difference]: With dead ends: 19582 [2021-08-21 12:10:21,107 INFO L226 Difference]: Without dead ends: 19568 [2021-08-21 12:10:21,108 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 184.8ms TimeCoverageRelationStatistics Valid=318, Invalid=674, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:10:21,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19568 states. [2021-08-21 12:10:21,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19568 to 17857. [2021-08-21 12:10:21,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17857 states, 17856 states have (on average 2.9487567204301075) internal successors, (52653), 17856 states have internal predecessors, (52653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:21,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17857 states to 17857 states and 52653 transitions. [2021-08-21 12:10:21,420 INFO L78 Accepts]: Start accepts. Automaton has 17857 states and 52653 transitions. Word has length 23 [2021-08-21 12:10:21,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:21,420 INFO L470 AbstractCegarLoop]: Abstraction has 17857 states and 52653 transitions. [2021-08-21 12:10:21,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:21,420 INFO L276 IsEmpty]: Start isEmpty. Operand 17857 states and 52653 transitions. [2021-08-21 12:10:21,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:10:21,437 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:21,437 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:21,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Forceful destruction successful, exit code 0 [2021-08-21 12:10:21,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-08-21 12:10:21,657 INFO L402 AbstractCegarLoop]: === Iteration 356 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:21,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:21,658 INFO L82 PathProgramCache]: Analyzing trace with hash -741242812, now seen corresponding path program 352 times [2021-08-21 12:10:21,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:21,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305401668] [2021-08-21 12:10:21,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:21,658 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:21,733 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:21,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:21,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305401668] [2021-08-21 12:10:21,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305401668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:21,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450612199] [2021-08-21 12:10:21,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:10:21,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:21,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:21,734 INFO L229 MonitoredProcess]: Starting monitored process 354 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:21,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Waiting until timeout for monitored process [2021-08-21 12:10:24,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:10:24,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:10:24,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:10:24,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 37 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:10:24,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450612199] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:24,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:24,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:10:24,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71651894] [2021-08-21 12:10:24,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:10:24,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:24,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:10:24,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:10:24,264 INFO L87 Difference]: Start difference. First operand 17857 states and 52653 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:24,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:24,390 INFO L93 Difference]: Finished difference Result 18291 states and 53326 transitions. [2021-08-21 12:10:24,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:10:24,391 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:10:24,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:24,433 INFO L225 Difference]: With dead ends: 18291 [2021-08-21 12:10:24,433 INFO L226 Difference]: Without dead ends: 18291 [2021-08-21 12:10:24,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 50.2ms TimeCoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:10:24,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18291 states. [2021-08-21 12:10:24,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18291 to 17867. [2021-08-21 12:10:24,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17867 states, 17866 states have (on average 2.94928915258032) internal successors, (52692), 17866 states have internal predecessors, (52692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:24,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17867 states to 17867 states and 52692 transitions. [2021-08-21 12:10:24,772 INFO L78 Accepts]: Start accepts. Automaton has 17867 states and 52692 transitions. Word has length 23 [2021-08-21 12:10:24,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:24,772 INFO L470 AbstractCegarLoop]: Abstraction has 17867 states and 52692 transitions. [2021-08-21 12:10:24,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:24,772 INFO L276 IsEmpty]: Start isEmpty. Operand 17867 states and 52692 transitions. [2021-08-21 12:10:24,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:10:24,790 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:24,790 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:24,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Forceful destruction successful, exit code 0 [2021-08-21 12:10:25,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 354 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-08-21 12:10:25,005 INFO L402 AbstractCegarLoop]: === Iteration 357 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:25,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:25,005 INFO L82 PathProgramCache]: Analyzing trace with hash 173042978, now seen corresponding path program 353 times [2021-08-21 12:10:25,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:25,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959678545] [2021-08-21 12:10:25,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:25,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:25,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:25,081 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 41 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:10:25,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:25,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959678545] [2021-08-21 12:10:25,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959678545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:25,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035027818] [2021-08-21 12:10:25,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:10:25,081 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:25,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:25,082 INFO L229 MonitoredProcess]: Starting monitored process 355 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:25,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Waiting until timeout for monitored process [2021-08-21 12:10:27,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:10:27,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:10:27,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:10:27,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:27,671 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:10:27,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035027818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:27,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:27,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-08-21 12:10:27,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754191551] [2021-08-21 12:10:27,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:10:27,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:27,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:10:27,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:10:27,672 INFO L87 Difference]: Start difference. First operand 17867 states and 52692 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:27,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:27,788 INFO L93 Difference]: Finished difference Result 18207 states and 53152 transitions. [2021-08-21 12:10:27,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:10:27,788 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:10:27,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:27,823 INFO L225 Difference]: With dead ends: 18207 [2021-08-21 12:10:27,823 INFO L226 Difference]: Without dead ends: 18207 [2021-08-21 12:10:27,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:10:27,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18207 states. [2021-08-21 12:10:28,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18207 to 17866. [2021-08-21 12:10:28,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17866 states, 17865 states have (on average 2.9491183879093197) internal successors, (52686), 17865 states have internal predecessors, (52686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:28,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17866 states to 17866 states and 52686 transitions. [2021-08-21 12:10:28,167 INFO L78 Accepts]: Start accepts. Automaton has 17866 states and 52686 transitions. Word has length 23 [2021-08-21 12:10:28,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:28,167 INFO L470 AbstractCegarLoop]: Abstraction has 17866 states and 52686 transitions. [2021-08-21 12:10:28,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:28,167 INFO L276 IsEmpty]: Start isEmpty. Operand 17866 states and 52686 transitions. [2021-08-21 12:10:28,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:10:28,185 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:28,185 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:28,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Forceful destruction successful, exit code 0 [2021-08-21 12:10:28,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2021-08-21 12:10:28,409 INFO L402 AbstractCegarLoop]: === Iteration 358 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:28,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:28,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1028349632, now seen corresponding path program 354 times [2021-08-21 12:10:28,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:28,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183741208] [2021-08-21 12:10:28,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:28,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:28,491 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 35 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:28,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:28,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183741208] [2021-08-21 12:10:28,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183741208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:28,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138023752] [2021-08-21 12:10:28,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:10:28,491 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:28,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:28,493 INFO L229 MonitoredProcess]: Starting monitored process 356 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:28,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Waiting until timeout for monitored process [2021-08-21 12:10:31,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:10:31,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:10:31,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:10:31,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:31,060 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 35 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:31,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138023752] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:31,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:31,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 12:10:31,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927077303] [2021-08-21 12:10:31,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:10:31,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:31,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:10:31,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:10:31,061 INFO L87 Difference]: Start difference. First operand 17866 states and 52686 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:31,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:31,266 INFO L93 Difference]: Finished difference Result 18209 states and 53154 transitions. [2021-08-21 12:10:31,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:10:31,266 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 23 [2021-08-21 12:10:31,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:31,309 INFO L225 Difference]: With dead ends: 18209 [2021-08-21 12:10:31,309 INFO L226 Difference]: Without dead ends: 18207 [2021-08-21 12:10:31,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:10:31,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18207 states. [2021-08-21 12:10:31,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18207 to 17866. [2021-08-21 12:10:31,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17866 states, 17865 states have (on average 2.9487825356842987) internal successors, (52680), 17865 states have internal predecessors, (52680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:31,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17866 states to 17866 states and 52680 transitions. [2021-08-21 12:10:31,663 INFO L78 Accepts]: Start accepts. Automaton has 17866 states and 52680 transitions. Word has length 23 [2021-08-21 12:10:31,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:31,663 INFO L470 AbstractCegarLoop]: Abstraction has 17866 states and 52680 transitions. [2021-08-21 12:10:31,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:31,663 INFO L276 IsEmpty]: Start isEmpty. Operand 17866 states and 52680 transitions. [2021-08-21 12:10:31,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:10:31,681 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:31,681 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:31,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Ended with exit code 0 [2021-08-21 12:10:31,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,356 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:31,904 INFO L402 AbstractCegarLoop]: === Iteration 359 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:31,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:31,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1773052130, now seen corresponding path program 355 times [2021-08-21 12:10:31,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:31,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678256825] [2021-08-21 12:10:31,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:31,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:31,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:31,987 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:10:31,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:31,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678256825] [2021-08-21 12:10:31,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678256825] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:31,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845341338] [2021-08-21 12:10:31,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:10:31,987 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:31,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:31,988 INFO L229 MonitoredProcess]: Starting monitored process 357 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:31,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Waiting until timeout for monitored process [2021-08-21 12:10:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:34,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:10:34,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:34,593 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:10:34,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845341338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:34,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:34,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-08-21 12:10:34,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313700719] [2021-08-21 12:10:34,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:10:34,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:34,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:10:34,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:10:34,594 INFO L87 Difference]: Start difference. First operand 17866 states and 52680 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:34,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:34,808 INFO L93 Difference]: Finished difference Result 18215 states and 53156 transitions. [2021-08-21 12:10:34,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:10:34,809 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:10:34,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:34,843 INFO L225 Difference]: With dead ends: 18215 [2021-08-21 12:10:34,843 INFO L226 Difference]: Without dead ends: 18211 [2021-08-21 12:10:34,844 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:10:34,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18211 states. [2021-08-21 12:10:35,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18211 to 17866. [2021-08-21 12:10:35,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17866 states, 17865 states have (on average 2.947774979009236) internal successors, (52662), 17865 states have internal predecessors, (52662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:35,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17866 states to 17866 states and 52662 transitions. [2021-08-21 12:10:35,190 INFO L78 Accepts]: Start accepts. Automaton has 17866 states and 52662 transitions. Word has length 23 [2021-08-21 12:10:35,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:35,190 INFO L470 AbstractCegarLoop]: Abstraction has 17866 states and 52662 transitions. [2021-08-21 12:10:35,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:35,190 INFO L276 IsEmpty]: Start isEmpty. Operand 17866 states and 52662 transitions. [2021-08-21 12:10:35,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:10:35,209 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:35,209 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:35,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Forceful destruction successful, exit code 0 [2021-08-21 12:10:35,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2021-08-21 12:10:35,425 INFO L402 AbstractCegarLoop]: === Iteration 360 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:35,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:35,425 INFO L82 PathProgramCache]: Analyzing trace with hash -910974208, now seen corresponding path program 356 times [2021-08-21 12:10:35,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:35,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271090212] [2021-08-21 12:10:35,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:35,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:35,528 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:35,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:35,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271090212] [2021-08-21 12:10:35,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271090212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:35,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89644689] [2021-08-21 12:10:35,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:10:35,529 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:35,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:35,529 INFO L229 MonitoredProcess]: Starting monitored process 358 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:35,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Waiting until timeout for monitored process [2021-08-21 12:10:37,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:10:37,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:10:37,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:10:37,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:38,001 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 33 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:10:38,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89644689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:38,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:38,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-08-21 12:10:38,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248842679] [2021-08-21 12:10:38,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:10:38,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:38,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:10:38,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:10:38,002 INFO L87 Difference]: Start difference. First operand 17866 states and 52662 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:38,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:38,231 INFO L93 Difference]: Finished difference Result 18224 states and 53151 transitions. [2021-08-21 12:10:38,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:10:38,232 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:10:38,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:38,399 INFO L225 Difference]: With dead ends: 18224 [2021-08-21 12:10:38,399 INFO L226 Difference]: Without dead ends: 18218 [2021-08-21 12:10:38,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 140.7ms TimeCoverageRelationStatistics Valid=233, Invalid=469, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:10:38,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18218 states. [2021-08-21 12:10:38,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18218 to 17866. [2021-08-21 12:10:38,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17866 states, 17865 states have (on average 2.9462636439966414) internal successors, (52635), 17865 states have internal predecessors, (52635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:38,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17866 states to 17866 states and 52635 transitions. [2021-08-21 12:10:38,671 INFO L78 Accepts]: Start accepts. Automaton has 17866 states and 52635 transitions. Word has length 23 [2021-08-21 12:10:38,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:38,671 INFO L470 AbstractCegarLoop]: Abstraction has 17866 states and 52635 transitions. [2021-08-21 12:10:38,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:38,671 INFO L276 IsEmpty]: Start isEmpty. Operand 17866 states and 52635 transitions. [2021-08-21 12:10:38,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:10:38,687 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:38,687 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:38,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Forceful destruction successful, exit code 0 [2021-08-21 12:10:38,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359,358 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:38,901 INFO L402 AbstractCegarLoop]: === Iteration 361 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:38,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:38,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1783555234, now seen corresponding path program 357 times [2021-08-21 12:10:38,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:38,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729563749] [2021-08-21 12:10:38,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:38,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:38,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:10:38,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:38,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729563749] [2021-08-21 12:10:38,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729563749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:38,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625122941] [2021-08-21 12:10:38,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:10:38,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:38,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:38,989 INFO L229 MonitoredProcess]: Starting monitored process 359 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:38,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Waiting until timeout for monitored process [2021-08-21 12:10:41,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:10:41,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:10:41,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:10:41,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:41,601 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:10:41,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625122941] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:41,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:41,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:10:41,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044115035] [2021-08-21 12:10:41,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:10:41,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:41,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:10:41,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:10:41,609 INFO L87 Difference]: Start difference. First operand 17866 states and 52635 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:41,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:41,842 INFO L93 Difference]: Finished difference Result 20833 states and 60305 transitions. [2021-08-21 12:10:41,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:10:41,842 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:10:41,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:41,889 INFO L225 Difference]: With dead ends: 20833 [2021-08-21 12:10:41,889 INFO L226 Difference]: Without dead ends: 20825 [2021-08-21 12:10:41,889 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 136.8ms TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:10:41,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20825 states. [2021-08-21 12:10:42,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20825 to 17890. [2021-08-21 12:10:42,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17890 states, 17889 states have (on average 2.9460562356755546) internal successors, (52702), 17889 states have internal predecessors, (52702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:42,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17890 states to 17890 states and 52702 transitions. [2021-08-21 12:10:42,269 INFO L78 Accepts]: Start accepts. Automaton has 17890 states and 52702 transitions. Word has length 23 [2021-08-21 12:10:42,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:42,269 INFO L470 AbstractCegarLoop]: Abstraction has 17890 states and 52702 transitions. [2021-08-21 12:10:42,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:42,269 INFO L276 IsEmpty]: Start isEmpty. Operand 17890 states and 52702 transitions. [2021-08-21 12:10:42,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:10:42,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:42,290 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:42,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Forceful destruction successful, exit code 0 [2021-08-21 12:10:42,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,359 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:42,509 INFO L402 AbstractCegarLoop]: === Iteration 362 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:42,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:42,509 INFO L82 PathProgramCache]: Analyzing trace with hash -585377984, now seen corresponding path program 358 times [2021-08-21 12:10:42,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:42,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786615635] [2021-08-21 12:10:42,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:42,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:42,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:42,609 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:42,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:42,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786615635] [2021-08-21 12:10:42,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786615635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:42,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525194597] [2021-08-21 12:10:42,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:10:42,609 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:42,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:42,610 INFO L229 MonitoredProcess]: Starting monitored process 360 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:42,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Waiting until timeout for monitored process [2021-08-21 12:10:45,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:10:45,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:10:45,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:10:45,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:45,228 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:10:45,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525194597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:45,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:45,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-08-21 12:10:45,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032424101] [2021-08-21 12:10:45,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:10:45,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:45,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:10:45,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:10:45,229 INFO L87 Difference]: Start difference. First operand 17890 states and 52702 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:45,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:45,484 INFO L93 Difference]: Finished difference Result 20861 states and 60333 transitions. [2021-08-21 12:10:45,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:10:45,484 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:10:45,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:45,530 INFO L225 Difference]: With dead ends: 20861 [2021-08-21 12:10:45,530 INFO L226 Difference]: Without dead ends: 20851 [2021-08-21 12:10:45,530 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 157.5ms TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:10:45,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20851 states. [2021-08-21 12:10:45,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20851 to 18012. [2021-08-21 12:10:45,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18012 states, 18011 states have (on average 2.9463105879740157) internal successors, (53066), 18011 states have internal predecessors, (53066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:45,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18012 states to 18012 states and 53066 transitions. [2021-08-21 12:10:45,920 INFO L78 Accepts]: Start accepts. Automaton has 18012 states and 53066 transitions. Word has length 23 [2021-08-21 12:10:45,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:45,921 INFO L470 AbstractCegarLoop]: Abstraction has 18012 states and 53066 transitions. [2021-08-21 12:10:45,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:45,921 INFO L276 IsEmpty]: Start isEmpty. Operand 18012 states and 53066 transitions. [2021-08-21 12:10:45,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:10:45,940 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:45,941 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:45,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Forceful destruction successful, exit code 0 [2021-08-21 12:10:46,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,360 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:46,164 INFO L402 AbstractCegarLoop]: === Iteration 363 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:46,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:46,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1007863710, now seen corresponding path program 359 times [2021-08-21 12:10:46,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:46,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942967755] [2021-08-21 12:10:46,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:46,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:46,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:46,270 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:10:46,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:46,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942967755] [2021-08-21 12:10:46,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942967755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:46,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43475117] [2021-08-21 12:10:46,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:10:46,270 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:46,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:46,271 INFO L229 MonitoredProcess]: Starting monitored process 361 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:46,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Waiting until timeout for monitored process [2021-08-21 12:10:48,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:10:48,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:10:48,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:10:48,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:48,836 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:10:48,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43475117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:48,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:48,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-08-21 12:10:48,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206097089] [2021-08-21 12:10:48,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:10:48,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:48,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:10:48,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:10:48,837 INFO L87 Difference]: Start difference. First operand 18012 states and 53066 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:49,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:49,142 INFO L93 Difference]: Finished difference Result 20740 states and 59909 transitions. [2021-08-21 12:10:49,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:10:49,143 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:10:49,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:49,191 INFO L225 Difference]: With dead ends: 20740 [2021-08-21 12:10:49,191 INFO L226 Difference]: Without dead ends: 20728 [2021-08-21 12:10:49,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 200.9ms TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:10:49,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20728 states. [2021-08-21 12:10:49,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20728 to 18020. [2021-08-21 12:10:49,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18020 states, 18019 states have (on average 2.9461124368721903) internal successors, (53086), 18019 states have internal predecessors, (53086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:49,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18020 states to 18020 states and 53086 transitions. [2021-08-21 12:10:49,586 INFO L78 Accepts]: Start accepts. Automaton has 18020 states and 53086 transitions. Word has length 23 [2021-08-21 12:10:49,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:49,586 INFO L470 AbstractCegarLoop]: Abstraction has 18020 states and 53086 transitions. [2021-08-21 12:10:49,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:49,586 INFO L276 IsEmpty]: Start isEmpty. Operand 18020 states and 53086 transitions. [2021-08-21 12:10:49,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:10:49,606 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:49,606 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:49,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Forceful destruction successful, exit code 0 [2021-08-21 12:10:49,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,361 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:49,830 INFO L402 AbstractCegarLoop]: === Iteration 364 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:49,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:49,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1220019328, now seen corresponding path program 360 times [2021-08-21 12:10:49,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:49,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150904585] [2021-08-21 12:10:49,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:49,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:49,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:49,945 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:49,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:49,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150904585] [2021-08-21 12:10:49,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150904585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:49,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5644646] [2021-08-21 12:10:49,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:10:49,945 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:49,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:49,946 INFO L229 MonitoredProcess]: Starting monitored process 362 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:49,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Waiting until timeout for monitored process [2021-08-21 12:10:52,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:10:52,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:10:52,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:10:52,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:52,550 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:52,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5644646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:52,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:52,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-21 12:10:52,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665911261] [2021-08-21 12:10:52,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:10:52,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:52,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:10:52,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:10:52,551 INFO L87 Difference]: Start difference. First operand 18020 states and 53086 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:52,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:52,863 INFO L93 Difference]: Finished difference Result 20773 states and 59944 transitions. [2021-08-21 12:10:52,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:10:52,864 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 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 23 [2021-08-21 12:10:52,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:52,912 INFO L225 Difference]: With dead ends: 20773 [2021-08-21 12:10:52,912 INFO L226 Difference]: Without dead ends: 20759 [2021-08-21 12:10:52,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 214.7ms TimeCoverageRelationStatistics Valid=384, Invalid=806, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:10:52,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20759 states. [2021-08-21 12:10:53,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20759 to 18039. [2021-08-21 12:10:53,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18039 states, 18038 states have (on average 2.945670251690875) internal successors, (53134), 18038 states have internal predecessors, (53134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:53,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18039 states to 18039 states and 53134 transitions. [2021-08-21 12:10:53,309 INFO L78 Accepts]: Start accepts. Automaton has 18039 states and 53134 transitions. Word has length 23 [2021-08-21 12:10:53,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:53,310 INFO L470 AbstractCegarLoop]: Abstraction has 18039 states and 53134 transitions. [2021-08-21 12:10:53,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:53,310 INFO L276 IsEmpty]: Start isEmpty. Operand 18039 states and 53134 transitions. [2021-08-21 12:10:53,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:10:53,329 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:53,329 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:53,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Forceful destruction successful, exit code 0 [2021-08-21 12:10:53,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,362 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:53,552 INFO L402 AbstractCegarLoop]: === Iteration 365 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:53,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:53,553 INFO L82 PathProgramCache]: Analyzing trace with hash 793091106, now seen corresponding path program 361 times [2021-08-21 12:10:53,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:53,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030759104] [2021-08-21 12:10:53,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:53,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:53,671 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:53,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:53,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030759104] [2021-08-21 12:10:53,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030759104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:53,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161253805] [2021-08-21 12:10:53,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:10:53,672 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:53,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:53,673 INFO L229 MonitoredProcess]: Starting monitored process 363 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:53,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Waiting until timeout for monitored process [2021-08-21 12:10:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:56,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:10:56,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:56,222 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:10:56,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161253805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:56,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:56,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-08-21 12:10:56,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868105105] [2021-08-21 12:10:56,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:10:56,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:56,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:10:56,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:10:56,222 INFO L87 Difference]: Start difference. First operand 18039 states and 53134 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:56,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:56,604 INFO L93 Difference]: Finished difference Result 19677 states and 56946 transitions. [2021-08-21 12:10:56,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:10:56,605 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:10:56,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:56,651 INFO L225 Difference]: With dead ends: 19677 [2021-08-21 12:10:56,651 INFO L226 Difference]: Without dead ends: 19661 [2021-08-21 12:10:56,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 282.8ms TimeCoverageRelationStatistics Valid=511, Invalid=1049, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:10:56,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19661 states. [2021-08-21 12:10:56,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19661 to 18041. [2021-08-21 12:10:56,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18041 states, 18040 states have (on average 2.9453436807095343) internal successors, (53134), 18040 states have internal predecessors, (53134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:57,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18041 states to 18041 states and 53134 transitions. [2021-08-21 12:10:57,036 INFO L78 Accepts]: Start accepts. Automaton has 18041 states and 53134 transitions. Word has length 23 [2021-08-21 12:10:57,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:57,036 INFO L470 AbstractCegarLoop]: Abstraction has 18041 states and 53134 transitions. [2021-08-21 12:10:57,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:57,036 INFO L276 IsEmpty]: Start isEmpty. Operand 18041 states and 53134 transitions. [2021-08-21 12:10:57,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:10:57,056 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:57,056 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:57,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Ended with exit code 0 [2021-08-21 12:10:57,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2021-08-21 12:10:57,261 INFO L402 AbstractCegarLoop]: === Iteration 366 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:57,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:57,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1571234966, now seen corresponding path program 362 times [2021-08-21 12:10:57,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:57,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009754975] [2021-08-21 12:10:57,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:57,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:57,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:57,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:57,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009754975] [2021-08-21 12:10:57,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009754975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:57,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799985421] [2021-08-21 12:10:57,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:10:57,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:57,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:57,379 INFO L229 MonitoredProcess]: Starting monitored process 364 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:57,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Waiting until timeout for monitored process [2021-08-21 12:10:59,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:10:59,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:10:59,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:10:59,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:59,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799985421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:59,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:59,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-21 12:10:59,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954439962] [2021-08-21 12:10:59,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:10:59,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:59,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:10:59,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:10:59,889 INFO L87 Difference]: Start difference. First operand 18041 states and 53134 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:00,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:00,123 INFO L93 Difference]: Finished difference Result 18301 states and 53570 transitions. [2021-08-21 12:11:00,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:11:00,123 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:11:00,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:00,163 INFO L225 Difference]: With dead ends: 18301 [2021-08-21 12:11:00,163 INFO L226 Difference]: Without dead ends: 18295 [2021-08-21 12:11:00,163 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 158.3ms TimeCoverageRelationStatistics Valid=245, Invalid=457, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:11:00,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18295 states. [2021-08-21 12:11:00,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18295 to 18076. [2021-08-21 12:11:00,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18076 states, 18075 states have (on average 2.9453941908713692) internal successors, (53238), 18075 states have internal predecessors, (53238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:00,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18076 states to 18076 states and 53238 transitions. [2021-08-21 12:11:00,514 INFO L78 Accepts]: Start accepts. Automaton has 18076 states and 53238 transitions. Word has length 23 [2021-08-21 12:11:00,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:00,515 INFO L470 AbstractCegarLoop]: Abstraction has 18076 states and 53238 transitions. [2021-08-21 12:11:00,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:00,515 INFO L276 IsEmpty]: Start isEmpty. Operand 18076 states and 53238 transitions. [2021-08-21 12:11:00,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:11:00,533 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:00,534 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:00,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Forceful destruction successful, exit code 0 [2021-08-21 12:11:00,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365,364 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:00,751 INFO L402 AbstractCegarLoop]: === Iteration 367 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:00,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:00,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1181435828, now seen corresponding path program 363 times [2021-08-21 12:11:00,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:00,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997245846] [2021-08-21 12:11:00,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:00,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:00,858 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:00,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:00,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997245846] [2021-08-21 12:11:00,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997245846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:00,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972400873] [2021-08-21 12:11:00,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:11:00,858 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:00,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:00,859 INFO L229 MonitoredProcess]: Starting monitored process 365 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:00,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Waiting until timeout for monitored process [2021-08-21 12:11:03,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:11:03,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:11:03,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:11:03,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:03,427 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:03,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972400873] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:03,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:03,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-21 12:11:03,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433282198] [2021-08-21 12:11:03,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:11:03,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:03,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:11:03,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:11:03,428 INFO L87 Difference]: Start difference. First operand 18076 states and 53238 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:03,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:03,679 INFO L93 Difference]: Finished difference Result 18498 states and 54133 transitions. [2021-08-21 12:11:03,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:11:03,679 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:11:03,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:03,719 INFO L225 Difference]: With dead ends: 18498 [2021-08-21 12:11:03,720 INFO L226 Difference]: Without dead ends: 18484 [2021-08-21 12:11:03,720 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 164.7ms TimeCoverageRelationStatistics Valid=297, Invalid=633, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:11:03,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18484 states. [2021-08-21 12:11:04,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18484 to 18072. [2021-08-21 12:11:04,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18072 states, 18071 states have (on average 2.9446627192739747) internal successors, (53213), 18071 states have internal predecessors, (53213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:04,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18072 states to 18072 states and 53213 transitions. [2021-08-21 12:11:04,099 INFO L78 Accepts]: Start accepts. Automaton has 18072 states and 53213 transitions. Word has length 23 [2021-08-21 12:11:04,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:04,099 INFO L470 AbstractCegarLoop]: Abstraction has 18072 states and 53213 transitions. [2021-08-21 12:11:04,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:04,099 INFO L276 IsEmpty]: Start isEmpty. Operand 18072 states and 53213 transitions. [2021-08-21 12:11:04,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:11:04,120 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:04,120 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:04,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Ended with exit code 0 [2021-08-21 12:11:04,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-08-21 12:11:04,335 INFO L402 AbstractCegarLoop]: === Iteration 368 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:04,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:04,335 INFO L82 PathProgramCache]: Analyzing trace with hash 2080934058, now seen corresponding path program 364 times [2021-08-21 12:11:04,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:04,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139157985] [2021-08-21 12:11:04,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:04,335 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:04,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:11:04,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:04,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139157985] [2021-08-21 12:11:04,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139157985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:04,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931552808] [2021-08-21 12:11:04,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:11:04,420 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:04,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:04,421 INFO L229 MonitoredProcess]: Starting monitored process 366 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:04,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Waiting until timeout for monitored process [2021-08-21 12:11:07,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:11:07,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:11:07,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:11:07,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:07,061 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:11:07,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931552808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:07,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:07,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-08-21 12:11:07,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797987403] [2021-08-21 12:11:07,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:11:07,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:07,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:11:07,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:11:07,062 INFO L87 Difference]: Start difference. First operand 18072 states and 53213 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:07,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:07,299 INFO L93 Difference]: Finished difference Result 18513 states and 53971 transitions. [2021-08-21 12:11:07,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:11:07,300 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:11:07,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:07,343 INFO L225 Difference]: With dead ends: 18513 [2021-08-21 12:11:07,343 INFO L226 Difference]: Without dead ends: 18505 [2021-08-21 12:11:07,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 125.5ms TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:11:07,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18505 states. [2021-08-21 12:11:07,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18505 to 18072. [2021-08-21 12:11:07,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18072 states, 18071 states have (on average 2.9434452990980025) internal successors, (53191), 18071 states have internal predecessors, (53191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:07,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18072 states to 18072 states and 53191 transitions. [2021-08-21 12:11:07,744 INFO L78 Accepts]: Start accepts. Automaton has 18072 states and 53191 transitions. Word has length 23 [2021-08-21 12:11:07,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:07,744 INFO L470 AbstractCegarLoop]: Abstraction has 18072 states and 53191 transitions. [2021-08-21 12:11:07,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:07,745 INFO L276 IsEmpty]: Start isEmpty. Operand 18072 states and 53191 transitions. [2021-08-21 12:11:07,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:11:07,766 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:07,766 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:07,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Forceful destruction successful, exit code 0 [2021-08-21 12:11:07,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-08-21 12:11:07,989 INFO L402 AbstractCegarLoop]: === Iteration 369 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:07,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:07,989 INFO L82 PathProgramCache]: Analyzing trace with hash -287999160, now seen corresponding path program 365 times [2021-08-21 12:11:07,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:07,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449477628] [2021-08-21 12:11:07,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:07,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:08,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:08,085 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:08,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:08,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449477628] [2021-08-21 12:11:08,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449477628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:08,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663332798] [2021-08-21 12:11:08,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:11:08,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:08,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:08,086 INFO L229 MonitoredProcess]: Starting monitored process 367 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:08,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Waiting until timeout for monitored process [2021-08-21 12:11:10,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:11:10,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:11:10,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:11:10,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:10,708 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:10,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663332798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:10,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:10,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:11:10,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179363410] [2021-08-21 12:11:10,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:11:10,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:10,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:11:10,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:11:10,708 INFO L87 Difference]: Start difference. First operand 18072 states and 53191 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:10,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:10,949 INFO L93 Difference]: Finished difference Result 18539 states and 53986 transitions. [2021-08-21 12:11:10,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:11:10,950 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:11:10,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:10,988 INFO L225 Difference]: With dead ends: 18539 [2021-08-21 12:11:10,988 INFO L226 Difference]: Without dead ends: 18529 [2021-08-21 12:11:10,988 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 147.8ms TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:11:11,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18529 states. [2021-08-21 12:11:11,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18529 to 18097. [2021-08-21 12:11:11,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18097 states, 18096 states have (on average 2.942583996463307) internal successors, (53249), 18096 states have internal predecessors, (53249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:11,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18097 states to 18097 states and 53249 transitions. [2021-08-21 12:11:11,365 INFO L78 Accepts]: Start accepts. Automaton has 18097 states and 53249 transitions. Word has length 23 [2021-08-21 12:11:11,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:11,366 INFO L470 AbstractCegarLoop]: Abstraction has 18097 states and 53249 transitions. [2021-08-21 12:11:11,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:11,366 INFO L276 IsEmpty]: Start isEmpty. Operand 18097 states and 53249 transitions. [2021-08-21 12:11:11,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:11:11,386 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:11,386 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:11,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Forceful destruction successful, exit code 0 [2021-08-21 12:11:11,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2021-08-21 12:11:11,609 INFO L402 AbstractCegarLoop]: === Iteration 370 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:11,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:11,609 INFO L82 PathProgramCache]: Analyzing trace with hash -710484886, now seen corresponding path program 366 times [2021-08-21 12:11:11,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:11,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922709414] [2021-08-21 12:11:11,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:11,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:11,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:11,706 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:11:11,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:11,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922709414] [2021-08-21 12:11:11,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922709414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:11,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420527255] [2021-08-21 12:11:11,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:11:11,706 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:11,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:11,707 INFO L229 MonitoredProcess]: Starting monitored process 368 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:11,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Waiting until timeout for monitored process [2021-08-21 12:11:14,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:11:14,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:11:14,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:11:14,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:14,234 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:11:14,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420527255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:14,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:14,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:11:14,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114061728] [2021-08-21 12:11:14,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:11:14,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:14,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:11:14,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:11:14,235 INFO L87 Difference]: Start difference. First operand 18097 states and 53249 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:14,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:14,523 INFO L93 Difference]: Finished difference Result 20393 states and 58774 transitions. [2021-08-21 12:11:14,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:11:14,523 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:11:14,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:14,568 INFO L225 Difference]: With dead ends: 20393 [2021-08-21 12:11:14,568 INFO L226 Difference]: Without dead ends: 20381 [2021-08-21 12:11:14,568 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 180.2ms TimeCoverageRelationStatistics Valid=317, Invalid=675, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:11:14,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20381 states. [2021-08-21 12:11:14,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20381 to 18097. [2021-08-21 12:11:14,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18097 states, 18096 states have (on average 2.942418213969938) internal successors, (53246), 18096 states have internal predecessors, (53246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:14,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18097 states to 18097 states and 53246 transitions. [2021-08-21 12:11:14,928 INFO L78 Accepts]: Start accepts. Automaton has 18097 states and 53246 transitions. Word has length 23 [2021-08-21 12:11:14,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:14,928 INFO L470 AbstractCegarLoop]: Abstraction has 18097 states and 53246 transitions. [2021-08-21 12:11:14,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:14,929 INFO L276 IsEmpty]: Start isEmpty. Operand 18097 states and 53246 transitions. [2021-08-21 12:11:14,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:11:14,948 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:14,949 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:14,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Ended with exit code 0 [2021-08-21 12:11:15,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,368 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:15,150 INFO L402 AbstractCegarLoop]: === Iteration 371 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:15,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:15,150 INFO L82 PathProgramCache]: Analyzing trace with hash -922640504, now seen corresponding path program 367 times [2021-08-21 12:11:15,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:15,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124029436] [2021-08-21 12:11:15,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:15,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:15,270 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:15,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:15,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124029436] [2021-08-21 12:11:15,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124029436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:15,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841704653] [2021-08-21 12:11:15,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:11:15,271 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:15,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:15,271 INFO L229 MonitoredProcess]: Starting monitored process 369 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:15,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Waiting until timeout for monitored process [2021-08-21 12:11:17,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:17,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:11:17,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:17,951 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:11:17,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841704653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:17,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:17,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-08-21 12:11:17,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215394640] [2021-08-21 12:11:17,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:11:17,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:17,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:11:17,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:11:17,952 INFO L87 Difference]: Start difference. First operand 18097 states and 53246 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:18,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:18,260 INFO L93 Difference]: Finished difference Result 20413 states and 58792 transitions. [2021-08-21 12:11:18,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:11:18,260 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:11:18,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:18,301 INFO L225 Difference]: With dead ends: 20413 [2021-08-21 12:11:18,301 INFO L226 Difference]: Without dead ends: 20399 [2021-08-21 12:11:18,302 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 203.0ms TimeCoverageRelationStatistics Valid=360, Invalid=762, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:11:18,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20399 states. [2021-08-21 12:11:18,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20399 to 18113. [2021-08-21 12:11:18,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18113 states, 18112 states have (on average 2.942303445229682) internal successors, (53291), 18112 states have internal predecessors, (53291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:18,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18113 states to 18113 states and 53291 transitions. [2021-08-21 12:11:18,683 INFO L78 Accepts]: Start accepts. Automaton has 18113 states and 53291 transitions. Word has length 23 [2021-08-21 12:11:18,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:18,683 INFO L470 AbstractCegarLoop]: Abstraction has 18113 states and 53291 transitions. [2021-08-21 12:11:18,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:18,683 INFO L276 IsEmpty]: Start isEmpty. Operand 18113 states and 53291 transitions. [2021-08-21 12:11:18,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:11:18,705 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:18,705 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:18,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Ended with exit code 0 [2021-08-21 12:11:18,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,369 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:18,913 INFO L402 AbstractCegarLoop]: === Iteration 372 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:18,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:18,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1090469930, now seen corresponding path program 368 times [2021-08-21 12:11:18,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:18,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195622810] [2021-08-21 12:11:18,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:18,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:18,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:19,035 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:19,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:19,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195622810] [2021-08-21 12:11:19,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195622810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:19,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422420301] [2021-08-21 12:11:19,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:11:19,035 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:19,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:19,036 INFO L229 MonitoredProcess]: Starting monitored process 370 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:19,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Waiting until timeout for monitored process [2021-08-21 12:11:21,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:11:21,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:11:21,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:11:21,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:21,752 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:11:21,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422420301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:21,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:21,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-08-21 12:11:21,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367279309] [2021-08-21 12:11:21,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:11:21,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:21,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:11:21,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:11:21,753 INFO L87 Difference]: Start difference. First operand 18113 states and 53291 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:22,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:22,118 INFO L93 Difference]: Finished difference Result 19757 states and 57064 transitions. [2021-08-21 12:11:22,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:11:22,118 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:11:22,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:22,158 INFO L225 Difference]: With dead ends: 19757 [2021-08-21 12:11:22,158 INFO L226 Difference]: Without dead ends: 19741 [2021-08-21 12:11:22,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 281.3ms TimeCoverageRelationStatistics Valid=481, Invalid=1001, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:11:22,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19741 states. [2021-08-21 12:11:22,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19741 to 18113. [2021-08-21 12:11:22,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18113 states, 18112 states have (on average 2.9421930212014136) internal successors, (53289), 18112 states have internal predecessors, (53289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:22,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18113 states to 18113 states and 53289 transitions. [2021-08-21 12:11:22,517 INFO L78 Accepts]: Start accepts. Automaton has 18113 states and 53289 transitions. Word has length 23 [2021-08-21 12:11:22,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:22,517 INFO L470 AbstractCegarLoop]: Abstraction has 18113 states and 53289 transitions. [2021-08-21 12:11:22,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:22,517 INFO L276 IsEmpty]: Start isEmpty. Operand 18113 states and 53289 transitions. [2021-08-21 12:11:22,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:11:22,536 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:22,536 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:22,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Ended with exit code 0 [2021-08-21 12:11:22,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,370 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:22,749 INFO L402 AbstractCegarLoop]: === Iteration 373 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:22,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:22,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1706129584, now seen corresponding path program 369 times [2021-08-21 12:11:22,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:22,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564238657] [2021-08-21 12:11:22,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:22,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:22,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:22,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:22,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564238657] [2021-08-21 12:11:22,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564238657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:22,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122601870] [2021-08-21 12:11:22,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:11:22,838 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:22,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:22,838 INFO L229 MonitoredProcess]: Starting monitored process 371 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:22,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Waiting until timeout for monitored process [2021-08-21 12:11:25,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 12:11:25,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:11:25,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:11:25,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:25,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122601870] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:25,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:25,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:11:25,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572448376] [2021-08-21 12:11:25,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:11:25,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:25,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:11:25,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:11:25,543 INFO L87 Difference]: Start difference. First operand 18113 states and 53289 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:25,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:25,732 INFO L93 Difference]: Finished difference Result 18529 states and 54072 transitions. [2021-08-21 12:11:25,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:11:25,733 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:11:25,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:25,771 INFO L225 Difference]: With dead ends: 18529 [2021-08-21 12:11:25,771 INFO L226 Difference]: Without dead ends: 18525 [2021-08-21 12:11:25,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=187, Invalid=319, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:11:25,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18525 states. [2021-08-21 12:11:26,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18525 to 18191. [2021-08-21 12:11:26,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18191 states, 18190 states have (on average 2.9438702583837273) internal successors, (53549), 18190 states have internal predecessors, (53549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:26,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18191 states to 18191 states and 53549 transitions. [2021-08-21 12:11:26,148 INFO L78 Accepts]: Start accepts. Automaton has 18191 states and 53549 transitions. Word has length 23 [2021-08-21 12:11:26,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:26,148 INFO L470 AbstractCegarLoop]: Abstraction has 18191 states and 53549 transitions. [2021-08-21 12:11:26,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:26,148 INFO L276 IsEmpty]: Start isEmpty. Operand 18191 states and 53549 transitions. [2021-08-21 12:11:26,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:11:26,167 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:26,167 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:26,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Forceful destruction successful, exit code 0 [2021-08-21 12:11:26,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,371 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:26,391 INFO L402 AbstractCegarLoop]: === Iteration 374 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:26,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:26,391 INFO L82 PathProgramCache]: Analyzing trace with hash -405283922, now seen corresponding path program 370 times [2021-08-21 12:11:26,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:26,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156919445] [2021-08-21 12:11:26,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:26,392 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:26,486 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:11:26,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:26,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156919445] [2021-08-21 12:11:26,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156919445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:26,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589754287] [2021-08-21 12:11:26,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:11:26,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:26,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:26,487 INFO L229 MonitoredProcess]: Starting monitored process 372 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:26,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Waiting until timeout for monitored process [2021-08-21 12:11:28,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:11:28,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:11:28,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:11:28,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:29,006 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:11:29,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589754287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:29,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:29,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-08-21 12:11:29,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754013537] [2021-08-21 12:11:29,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:11:29,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:29,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:11:29,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:11:29,006 INFO L87 Difference]: Start difference. First operand 18191 states and 53549 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:29,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:29,378 INFO L93 Difference]: Finished difference Result 20010 states and 57913 transitions. [2021-08-21 12:11:29,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:11:29,379 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:11:29,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:29,418 INFO L225 Difference]: With dead ends: 20010 [2021-08-21 12:11:29,419 INFO L226 Difference]: Without dead ends: 19998 [2021-08-21 12:11:29,419 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 153.2ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:11:29,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19998 states. [2021-08-21 12:11:29,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19998 to 18191. [2021-08-21 12:11:29,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18191 states, 18190 states have (on average 2.9432105552501375) internal successors, (53537), 18190 states have internal predecessors, (53537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:29,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18191 states to 18191 states and 53537 transitions. [2021-08-21 12:11:29,797 INFO L78 Accepts]: Start accepts. Automaton has 18191 states and 53537 transitions. Word has length 23 [2021-08-21 12:11:29,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:29,797 INFO L470 AbstractCegarLoop]: Abstraction has 18191 states and 53537 transitions. [2021-08-21 12:11:29,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:29,797 INFO L276 IsEmpty]: Start isEmpty. Operand 18191 states and 53537 transitions. [2021-08-21 12:11:29,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:11:29,817 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:29,817 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:29,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Forceful destruction successful, exit code 0 [2021-08-21 12:11:30,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,372 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:30,030 INFO L402 AbstractCegarLoop]: === Iteration 375 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:30,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:30,031 INFO L82 PathProgramCache]: Analyzing trace with hash -617439540, now seen corresponding path program 371 times [2021-08-21 12:11:30,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:30,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083964502] [2021-08-21 12:11:30,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:30,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:30,137 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:30,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:30,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083964502] [2021-08-21 12:11:30,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083964502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:30,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147663582] [2021-08-21 12:11:30,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:11:30,137 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:30,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:30,138 INFO L229 MonitoredProcess]: Starting monitored process 373 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:30,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Waiting until timeout for monitored process [2021-08-21 12:11:32,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:11:32,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:11:32,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:11:32,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:11:32,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147663582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:32,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:32,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-08-21 12:11:32,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341100710] [2021-08-21 12:11:32,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:11:32,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:32,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:11:32,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:11:32,725 INFO L87 Difference]: Start difference. First operand 18191 states and 53537 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:32,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:32,978 INFO L93 Difference]: Finished difference Result 20025 states and 57920 transitions. [2021-08-21 12:11:32,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:11:32,979 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:11:32,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:33,177 INFO L225 Difference]: With dead ends: 20025 [2021-08-21 12:11:33,177 INFO L226 Difference]: Without dead ends: 20011 [2021-08-21 12:11:33,177 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 161.4ms TimeCoverageRelationStatistics Valid=297, Invalid=633, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:11:33,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20011 states. [2021-08-21 12:11:33,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20011 to 18212. [2021-08-21 12:11:33,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18212 states, 18211 states have (on average 2.942672011421668) internal successors, (53589), 18211 states have internal predecessors, (53589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:33,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18212 states to 18212 states and 53589 transitions. [2021-08-21 12:11:33,510 INFO L78 Accepts]: Start accepts. Automaton has 18212 states and 53589 transitions. Word has length 23 [2021-08-21 12:11:33,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:33,510 INFO L470 AbstractCegarLoop]: Abstraction has 18212 states and 53589 transitions. [2021-08-21 12:11:33,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:33,511 INFO L276 IsEmpty]: Start isEmpty. Operand 18212 states and 53589 transitions. [2021-08-21 12:11:33,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:11:33,530 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:33,530 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:33,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Ended with exit code 0 [2021-08-21 12:11:33,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,373 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:33,753 INFO L402 AbstractCegarLoop]: === Iteration 376 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:33,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:33,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1395670894, now seen corresponding path program 372 times [2021-08-21 12:11:33,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:33,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430530314] [2021-08-21 12:11:33,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:33,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:33,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:33,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430530314] [2021-08-21 12:11:33,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430530314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:33,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887656057] [2021-08-21 12:11:33,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:11:33,864 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:33,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:33,865 INFO L229 MonitoredProcess]: Starting monitored process 374 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:33,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Waiting until timeout for monitored process [2021-08-21 12:11:36,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:11:36,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:11:36,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:11:36,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:36,404 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:36,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887656057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:36,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:36,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-21 12:11:36,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234665317] [2021-08-21 12:11:36,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:11:36,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:36,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:11:36,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:11:36,405 INFO L87 Difference]: Start difference. First operand 18212 states and 53589 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:36,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:36,714 INFO L93 Difference]: Finished difference Result 19906 states and 57507 transitions. [2021-08-21 12:11:36,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:11:36,715 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:11:36,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:36,756 INFO L225 Difference]: With dead ends: 19906 [2021-08-21 12:11:36,756 INFO L226 Difference]: Without dead ends: 19890 [2021-08-21 12:11:36,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 220.7ms TimeCoverageRelationStatistics Valid=403, Invalid=857, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:11:36,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19890 states. [2021-08-21 12:11:37,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19890 to 18212. [2021-08-21 12:11:37,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18212 states, 18211 states have (on average 2.9425621876887593) internal successors, (53587), 18211 states have internal predecessors, (53587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:37,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18212 states to 18212 states and 53587 transitions. [2021-08-21 12:11:37,116 INFO L78 Accepts]: Start accepts. Automaton has 18212 states and 53587 transitions. Word has length 23 [2021-08-21 12:11:37,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:37,116 INFO L470 AbstractCegarLoop]: Abstraction has 18212 states and 53587 transitions. [2021-08-21 12:11:37,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:37,117 INFO L276 IsEmpty]: Start isEmpty. Operand 18212 states and 53587 transitions. [2021-08-21 12:11:37,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:11:37,137 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:37,137 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:37,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Forceful destruction successful, exit code 0 [2021-08-21 12:11:37,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-08-21 12:11:37,353 INFO L402 AbstractCegarLoop]: === Iteration 377 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:37,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:37,353 INFO L82 PathProgramCache]: Analyzing trace with hash -325007702, now seen corresponding path program 373 times [2021-08-21 12:11:37,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:37,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843271989] [2021-08-21 12:11:37,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:37,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:37,432 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:37,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:37,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843271989] [2021-08-21 12:11:37,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843271989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:37,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610897613] [2021-08-21 12:11:37,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:11:37,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:37,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:37,433 INFO L229 MonitoredProcess]: Starting monitored process 375 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:37,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Waiting until timeout for monitored process [2021-08-21 12:11:40,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:40,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:11:40,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:40,128 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:40,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610897613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:40,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:40,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:11:40,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525829845] [2021-08-21 12:11:40,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:11:40,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:40,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:11:40,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:11:40,129 INFO L87 Difference]: Start difference. First operand 18212 states and 53587 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:40,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:40,297 INFO L93 Difference]: Finished difference Result 18950 states and 55270 transitions. [2021-08-21 12:11:40,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:11:40,297 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:11:40,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:40,339 INFO L225 Difference]: With dead ends: 18950 [2021-08-21 12:11:40,339 INFO L226 Difference]: Without dead ends: 18950 [2021-08-21 12:11:40,339 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=136, Invalid=206, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:11:40,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18950 states. [2021-08-21 12:11:40,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18950 to 18506. [2021-08-21 12:11:40,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18506 states, 18505 states have (on average 2.9491488786814375) internal successors, (54574), 18505 states have internal predecessors, (54574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:40,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18506 states to 18506 states and 54574 transitions. [2021-08-21 12:11:40,731 INFO L78 Accepts]: Start accepts. Automaton has 18506 states and 54574 transitions. Word has length 23 [2021-08-21 12:11:40,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:40,731 INFO L470 AbstractCegarLoop]: Abstraction has 18506 states and 54574 transitions. [2021-08-21 12:11:40,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:40,731 INFO L276 IsEmpty]: Start isEmpty. Operand 18506 states and 54574 transitions. [2021-08-21 12:11:40,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:11:40,754 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:40,754 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:40,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Forceful destruction successful, exit code 0 [2021-08-21 12:11:40,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-08-21 12:11:40,969 INFO L402 AbstractCegarLoop]: === Iteration 378 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:40,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:40,969 INFO L82 PathProgramCache]: Analyzing trace with hash 989874090, now seen corresponding path program 374 times [2021-08-21 12:11:40,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:40,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159934147] [2021-08-21 12:11:40,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:40,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:40,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:41,078 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:41,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:41,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159934147] [2021-08-21 12:11:41,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159934147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:41,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005564181] [2021-08-21 12:11:41,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:11:41,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:41,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:41,080 INFO L229 MonitoredProcess]: Starting monitored process 376 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:41,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Waiting until timeout for monitored process [2021-08-21 12:11:43,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:11:43,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:11:43,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:11:43,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:11:43,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005564181] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:43,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:43,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-08-21 12:11:43,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902100145] [2021-08-21 12:11:43,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:11:43,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:43,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:11:43,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:11:43,786 INFO L87 Difference]: Start difference. First operand 18506 states and 54574 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:44,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:44,052 INFO L93 Difference]: Finished difference Result 20324 states and 59011 transitions. [2021-08-21 12:11:44,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:11:44,052 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:11:44,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:44,092 INFO L225 Difference]: With dead ends: 20324 [2021-08-21 12:11:44,092 INFO L226 Difference]: Without dead ends: 20308 [2021-08-21 12:11:44,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 172.6ms TimeCoverageRelationStatistics Valid=298, Invalid=632, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:11:44,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20308 states. [2021-08-21 12:11:44,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20308 to 18506. [2021-08-21 12:11:44,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18506 states, 18505 states have (on average 2.9490407997838424) internal successors, (54572), 18505 states have internal predecessors, (54572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:44,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18506 states to 18506 states and 54572 transitions. [2021-08-21 12:11:44,439 INFO L78 Accepts]: Start accepts. Automaton has 18506 states and 54572 transitions. Word has length 23 [2021-08-21 12:11:44,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:44,439 INFO L470 AbstractCegarLoop]: Abstraction has 18506 states and 54572 transitions. [2021-08-21 12:11:44,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:44,440 INFO L276 IsEmpty]: Start isEmpty. Operand 18506 states and 54572 transitions. [2021-08-21 12:11:44,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:11:44,460 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:44,461 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:44,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Forceful destruction successful, exit code 0 [2021-08-21 12:11:44,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-08-21 12:11:44,684 INFO L402 AbstractCegarLoop]: === Iteration 379 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:44,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:44,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1111739376, now seen corresponding path program 375 times [2021-08-21 12:11:44,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:44,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094088372] [2021-08-21 12:11:44,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:44,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:44,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:44,759 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:44,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:44,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094088372] [2021-08-21 12:11:44,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094088372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:44,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131893418] [2021-08-21 12:11:44,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:11:44,759 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:44,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:44,760 INFO L229 MonitoredProcess]: Starting monitored process 377 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:44,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Waiting until timeout for monitored process [2021-08-21 12:11:47,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:11:47,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:11:47,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:11:47,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:47,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131893418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:47,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:47,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 12:11:47,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208963258] [2021-08-21 12:11:47,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:11:47,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:47,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:11:47,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:11:47,469 INFO L87 Difference]: Start difference. First operand 18506 states and 54572 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:47,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:47,591 INFO L93 Difference]: Finished difference Result 21448 states and 62871 transitions. [2021-08-21 12:11:47,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:11:47,591 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:11:47,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:47,637 INFO L225 Difference]: With dead ends: 21448 [2021-08-21 12:11:47,637 INFO L226 Difference]: Without dead ends: 21448 [2021-08-21 12:11:47,637 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:11:47,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21448 states. [2021-08-21 12:11:48,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21448 to 20976. [2021-08-21 12:11:48,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20976 states, 20975 states have (on average 2.963098927294398) internal successors, (62151), 20975 states have internal predecessors, (62151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:48,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20976 states to 20976 states and 62151 transitions. [2021-08-21 12:11:48,097 INFO L78 Accepts]: Start accepts. Automaton has 20976 states and 62151 transitions. Word has length 23 [2021-08-21 12:11:48,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:48,097 INFO L470 AbstractCegarLoop]: Abstraction has 20976 states and 62151 transitions. [2021-08-21 12:11:48,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:48,097 INFO L276 IsEmpty]: Start isEmpty. Operand 20976 states and 62151 transitions. [2021-08-21 12:11:48,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:11:48,117 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:48,117 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:48,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Forceful destruction successful, exit code 0 [2021-08-21 12:11:48,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-08-21 12:11:48,329 INFO L402 AbstractCegarLoop]: === Iteration 380 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:48,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:48,329 INFO L82 PathProgramCache]: Analyzing trace with hash -197453586, now seen corresponding path program 376 times [2021-08-21 12:11:48,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:48,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664626202] [2021-08-21 12:11:48,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:48,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:48,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 49 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:48,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:48,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664626202] [2021-08-21 12:11:48,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664626202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:48,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533051777] [2021-08-21 12:11:48,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:11:48,400 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:48,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:48,401 INFO L229 MonitoredProcess]: Starting monitored process 378 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:48,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Waiting until timeout for monitored process [2021-08-21 12:11:51,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:11:51,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:11:51,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:11:51,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 54 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:11:51,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533051777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:51,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:51,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-08-21 12:11:51,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419100331] [2021-08-21 12:11:51,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:11:51,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:51,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:11:51,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:11:51,153 INFO L87 Difference]: Start difference. First operand 20976 states and 62151 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:51,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:51,296 INFO L93 Difference]: Finished difference Result 21357 states and 62681 transitions. [2021-08-21 12:11:51,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:11:51,297 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:11:51,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:51,333 INFO L225 Difference]: With dead ends: 21357 [2021-08-21 12:11:51,333 INFO L226 Difference]: Without dead ends: 21357 [2021-08-21 12:11:51,333 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:11:51,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21357 states. [2021-08-21 12:11:51,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21357 to 20975. [2021-08-21 12:11:51,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20975 states, 20974 states have (on average 2.9630018117669494) internal successors, (62146), 20974 states have internal predecessors, (62146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:51,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20975 states to 20975 states and 62146 transitions. [2021-08-21 12:11:51,698 INFO L78 Accepts]: Start accepts. Automaton has 20975 states and 62146 transitions. Word has length 23 [2021-08-21 12:11:51,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:51,698 INFO L470 AbstractCegarLoop]: Abstraction has 20975 states and 62146 transitions. [2021-08-21 12:11:51,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:51,698 INFO L276 IsEmpty]: Start isEmpty. Operand 20975 states and 62146 transitions. [2021-08-21 12:11:51,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:11:51,719 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:51,719 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:51,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Forceful destruction successful, exit code 0 [2021-08-21 12:11:51,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,378 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:51,936 INFO L402 AbstractCegarLoop]: === Iteration 381 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:51,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:51,936 INFO L82 PathProgramCache]: Analyzing trace with hash 657853068, now seen corresponding path program 377 times [2021-08-21 12:11:51,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:51,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358945450] [2021-08-21 12:11:51,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:51,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:52,011 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 42 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:52,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:52,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358945450] [2021-08-21 12:11:52,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358945450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:52,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317349883] [2021-08-21 12:11:52,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:11:52,012 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:52,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:52,012 INFO L229 MonitoredProcess]: Starting monitored process 379 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:52,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Waiting until timeout for monitored process [2021-08-21 12:11:54,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:11:54,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:11:54,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:11:54,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 49 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:11:54,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317349883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:54,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:54,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-08-21 12:11:54,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397603107] [2021-08-21 12:11:54,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:11:54,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:54,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:11:54,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:11:54,641 INFO L87 Difference]: Start difference. First operand 20975 states and 62146 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:54,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:54,834 INFO L93 Difference]: Finished difference Result 21390 states and 62732 transitions. [2021-08-21 12:11:54,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:11:54,835 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:11:54,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:54,883 INFO L225 Difference]: With dead ends: 21390 [2021-08-21 12:11:54,884 INFO L226 Difference]: Without dead ends: 21388 [2021-08-21 12:11:54,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:11:54,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21388 states. [2021-08-21 12:11:55,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21388 to 20975. [2021-08-21 12:11:55,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20975 states, 20974 states have (on average 2.96290645561171) internal successors, (62144), 20974 states have internal predecessors, (62144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:55,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20975 states to 20975 states and 62144 transitions. [2021-08-21 12:11:55,278 INFO L78 Accepts]: Start accepts. Automaton has 20975 states and 62144 transitions. Word has length 23 [2021-08-21 12:11:55,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:55,278 INFO L470 AbstractCegarLoop]: Abstraction has 20975 states and 62144 transitions. [2021-08-21 12:11:55,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:55,279 INFO L276 IsEmpty]: Start isEmpty. Operand 20975 states and 62144 transitions. [2021-08-21 12:11:55,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:11:55,298 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:55,298 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:55,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Forceful destruction successful, exit code 0 [2021-08-21 12:11:55,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 379 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-08-21 12:11:55,521 INFO L402 AbstractCegarLoop]: === Iteration 382 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:55,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:55,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1402555566, now seen corresponding path program 378 times [2021-08-21 12:11:55,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:55,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104405001] [2021-08-21 12:11:55,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:55,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:55,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 37 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:55,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:55,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104405001] [2021-08-21 12:11:55,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104405001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:55,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620336512] [2021-08-21 12:11:55,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:11:55,599 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:55,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:55,599 INFO L229 MonitoredProcess]: Starting monitored process 380 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:55,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Waiting until timeout for monitored process [2021-08-21 12:11:58,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:11:58,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:11:58,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:11:58,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 37 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:58,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620336512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:58,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:58,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 12:11:58,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651261075] [2021-08-21 12:11:58,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:11:58,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:58,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:11:58,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:11:58,338 INFO L87 Difference]: Start difference. First operand 20975 states and 62144 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:58,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:58,578 INFO L93 Difference]: Finished difference Result 21396 states and 62738 transitions. [2021-08-21 12:11:58,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:11:58,579 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:11:58,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:58,637 INFO L225 Difference]: With dead ends: 21396 [2021-08-21 12:11:58,637 INFO L226 Difference]: Without dead ends: 21392 [2021-08-21 12:11:58,637 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 116.8ms TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:11:58,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21392 states. [2021-08-21 12:11:58,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21392 to 20984. [2021-08-21 12:11:58,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20984 states, 20983 states have (on average 2.9631129962350475) internal successors, (62175), 20983 states have internal predecessors, (62175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:59,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20984 states to 20984 states and 62175 transitions. [2021-08-21 12:11:59,045 INFO L78 Accepts]: Start accepts. Automaton has 20984 states and 62175 transitions. Word has length 23 [2021-08-21 12:11:59,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:59,045 INFO L470 AbstractCegarLoop]: Abstraction has 20984 states and 62175 transitions. [2021-08-21 12:11:59,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:59,045 INFO L276 IsEmpty]: Start isEmpty. Operand 20984 states and 62175 transitions. [2021-08-21 12:11:59,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:11:59,066 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:59,067 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:59,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Ended with exit code 0 [2021-08-21 12:11:59,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable381 [2021-08-21 12:11:59,285 INFO L402 AbstractCegarLoop]: === Iteration 383 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:59,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:59,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1281470772, now seen corresponding path program 379 times [2021-08-21 12:11:59,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:59,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471444571] [2021-08-21 12:11:59,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:59,286 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:59,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:59,442 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 33 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:11:59,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:59,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471444571] [2021-08-21 12:11:59,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471444571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:59,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737581355] [2021-08-21 12:11:59,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:11:59,442 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:59,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:59,443 INFO L229 MonitoredProcess]: Starting monitored process 381 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:59,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (381)] Waiting until timeout for monitored process [2021-08-21 12:12:01,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:01,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:12:01,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:02,033 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:12:02,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737581355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:02,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:02,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-08-21 12:12:02,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010678630] [2021-08-21 12:12:02,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:12:02,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:02,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:12:02,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:12:02,038 INFO L87 Difference]: Start difference. First operand 20984 states and 62175 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:02,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:02,252 INFO L93 Difference]: Finished difference Result 25473 states and 74545 transitions. [2021-08-21 12:12:02,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:12:02,253 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:12:02,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:02,311 INFO L225 Difference]: With dead ends: 25473 [2021-08-21 12:12:02,311 INFO L226 Difference]: Without dead ends: 25467 [2021-08-21 12:12:02,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 180.6ms TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:12:02,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25467 states. [2021-08-21 12:12:02,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25467 to 20984. [2021-08-21 12:12:02,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20984 states, 20983 states have (on average 2.9628270504694276) internal successors, (62169), 20983 states have internal predecessors, (62169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:02,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20984 states to 20984 states and 62169 transitions. [2021-08-21 12:12:02,849 INFO L78 Accepts]: Start accepts. Automaton has 20984 states and 62169 transitions. Word has length 23 [2021-08-21 12:12:02,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:02,849 INFO L470 AbstractCegarLoop]: Abstraction has 20984 states and 62169 transitions. [2021-08-21 12:12:02,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:02,850 INFO L276 IsEmpty]: Start isEmpty. Operand 20984 states and 62169 transitions. [2021-08-21 12:12:02,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:12:02,870 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:02,870 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:02,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (381)] Forceful destruction successful, exit code 0 [2021-08-21 12:12:03,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,381 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:03,090 INFO L402 AbstractCegarLoop]: === Iteration 384 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:12:03,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:03,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1413058670, now seen corresponding path program 380 times [2021-08-21 12:12:03,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:03,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706112914] [2021-08-21 12:12:03,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:03,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:03,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:03,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:03,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706112914] [2021-08-21 12:12:03,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706112914] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:03,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949097557] [2021-08-21 12:12:03,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:12:03,239 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:03,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:03,240 INFO L229 MonitoredProcess]: Starting monitored process 382 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:12:03,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (382)] Waiting until timeout for monitored process [2021-08-21 12:12:05,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:12:05,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:05,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:12:05,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:05,886 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:12:05,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949097557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:05,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:05,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-08-21 12:12:05,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113229525] [2021-08-21 12:12:05,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:12:05,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:05,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:12:05,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:12:05,887 INFO L87 Difference]: Start difference. First operand 20984 states and 62169 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:06,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:06,130 INFO L93 Difference]: Finished difference Result 25490 states and 74561 transitions. [2021-08-21 12:12:06,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:12:06,132 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:12:06,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:06,202 INFO L225 Difference]: With dead ends: 25490 [2021-08-21 12:12:06,202 INFO L226 Difference]: Without dead ends: 25482 [2021-08-21 12:12:06,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 134.5ms TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:12:06,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25482 states. [2021-08-21 12:12:06,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25482 to 21013. [2021-08-21 12:12:06,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21013 states, 21012 states have (on average 2.962450028555111) internal successors, (62247), 21012 states have internal predecessors, (62247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:06,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21013 states to 21013 states and 62247 transitions. [2021-08-21 12:12:06,746 INFO L78 Accepts]: Start accepts. Automaton has 21013 states and 62247 transitions. Word has length 23 [2021-08-21 12:12:06,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:06,746 INFO L470 AbstractCegarLoop]: Abstraction has 21013 states and 62247 transitions. [2021-08-21 12:12:06,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:06,746 INFO L276 IsEmpty]: Start isEmpty. Operand 21013 states and 62247 transitions. [2021-08-21 12:12:06,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:12:06,771 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:06,771 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:06,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (382)] Forceful destruction successful, exit code 0 [2021-08-21 12:12:06,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,382 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:06,989 INFO L402 AbstractCegarLoop]: === Iteration 385 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:12:06,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:06,989 INFO L82 PathProgramCache]: Analyzing trace with hash -955874548, now seen corresponding path program 381 times [2021-08-21 12:12:06,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:06,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681207644] [2021-08-21 12:12:06,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:06,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:07,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:07,087 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:12:07,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:07,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681207644] [2021-08-21 12:12:07,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681207644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:07,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306842888] [2021-08-21 12:12:07,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:12:07,088 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:07,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:07,089 INFO L229 MonitoredProcess]: Starting monitored process 383 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:12:07,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Waiting until timeout for monitored process [2021-08-21 12:12:09,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:12:09,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:09,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:12:09,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:09,672 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:12:09,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306842888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:09,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:09,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:12:09,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86657438] [2021-08-21 12:12:09,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:12:09,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:09,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:12:09,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:12:09,673 INFO L87 Difference]: Start difference. First operand 21013 states and 62247 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:09,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:09,908 INFO L93 Difference]: Finished difference Result 25190 states and 73627 transitions. [2021-08-21 12:12:09,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:12:09,909 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:12:09,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:09,957 INFO L225 Difference]: With dead ends: 25190 [2021-08-21 12:12:09,957 INFO L226 Difference]: Without dead ends: 25180 [2021-08-21 12:12:09,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 127.1ms TimeCoverageRelationStatistics Valid=226, Invalid=476, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:12:10,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25180 states. [2021-08-21 12:12:10,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25180 to 21013. [2021-08-21 12:12:10,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21013 states, 21012 states have (on average 2.962164477441462) internal successors, (62241), 21012 states have internal predecessors, (62241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:10,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21013 states to 21013 states and 62241 transitions. [2021-08-21 12:12:10,479 INFO L78 Accepts]: Start accepts. Automaton has 21013 states and 62241 transitions. Word has length 23 [2021-08-21 12:12:10,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:10,479 INFO L470 AbstractCegarLoop]: Abstraction has 21013 states and 62241 transitions. [2021-08-21 12:12:10,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:10,479 INFO L276 IsEmpty]: Start isEmpty. Operand 21013 states and 62241 transitions. [2021-08-21 12:12:10,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:12:10,499 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:10,499 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:10,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Forceful destruction successful, exit code 0 [2021-08-21 12:12:10,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,383 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:10,723 INFO L402 AbstractCegarLoop]: === Iteration 386 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:12:10,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:10,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1378360274, now seen corresponding path program 382 times [2021-08-21 12:12:10,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:10,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305296423] [2021-08-21 12:12:10,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:10,723 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:10,820 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 35 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:10,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:10,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305296423] [2021-08-21 12:12:10,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305296423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:10,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252754107] [2021-08-21 12:12:10,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:12:10,820 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:10,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:10,821 INFO L229 MonitoredProcess]: Starting monitored process 384 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:12:10,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (384)] Waiting until timeout for monitored process [2021-08-21 12:12:13,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:12:13,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:13,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:12:13,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 37 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:12:13,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252754107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:13,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:13,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-08-21 12:12:13,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521016275] [2021-08-21 12:12:13,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:12:13,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:13,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:12:13,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:12:13,632 INFO L87 Difference]: Start difference. First operand 21013 states and 62241 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:13,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:13,869 INFO L93 Difference]: Finished difference Result 25219 states and 73655 transitions. [2021-08-21 12:12:13,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:12:13,869 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:12:13,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:13,915 INFO L225 Difference]: With dead ends: 25219 [2021-08-21 12:12:13,915 INFO L226 Difference]: Without dead ends: 25207 [2021-08-21 12:12:13,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 143.6ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:12:13,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25207 states. [2021-08-21 12:12:14,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25207 to 21110. [2021-08-21 12:12:14,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21110 states, 21109 states have (on average 2.9619593538301197) internal successors, (62524), 21109 states have internal predecessors, (62524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:14,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21110 states to 21110 states and 62524 transitions. [2021-08-21 12:12:14,356 INFO L78 Accepts]: Start accepts. Automaton has 21110 states and 62524 transitions. Word has length 23 [2021-08-21 12:12:14,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:14,356 INFO L470 AbstractCegarLoop]: Abstraction has 21110 states and 62524 transitions. [2021-08-21 12:12:14,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:14,357 INFO L276 IsEmpty]: Start isEmpty. Operand 21110 states and 62524 transitions. [2021-08-21 12:12:14,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:12:14,378 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:14,378 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:14,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (384)] Forceful destruction successful, exit code 0 [2021-08-21 12:12:14,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable385 [2021-08-21 12:12:14,597 INFO L402 AbstractCegarLoop]: === Iteration 387 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:12:14,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:14,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1590515892, now seen corresponding path program 383 times [2021-08-21 12:12:14,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:14,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083658675] [2021-08-21 12:12:14,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:14,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:14,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:12:14,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:14,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083658675] [2021-08-21 12:12:14,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083658675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:14,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864706374] [2021-08-21 12:12:14,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:12:14,700 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:14,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:14,701 INFO L229 MonitoredProcess]: Starting monitored process 385 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:12:14,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (385)] Waiting until timeout for monitored process [2021-08-21 12:12:17,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:12:17,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:17,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:12:17,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:17,505 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:12:17,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864706374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:17,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:17,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-08-21 12:12:17,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464084167] [2021-08-21 12:12:17,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:12:17,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:17,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:12:17,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:12:17,506 INFO L87 Difference]: Start difference. First operand 21110 states and 62524 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:17,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:17,732 INFO L93 Difference]: Finished difference Result 23572 states and 68999 transitions. [2021-08-21 12:12:17,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:12:17,733 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:12:17,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:17,774 INFO L225 Difference]: With dead ends: 23572 [2021-08-21 12:12:17,774 INFO L226 Difference]: Without dead ends: 23558 [2021-08-21 12:12:17,774 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 154.0ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:12:17,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23558 states. [2021-08-21 12:12:18,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23558 to 21110. [2021-08-21 12:12:18,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21110 states, 21109 states have (on average 2.961864607513383) internal successors, (62522), 21109 states have internal predecessors, (62522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:18,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21110 states to 21110 states and 62522 transitions. [2021-08-21 12:12:18,141 INFO L78 Accepts]: Start accepts. Automaton has 21110 states and 62522 transitions. Word has length 23 [2021-08-21 12:12:18,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:18,141 INFO L470 AbstractCegarLoop]: Abstraction has 21110 states and 62522 transitions. [2021-08-21 12:12:18,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:18,141 INFO L276 IsEmpty]: Start isEmpty. Operand 21110 states and 62522 transitions. [2021-08-21 12:12:18,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:12:18,161 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:18,161 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:18,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (385)] Forceful destruction successful, exit code 0 [2021-08-21 12:12:18,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 385 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-08-21 12:12:18,385 INFO L402 AbstractCegarLoop]: === Iteration 388 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:12:18,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:18,385 INFO L82 PathProgramCache]: Analyzing trace with hash 422594542, now seen corresponding path program 384 times [2021-08-21 12:12:18,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:18,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108091133] [2021-08-21 12:12:18,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:18,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:18,496 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:18,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:18,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108091133] [2021-08-21 12:12:18,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108091133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:18,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896987183] [2021-08-21 12:12:18,496 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:12:18,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:18,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:18,497 INFO L229 MonitoredProcess]: Starting monitored process 386 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:12:18,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (386)] Waiting until timeout for monitored process [2021-08-21 12:12:21,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:12:21,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:21,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:12:21,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:21,303 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:21,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896987183] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:21,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:21,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-21 12:12:21,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737713208] [2021-08-21 12:12:21,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:12:21,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:21,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:12:21,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:12:21,304 INFO L87 Difference]: Start difference. First operand 21110 states and 62522 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:21,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:21,554 INFO L93 Difference]: Finished difference Result 23606 states and 69035 transitions. [2021-08-21 12:12:21,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:12:21,554 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:12:21,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:21,594 INFO L225 Difference]: With dead ends: 23606 [2021-08-21 12:12:21,595 INFO L226 Difference]: Without dead ends: 23590 [2021-08-21 12:12:21,595 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 171.6ms TimeCoverageRelationStatistics Valid=298, Invalid=632, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:12:21,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23590 states. [2021-08-21 12:12:21,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23590 to 21121. [2021-08-21 12:12:22,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21121 states, 21120 states have (on average 2.961789772727273) internal successors, (62553), 21120 states have internal predecessors, (62553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:22,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21121 states to 21121 states and 62553 transitions. [2021-08-21 12:12:22,059 INFO L78 Accepts]: Start accepts. Automaton has 21121 states and 62553 transitions. Word has length 23 [2021-08-21 12:12:22,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:22,059 INFO L470 AbstractCegarLoop]: Abstraction has 21121 states and 62553 transitions. [2021-08-21 12:12:22,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:22,059 INFO L276 IsEmpty]: Start isEmpty. Operand 21121 states and 62553 transitions. [2021-08-21 12:12:22,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:12:22,080 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:22,080 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:22,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (386)] Forceful destruction successful, exit code 0 [2021-08-21 12:12:22,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-08-21 12:12:22,294 INFO L402 AbstractCegarLoop]: === Iteration 389 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:12:22,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:22,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1595491444, now seen corresponding path program 385 times [2021-08-21 12:12:22,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:22,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937446178] [2021-08-21 12:12:22,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:22,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:22,415 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 55 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:22,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:22,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937446178] [2021-08-21 12:12:22,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937446178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:22,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348423073] [2021-08-21 12:12:22,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:12:22,416 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:22,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:22,417 INFO L229 MonitoredProcess]: Starting monitored process 387 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:12:22,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (387)] Waiting until timeout for monitored process [2021-08-21 12:12:25,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:25,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:12:25,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:25,168 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 54 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:12:25,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348423073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:25,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:25,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-08-21 12:12:25,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070182456] [2021-08-21 12:12:25,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:12:25,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:25,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:12:25,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:12:25,169 INFO L87 Difference]: Start difference. First operand 21121 states and 62553 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:25,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:25,422 INFO L93 Difference]: Finished difference Result 21529 states and 63528 transitions. [2021-08-21 12:12:25,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:12:25,422 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:12:25,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:25,465 INFO L225 Difference]: With dead ends: 21529 [2021-08-21 12:12:25,466 INFO L226 Difference]: Without dead ends: 21520 [2021-08-21 12:12:25,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 194.9ms TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:12:25,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21520 states. [2021-08-21 12:12:25,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21520 to 21121. [2021-08-21 12:12:25,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21121 states, 21120 states have (on average 2.9617424242424244) internal successors, (62552), 21120 states have internal predecessors, (62552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:25,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21121 states to 21121 states and 62552 transitions. [2021-08-21 12:12:25,826 INFO L78 Accepts]: Start accepts. Automaton has 21121 states and 62552 transitions. Word has length 23 [2021-08-21 12:12:25,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:25,826 INFO L470 AbstractCegarLoop]: Abstraction has 21121 states and 62552 transitions. [2021-08-21 12:12:25,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:25,826 INFO L276 IsEmpty]: Start isEmpty. Operand 21121 states and 62552 transitions. [2021-08-21 12:12:25,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:12:25,846 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:25,846 INFO L512 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:25,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (387)] Forceful destruction successful, exit code 0 [2021-08-21 12:12:26,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable388,387 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:26,070 INFO L402 AbstractCegarLoop]: === Iteration 390 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:12:26,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:26,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1135260989, now seen corresponding path program 386 times [2021-08-21 12:12:26,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:26,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270253383] [2021-08-21 12:12:26,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:26,071 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:26,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:26,162 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:26,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:26,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270253383] [2021-08-21 12:12:26,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270253383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:26,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204615340] [2021-08-21 12:12:26,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:12:26,162 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:26,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:26,163 INFO L229 MonitoredProcess]: Starting monitored process 388 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:12:26,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (388)] Waiting until timeout for monitored process [2021-08-21 12:12:28,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:12:28,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:28,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:12:28,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:29,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:12:29,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-08-21 12:12:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:49,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204615340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:49,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:49,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-08-21 12:12:49,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295724727] [2021-08-21 12:12:49,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 12:12:49,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:49,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 12:12:49,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:12:49,109 INFO L87 Difference]: Start difference. First operand 21121 states and 62552 transitions. Second operand has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:49,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:49,473 INFO L93 Difference]: Finished difference Result 21345 states and 63001 transitions. [2021-08-21 12:12:49,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:12:49,473 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:12:49,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:49,515 INFO L225 Difference]: With dead ends: 21345 [2021-08-21 12:12:49,515 INFO L226 Difference]: Without dead ends: 21342 [2021-08-21 12:12:49,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 278.3ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:12:49,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21342 states. [2021-08-21 12:12:49,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21342 to 21212. [2021-08-21 12:12:49,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21212 states, 21211 states have (on average 2.9614351044269482) internal successors, (62815), 21211 states have internal predecessors, (62815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:49,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21212 states to 21212 states and 62815 transitions. [2021-08-21 12:12:49,921 INFO L78 Accepts]: Start accepts. Automaton has 21212 states and 62815 transitions. Word has length 24 [2021-08-21 12:12:49,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:49,921 INFO L470 AbstractCegarLoop]: Abstraction has 21212 states and 62815 transitions. [2021-08-21 12:12:49,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:49,921 INFO L276 IsEmpty]: Start isEmpty. Operand 21212 states and 62815 transitions. [2021-08-21 12:12:49,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:12:49,946 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:49,946 INFO L512 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:49,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (388)] Forceful destruction successful, exit code 0 [2021-08-21 12:12:50,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-08-21 12:12:50,147 INFO L402 AbstractCegarLoop]: === Iteration 391 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:12:50,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:50,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1476487549, now seen corresponding path program 387 times [2021-08-21 12:12:50,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:50,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644345933] [2021-08-21 12:12:50,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:50,148 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:50,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:50,235 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:12:50,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:50,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644345933] [2021-08-21 12:12:50,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644345933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:50,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123017200] [2021-08-21 12:12:50,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:12:50,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:50,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:50,236 INFO L229 MonitoredProcess]: Starting monitored process 389 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:12:50,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Waiting until timeout for monitored process [2021-08-21 12:12:53,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:12:53,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:53,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:12:53,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:53,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:12:53,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-08-21 12:13:06,046 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:06,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123017200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:06,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:06,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-08-21 12:13:06,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977793518] [2021-08-21 12:13:06,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 12:13:06,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:06,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 12:13:06,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:13:06,047 INFO L87 Difference]: Start difference. First operand 21212 states and 62815 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:06,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:06,451 INFO L93 Difference]: Finished difference Result 21457 states and 63296 transitions. [2021-08-21 12:13:06,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:13:06,451 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:13:06,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:06,490 INFO L225 Difference]: With dead ends: 21457 [2021-08-21 12:13:06,490 INFO L226 Difference]: Without dead ends: 21454 [2021-08-21 12:13:06,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 293.5ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:13:06,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21454 states. [2021-08-21 12:13:06,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21454 to 21280. [2021-08-21 12:13:06,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21280 states, 21279 states have (on average 2.96240424831994) internal successors, (63037), 21279 states have internal predecessors, (63037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:06,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21280 states to 21280 states and 63037 transitions. [2021-08-21 12:13:06,862 INFO L78 Accepts]: Start accepts. Automaton has 21280 states and 63037 transitions. Word has length 24 [2021-08-21 12:13:06,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:06,862 INFO L470 AbstractCegarLoop]: Abstraction has 21280 states and 63037 transitions. [2021-08-21 12:13:06,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:06,863 INFO L276 IsEmpty]: Start isEmpty. Operand 21280 states and 63037 transitions. [2021-08-21 12:13:06,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:13:06,884 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:06,884 INFO L512 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:06,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Forceful destruction successful, exit code 0 [2021-08-21 12:13:07,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,389 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:07,104 INFO L402 AbstractCegarLoop]: === Iteration 392 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:13:07,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:07,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1768086651, now seen corresponding path program 388 times [2021-08-21 12:13:07,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:07,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031882452] [2021-08-21 12:13:07,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:07,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:07,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:07,194 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:13:07,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:07,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031882452] [2021-08-21 12:13:07,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031882452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:07,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295735925] [2021-08-21 12:13:07,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:13:07,194 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:07,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:07,195 INFO L229 MonitoredProcess]: Starting monitored process 390 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:13:07,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (390)] Waiting until timeout for monitored process [2021-08-21 12:13:09,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:13:09,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:09,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:13:09,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:10,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:13:10,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-08-21 12:13:26,690 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:26,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295735925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:26,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:26,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-08-21 12:13:26,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041899693] [2021-08-21 12:13:26,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 12:13:26,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:26,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 12:13:26,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:13:26,691 INFO L87 Difference]: Start difference. First operand 21280 states and 63037 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:27,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:27,067 INFO L93 Difference]: Finished difference Result 21542 states and 63571 transitions. [2021-08-21 12:13:27,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:13:27,068 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:13:27,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:27,105 INFO L225 Difference]: With dead ends: 21542 [2021-08-21 12:13:27,105 INFO L226 Difference]: Without dead ends: 21539 [2021-08-21 12:13:27,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 261.3ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:13:27,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21539 states. [2021-08-21 12:13:27,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21539 to 21353. [2021-08-21 12:13:27,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21353 states, 21352 states have (on average 2.964031472461596) internal successors, (63288), 21352 states have internal predecessors, (63288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:27,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21353 states to 21353 states and 63288 transitions. [2021-08-21 12:13:27,474 INFO L78 Accepts]: Start accepts. Automaton has 21353 states and 63288 transitions. Word has length 24 [2021-08-21 12:13:27,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:27,474 INFO L470 AbstractCegarLoop]: Abstraction has 21353 states and 63288 transitions. [2021-08-21 12:13:27,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:27,474 INFO L276 IsEmpty]: Start isEmpty. Operand 21353 states and 63288 transitions. [2021-08-21 12:13:27,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:13:27,495 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:27,495 INFO L512 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:27,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (390)] Forceful destruction successful, exit code 0 [2021-08-21 12:13:27,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable391 [2021-08-21 12:13:27,699 INFO L402 AbstractCegarLoop]: === Iteration 393 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:13:27,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:27,699 INFO L82 PathProgramCache]: Analyzing trace with hash -729328253, now seen corresponding path program 389 times [2021-08-21 12:13:27,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:27,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849246727] [2021-08-21 12:13:27,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:27,699 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:27,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:27,798 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:13:27,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:27,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849246727] [2021-08-21 12:13:27,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849246727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:27,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509495104] [2021-08-21 12:13:27,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:13:27,799 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:27,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:27,799 INFO L229 MonitoredProcess]: Starting monitored process 391 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:13:27,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Waiting until timeout for monitored process [2021-08-21 12:13:30,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:13:30,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:30,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:13:30,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:31,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:13:31,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-08-21 12:13:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:51,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509495104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:51,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:51,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-08-21 12:13:51,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087962917] [2021-08-21 12:13:51,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 12:13:51,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:51,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 12:13:51,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:13:51,265 INFO L87 Difference]: Start difference. First operand 21353 states and 63288 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:51,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:51,673 INFO L93 Difference]: Finished difference Result 21655 states and 63939 transitions. [2021-08-21 12:13:51,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:13:51,674 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:13:51,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:51,717 INFO L225 Difference]: With dead ends: 21655 [2021-08-21 12:13:51,717 INFO L226 Difference]: Without dead ends: 21652 [2021-08-21 12:13:51,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 279.0ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:13:51,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21652 states. [2021-08-21 12:13:52,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21652 to 21453. [2021-08-21 12:13:52,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21453 states, 21452 states have (on average 2.966436695879172) internal successors, (63636), 21452 states have internal predecessors, (63636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:52,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21453 states to 21453 states and 63636 transitions. [2021-08-21 12:13:52,231 INFO L78 Accepts]: Start accepts. Automaton has 21453 states and 63636 transitions. Word has length 24 [2021-08-21 12:13:52,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:52,231 INFO L470 AbstractCegarLoop]: Abstraction has 21453 states and 63636 transitions. [2021-08-21 12:13:52,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:52,231 INFO L276 IsEmpty]: Start isEmpty. Operand 21453 states and 63636 transitions. [2021-08-21 12:13:52,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:13:52,254 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:52,254 INFO L512 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:52,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Forceful destruction successful, exit code 0 [2021-08-21 12:13:52,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-08-21 12:13:52,478 INFO L402 AbstractCegarLoop]: === Iteration 394 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:13:52,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:52,482 INFO L82 PathProgramCache]: Analyzing trace with hash -839778949, now seen corresponding path program 390 times [2021-08-21 12:13:52,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:52,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322343026] [2021-08-21 12:13:52,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:52,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:52,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:52,553 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:13:52,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:52,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322343026] [2021-08-21 12:13:52,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322343026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:52,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590145038] [2021-08-21 12:13:52,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:13:52,553 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:52,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:52,554 INFO L229 MonitoredProcess]: Starting monitored process 392 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:13:52,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Waiting until timeout for monitored process [2021-08-21 12:13:55,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 12:13:55,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:55,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:13:55,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:55,745 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:13:55,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-08-21 12:14:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:07,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590145038] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:07,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:07,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-08-21 12:14:07,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882593172] [2021-08-21 12:14:07,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 12:14:07,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:07,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 12:14:07,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:14:07,673 INFO L87 Difference]: Start difference. First operand 21453 states and 63636 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:08,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:08,077 INFO L93 Difference]: Finished difference Result 21781 states and 64349 transitions. [2021-08-21 12:14:08,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:14:08,077 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:14:08,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:08,135 INFO L225 Difference]: With dead ends: 21781 [2021-08-21 12:14:08,135 INFO L226 Difference]: Without dead ends: 21778 [2021-08-21 12:14:08,136 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 259.1ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:14:08,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21778 states. [2021-08-21 12:14:08,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21778 to 21564. [2021-08-21 12:14:08,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21564 states, 21563 states have (on average 2.9694383898344388) internal successors, (64030), 21563 states have internal predecessors, (64030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:08,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21564 states to 21564 states and 64030 transitions. [2021-08-21 12:14:08,638 INFO L78 Accepts]: Start accepts. Automaton has 21564 states and 64030 transitions. Word has length 24 [2021-08-21 12:14:08,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:08,638 INFO L470 AbstractCegarLoop]: Abstraction has 21564 states and 64030 transitions. [2021-08-21 12:14:08,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:08,638 INFO L276 IsEmpty]: Start isEmpty. Operand 21564 states and 64030 transitions. [2021-08-21 12:14:08,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:14:08,662 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:08,662 INFO L512 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:08,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Forceful destruction successful, exit code 0 [2021-08-21 12:14:08,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,392 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:08,873 INFO L402 AbstractCegarLoop]: === Iteration 395 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:14:08,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:08,876 INFO L82 PathProgramCache]: Analyzing trace with hash 31216771, now seen corresponding path program 391 times [2021-08-21 12:14:08,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:08,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720437756] [2021-08-21 12:14:08,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:08,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:08,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:08,964 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:14:08,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:08,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720437756] [2021-08-21 12:14:08,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720437756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:08,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341661615] [2021-08-21 12:14:08,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:14:08,964 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:08,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:08,965 INFO L229 MonitoredProcess]: Starting monitored process 393 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:14:08,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (393)] Waiting until timeout for monitored process [2021-08-21 12:14:11,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:11,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:14:11,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:12,342 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:14:12,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-08-21 12:14:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:30,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341661615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:30,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:30,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-08-21 12:14:30,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213064305] [2021-08-21 12:14:30,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 12:14:30,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:30,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 12:14:30,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:14:30,286 INFO L87 Difference]: Start difference. First operand 21564 states and 64030 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:30,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:30,725 INFO L93 Difference]: Finished difference Result 21903 states and 64775 transitions. [2021-08-21 12:14:30,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:14:30,726 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:14:30,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:30,780 INFO L225 Difference]: With dead ends: 21903 [2021-08-21 12:14:30,780 INFO L226 Difference]: Without dead ends: 21900 [2021-08-21 12:14:30,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 370.0ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:14:30,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21900 states. [2021-08-21 12:14:31,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21900 to 21681. [2021-08-21 12:14:31,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21681 states, 21680 states have (on average 2.972878228782288) internal successors, (64452), 21680 states have internal predecessors, (64452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:31,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21681 states to 21681 states and 64452 transitions. [2021-08-21 12:14:31,188 INFO L78 Accepts]: Start accepts. Automaton has 21681 states and 64452 transitions. Word has length 24 [2021-08-21 12:14:31,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:31,188 INFO L470 AbstractCegarLoop]: Abstraction has 21681 states and 64452 transitions. [2021-08-21 12:14:31,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:31,188 INFO L276 IsEmpty]: Start isEmpty. Operand 21681 states and 64452 transitions. [2021-08-21 12:14:31,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:14:31,210 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:31,210 INFO L512 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:31,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (393)] Forceful destruction successful, exit code 0 [2021-08-21 12:14:31,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,393 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:31,425 INFO L402 AbstractCegarLoop]: === Iteration 396 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:14:31,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:31,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1262280315, now seen corresponding path program 392 times [2021-08-21 12:14:31,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:31,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353422336] [2021-08-21 12:14:31,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:31,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:31,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:31,517 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:14:31,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:31,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353422336] [2021-08-21 12:14:31,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353422336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:31,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134475859] [2021-08-21 12:14:31,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:14:31,517 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:31,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:31,518 INFO L229 MonitoredProcess]: Starting monitored process 394 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:14:31,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Waiting until timeout for monitored process [2021-08-21 12:14:34,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:14:34,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:34,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:14:34,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:34,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:14:34,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-08-21 12:14:48,771 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:48,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134475859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:48,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:48,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-08-21 12:14:48,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836101116] [2021-08-21 12:14:48,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 12:14:48,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:48,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 12:14:48,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:14:48,772 INFO L87 Difference]: Start difference. First operand 21681 states and 64452 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:49,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:49,238 INFO L93 Difference]: Finished difference Result 22133 states and 65553 transitions. [2021-08-21 12:14:49,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:14:49,238 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:14:49,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:49,287 INFO L225 Difference]: With dead ends: 22133 [2021-08-21 12:14:49,288 INFO L226 Difference]: Without dead ends: 22130 [2021-08-21 12:14:49,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 403.1ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:14:49,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22130 states. [2021-08-21 12:14:49,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22130 to 21906. [2021-08-21 12:14:49,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21906 states, 21905 states have (on average 2.9781328463821044) internal successors, (65236), 21905 states have internal predecessors, (65236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:49,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21906 states to 21906 states and 65236 transitions. [2021-08-21 12:14:49,754 INFO L78 Accepts]: Start accepts. Automaton has 21906 states and 65236 transitions. Word has length 24 [2021-08-21 12:14:49,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:49,754 INFO L470 AbstractCegarLoop]: Abstraction has 21906 states and 65236 transitions. [2021-08-21 12:14:49,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:49,754 INFO L276 IsEmpty]: Start isEmpty. Operand 21906 states and 65236 transitions. [2021-08-21 12:14:49,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:14:49,781 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:49,781 INFO L512 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:49,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Forceful destruction successful, exit code 0 [2021-08-21 12:14:49,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,394 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:49,997 INFO L402 AbstractCegarLoop]: === Iteration 397 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:14:49,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:49,997 INFO L82 PathProgramCache]: Analyzing trace with hash 770544515, now seen corresponding path program 393 times [2021-08-21 12:14:49,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:49,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933916405] [2021-08-21 12:14:49,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:49,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:50,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:14:50,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:50,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933916405] [2021-08-21 12:14:50,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933916405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:50,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24656046] [2021-08-21 12:14:50,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:14:50,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:50,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:50,218 INFO L229 MonitoredProcess]: Starting monitored process 395 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:14:50,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (395)] Waiting until timeout for monitored process [2021-08-21 12:14:52,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:14:52,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:52,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:14:52,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:53,540 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:14:53,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-08-21 12:15:05,897 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:05,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24656046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:05,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:05,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-08-21 12:15:05,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112410154] [2021-08-21 12:15:05,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 12:15:05,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:05,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 12:15:05,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:15:05,898 INFO L87 Difference]: Start difference. First operand 21906 states and 65236 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:06,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:06,330 INFO L93 Difference]: Finished difference Result 22373 states and 66359 transitions. [2021-08-21 12:15:06,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:15:06,330 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:15:06,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:06,369 INFO L225 Difference]: With dead ends: 22373 [2021-08-21 12:15:06,369 INFO L226 Difference]: Without dead ends: 22370 [2021-08-21 12:15:06,370 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 329.4ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:15:06,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22370 states. [2021-08-21 12:15:06,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22370 to 22143. [2021-08-21 12:15:06,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22143 states, 22142 states have (on average 2.9827928823051213) internal successors, (66045), 22142 states have internal predecessors, (66045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:06,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22143 states to 22143 states and 66045 transitions. [2021-08-21 12:15:06,848 INFO L78 Accepts]: Start accepts. Automaton has 22143 states and 66045 transitions. Word has length 24 [2021-08-21 12:15:06,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:06,848 INFO L470 AbstractCegarLoop]: Abstraction has 22143 states and 66045 transitions. [2021-08-21 12:15:06,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:06,848 INFO L276 IsEmpty]: Start isEmpty. Operand 22143 states and 66045 transitions. [2021-08-21 12:15:06,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:15:06,873 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:06,873 INFO L512 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:06,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (395)] Forceful destruction successful, exit code 0 [2021-08-21 12:15:07,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,395 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:07,093 INFO L402 AbstractCegarLoop]: === Iteration 398 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:15:07,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:07,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1588363397, now seen corresponding path program 394 times [2021-08-21 12:15:07,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:07,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681973129] [2021-08-21 12:15:07,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:07,096 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:07,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:15:07,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:07,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681973129] [2021-08-21 12:15:07,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681973129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:07,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386905088] [2021-08-21 12:15:07,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:15:07,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:07,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:07,188 INFO L229 MonitoredProcess]: Starting monitored process 396 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:15:07,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (396)] Waiting until timeout for monitored process Received shutdown request... [2021-08-21 12:15:08,539 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 12:15:08,541 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (396)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 12:15:09,565 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 12:15:09,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (396)] Forceful destruction successful, exit code 0 [2021-08-21 12:15:09,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 [2021-08-21 12:15:09,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397,396 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:09,766 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 10,while executing Executor. [2021-08-21 12:15:09,768 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 12:15:09,768 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 12:15:09,772 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 12:15:09,772 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 12:15:09,773 INFO L202 PluginConnector]: Adding new model unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 12:15:09 BasicIcfg [2021-08-21 12:15:09,773 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 12:15:09,774 INFO L168 Benchmark]: Toolchain (without parser) took 937145.58 ms. Allocated memory was 154.1 MB in the beginning and 2.4 GB in the end (delta: 2.2 GB). Free memory was 134.7 MB in the beginning and 1.1 GB in the end (delta: -984.4 MB). Peak memory consumption was 2.1 GB. Max. memory is 8.0 GB. [2021-08-21 12:15:09,774 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 154.1 MB. Free memory was 135.8 MB in the beginning and 135.7 MB in the end (delta: 65.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 12:15:09,774 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.98 ms. Allocated memory is still 154.1 MB. Free memory was 134.5 MB in the beginning and 133.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 12:15:09,774 INFO L168 Benchmark]: Boogie Preprocessor took 24.14 ms. Allocated memory is still 154.1 MB. Free memory was 133.0 MB in the beginning and 132.1 MB in the end (delta: 874.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 12:15:09,774 INFO L168 Benchmark]: RCFGBuilder took 401.34 ms. Allocated memory is still 154.1 MB. Free memory was 132.0 MB in the beginning and 118.2 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-21 12:15:09,775 INFO L168 Benchmark]: TraceAbstraction took 936678.33 ms. Allocated memory was 154.1 MB in the beginning and 2.4 GB in the end (delta: 2.2 GB). Free memory was 117.7 MB in the beginning and 1.1 GB in the end (delta: -1.0 GB). Peak memory consumption was 2.1 GB. Max. memory is 8.0 GB. [2021-08-21 12:15:09,775 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 0.10 ms. Allocated memory is still 154.1 MB. Free memory was 135.8 MB in the beginning and 135.7 MB in the end (delta: 65.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 36.98 ms. Allocated memory is still 154.1 MB. Free memory was 134.5 MB in the beginning and 133.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 24.14 ms. Allocated memory is still 154.1 MB. Free memory was 133.0 MB in the beginning and 132.1 MB in the end (delta: 874.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 401.34 ms. Allocated memory is still 154.1 MB. Free memory was 132.0 MB in the beginning and 118.2 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 936678.33 ms. Allocated memory was 154.1 MB in the beginning and 2.4 GB in the end (delta: 2.2 GB). Free memory was 117.7 MB in the beginning and 1.1 GB in the end (delta: -1.0 GB). Peak memory consumption was 2.1 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 10,while executing Executor. - TimeoutResultAtElement [Line: 48]: 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 25 with TraceHistMax 10,while executing Executor. - TimeoutResultAtElement [Line: 48]: 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 25 with TraceHistMax 10,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 936598.7ms, OverallIterations: 398, TraceHistogramMax: 10, EmptinessCheckTime: 2879.4ms, AutomataDifference: 70881.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7600 SDtfs, 29668 SDslu, 47659 SDs, 0 SdLazy, 56046 SolverSat, 10076 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 22976.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15882 GetRequests, 7816 SyntacticMatches, 169 SemanticMatches, 7897 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42395 ImplicationChecksByTransitivity, 46121.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=22143occurred in iteration=397, InterpolantAutomatonStates: 7127, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 51787.2ms AutomataMinimizationTime, 397 MinimizatonAttempts, 234373 StatesRemovedByMinimization, 392 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1181.7ms SsaConstructionTime, 5219.5ms SatisfiabilityAnalysisTime, 204384.9ms InterpolantComputationTime, 15891 NumberOfCodeBlocks, 15886 NumberOfCodeBlocksAsserted, 1673 NumberOfCheckSat, 15100 ConstructedInterpolants, 0 QuantifiedInterpolants, 67250 SizeOfPredicates, 248 NumberOfNonLiveVariables, 32144 ConjunctsInSsa, 5593 ConjunctsInUnsatCore, 791 InterpolantComputations, 3 PerfectInterpolantSequences, 13782/33744 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